Diagram sections — 25 (67 total)
AIR CONDITIONING ANTI-LOCK BRAKES ANTI-THEFT COMPUTER DATA LINES CRUISE CONTROL DEFOGGERS ENGINE PERFORMANCE EXTERIOR LIGHTS GROUND DISTRIBUTION HEADLIGHTS HORN INSTRUMENT CLUSTER INTERIOR LIGHTS POWER DISTRIBUTION POWER DOOR LOCKS POWER MIRRORS POWER SEATS POWER WINDOWS RADIO SHIFT INTERLOCKS STARTING/CHARGING SUPPLEMENTAL RESTRAINTS TRANSMISSION WARNING SYSTEMS WIPER/WASHER
AIR CONDITIONING
4.3L 4.3L VIN W, Compressor Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for 4.3L VIN W, Compressor Wiring Diagram for Chevrolet Chevy Express G2002 3500: 33 (4.3l: generator bracket, 5.0l, 5.7l: rear of right cylinder head, 8.1l: rear of left cylinder head) (in engine harness) A/c A/c compressor clutch A/c compressor clutch relay (in underhood fuse block) A/c compressor fuse 10a A/c high pressure switch (rear of a/c compressor) A/c low pressure switch (in refrigerant line) Bi-lev Blend Clutch rly ctrl Defrost Diode (in underhood fuse block) G103 G201 (behind left kick panel) Heat Hot at all times Hot in run Hot in run or start Htr-a/c fuse 12 20a Hvac control assembly I/p fuse block (lower left kick panel) Ign e fuse 10a Low press sig Max Off Pnk Powertrain control module (pcm) (on left front inner fender) Request sig S202 (i/p harn, 7 cm into i/p relay center breakout) S215 (dash harn, 4 cm from radio breakout) Underhood fuse block (left side of engine compt) Vent 4.3L VIN W, Heater Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for 4.3L VIN W, Heater Wiring Diagram for Chevrolet Chevy Express G2002 3500: 47 (auxiliary) (if equipped) (left rear of cabin, behind rear wheelwell) (if equipped) (left rear of cabin, behind rear wheelwell) (left body harn, near chmsl) s400 (rear a/c harn, 13 cm from blower motor relay breakout) (rear a/c harn, 7 cm from blower motor breakout) (rear a/c harn, 7 cm from rear blower motor resistor breakout) Air temperature actuator (under dash, right side of hvac plenum) Assembly (if equipped) (left rear of cabin, behind rear wheelwell) Auxiliary blower motor Auxiliary blower motor resistor Auxiliary blower motor switch (if equipped) Blend Blower fuse 60a Blower motor (right rear of engine compt) Blower motor resistor assembly (right rear of engine compt, in blower motor housing) C2 f C202 Convenience center Def G103 (4.3l, 6.5l: generator bracket, 5.0l, 5.7l: rear of right cylinder head, 8.1l: rear of left cylinder head) G201 (behind left kick panel) G400 (left rear of vehicle) Heat High speed blower motor relay Hot at all times Hot in run Hot in run or start Htr-a/c fuse 12 20a Hvac control assembly I/p fuse block (lower left kick panel) Interior lights system Low speed blower motor relay Med Medium speed blower motor relay Off Red Rr blower fuse 30a Rr hvac fuse 24 10a S152 (gas) s101 (diesel) (in engine harness) S202 (dash harn, in i/p relay center) S215 (dash harn, 4 cm from hvac switch) S405 S412 S413 Tan Underhood fuse block (left side of engine compt) Vent 4.3L VIN W, Manual A/C Wiring Diagram, Cargo Van for Chevrolet Chevy Express G2002 3500 List of elements for 4.3L VIN W, Manual A/C Wiring Diagram, Cargo Van for Chevrolet Chevy Express G2002 3500: 71 (4.3l: gen bracket, 5.0l, 5.7l: rear of rt cyl head, 8.1l: rear of lft cyl head) g103 (if equipped) (left rear of cabin, behind rear wheelwell) (in refrigerant line) a/c low pressure switch (left body harn, 22 cm from front dome lamp breakout) (left body harn, near chmsl breakout) s400 (left rear of cabin, behind rear wheelwell) (rear a/c harn, 7 cm from blower mtr resistor breakout) s405 (under dash, right A/c A/c compressor clutch A/c compressor clutch relay (in underhood fuse block) A/c fuse 10a A/c high pressure switch (rear of a/c compressor) Air temperature actuator (auxiliary) (left rear interior) Auxiliary blower motor Auxiliary blower motor resistor Bi-lev Blend Blower fuse 60a Blower motor (right rear of engine compt) Blower motor resistor assembly (right rear of engine compt, in blower motor housing) C1 c C202 C3 d3 Clutch rly ctrl c2 Convenience center D3 c3 Def Diode (in underhood fuse block) G103 (4.3l generator bracket, 5.0l, 5.7l: rear of rt cylinder head, 8.1l: rear of left cylinder head) G201 (behind left kick panel) G400 (left rear of vehicle) Heat High speed blower motor relay (auxiliary) (if equipped) Hot at all times Hot in run Hot in run or start Htr-a/c fuse 12 20a Hvac control assembly Hvac control assembly (front auxiliary) (if equipped) I/p fuse block (lower left kick panel) Ign e fuse 10a Interior lights system Low press sig Low speed blower motor relay (auxiliary) (if equipped) Max Med Medium speed blower motor relay (auxiliary) (if equipped) Mode actuator (auxiliary) (left rear interior) Off Pnk Powertrain control module (pcm) (on left front inner fender) Red Request sig Rr blower fuse 30a Rr hvac fuse 24 10a S103 (in engine harn) S103 (in engine harness) S152 (in engine harness) S202 S202 (dash harn, in i/p relay center) S404 S411 (rear a/c harn, 5 cm from o/s air valve actuator breakout) S412 (rear a/c harn, 13 cm from blower motor relay breakout) S413 (rear a/c harn, 7 cm from rear blower motor resistor breakout) Side of hvac plenum) air temperature actuator Tan Temp Underhood fuse block (left side of engine compt) Vent Vent mode 4.3L VIN W, Manual A/C Wiring Diagram, Passenger Van for Chevrolet Chevy Express G2002 3500 List of elements for 4.3L VIN W, Manual A/C Wiring Diagram, Passenger Van for Chevrolet Chevy Express G2002 3500: 84 (4.3l: gen bracket, 5.0l, 5.7l: rear of rt cyl head, 8.1l: rear of lft cyl head) g103 (aux hvac harn, 13 cm from front hvac module breakout) (aux hvac harn, 13 cm from rear hvac module breakout) (aux hvac harn, 37 cm from front hvac module breakout) (aux hvac harn, 56 cm from front hvac module breakout) (dash harn, 4 cm from hvac switch) s215 (in engine harness) (in refrigerant line) a/c low pressure switch (left body harn, 22 cm from front dome lamp breakout) (left rear of cabin, behind rear wheelwell) (left rear of vehicle) g402 (rear a/c harn, 13 cm from blower motor relay breakout) (rear a/c harn, 5 cm from o/s air valve actuator breakout) (rear a/c harn, 7 cm from rear blower resistor breakout) (rear aux hvac harn, 29 cm from rear aux hvac module breakout) (under dash right A/c A/c compressor clutch A/c compressor enable relay (in underhood fuse block) A/c fuse 10a A/c high pressure switch (rear of a/c compressor) Auxiliary blower motor (behind left rear wheelhouse) Auxiliary blower motor resistor assembly (left rear of cabin, behind rear wheelwell) Bi-lev Blend Blower fuse 60a Blower motor (right rear of engine compt) Blower motor resistor assembly (right rear of engine compt, in blower motor housing) C1 c C202 Clutch rly ctrl Convenience center Def Diode (in underhood fuse block) G103 (4.3l generator bracket, 5.0l, 5.7l: rear of rt cylinder head, 8.1l: rear of left cylinder head) G201 (behind left kick panel) Heat High speed blower motor relay (auxiliary) Hot at all times Hot in run Hot in run or start Htr-a/c fuse 12 20a Hvac control assembly Hvac control assembly (front auxiliary) Hvac control assembly (rear auxiliary) Hvac control processor auxiliary) (front interior roof panel) I/p fuse block (lower left kick panel) Ign e fuse 10a Interior lights system Low press sig Low speed blower motor relay (auxiliary) Max Med Medium speed blower motor relay (auxiliary) Off Pnk Powertrain control module (pcm) (on left front inner fender) Rear auxiliary mode actuator (left rear interior) Rear auxiliary temperature actuator (left rear interior) Red Request sig Rr blower fuse 30a Rr ctrl Rr hvac fuse 24 10a S103 S103 (in engine harn) S152 (in engine harness) S202 (dash harn, in i/p relay center) S307 S318 S319 S320 S321 S404 S405 (rear a/c harn, 7 cm from blower resistor breakout) S412 S413 Side of hvac plenum) air temperature actuator Tan Temp Under- hood fuse block Underhood fuse block (left side of engine compt) Vent Vent mode
5.0L 5.0L VIN M, Compressor Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for 5.0L VIN M, Compressor Wiring Diagram for Chevrolet Chevy Express G2002 3500: 33 (4.3l: generator bracket, 5.0l, 5.7l: rear of right cylinder head, 8.1l: rear of left cylinder head) (in engine harness) A/c A/c compressor clutch A/c compressor clutch relay (in underhood fuse block) A/c compressor fuse 10a A/c high pressure switch (rear of a/c compressor) A/c low pressure switch (in refrigerant line) Bi-lev Blend Clutch rly ctrl Defrost Diode (in underhood fuse block) G103 G201 (behind left kick panel) Heat Hot at all times Hot in run Hot in run or start Htr-a/c fuse 12 20a Hvac control assembly I/p fuse block (lower left kick panel) Ign e fuse 10a Low press sig Max Off Pnk Powertrain control module (pcm) (on left front inner fender) Request sig S202 (i/p harn, 7 cm into i/p relay center breakout) S215 (dash harn, 4 cm from radio breakout) Underhood fuse block (left side of engine compt) Vent 5.0L VIN M, Heater Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for 5.0L VIN M, Heater Wiring Diagram for Chevrolet Chevy Express G2002 3500: 47 (auxiliary) (if equipped) (left rear of cabin, behind rear wheelwell) (if equipped) (left rear of cabin, behind rear wheelwell) (left body harn, near chmsl) s400 (rear a/c harn, 13 cm from blower motor relay breakout) (rear a/c harn, 7 cm from blower motor breakout) (rear a/c harn, 7 cm from rear blower motor resistor breakout) Air temperature actuator (under dash, right side of hvac plenum) Assembly (if equipped) (left rear of cabin, behind rear wheelwell) Auxiliary blower motor Auxiliary blower motor resistor Auxiliary blower motor switch (if equipped) Blend Blower fuse 60a Blower motor (right rear of engine compt) Blower motor resistor assembly (right rear of engine compt, in blower motor housing) C2 f C202 Convenience center Def G103 (4.3l, 6.5l: generator bracket, 5.0l, 5.7l: rear of right cylinder head, 8.1l: rear of left cylinder head) G201 (behind left kick panel) G400 (left rear of vehicle) Heat High speed blower motor relay Hot at all times Hot in run Hot in run or start Htr-a/c fuse 12 20a Hvac control assembly I/p fuse block (lower left kick panel) Interior lights system Low speed blower motor relay Med Medium speed blower motor relay Off Red Rr blower fuse 30a Rr hvac fuse 24 10a S152 (gas) s101 (diesel) (in engine harness) S202 (dash harn, in i/p relay center) S215 (dash harn, 4 cm from hvac switch) S405 S412 S413 Tan Underhood fuse block (left side of engine compt) Vent 5.0L VIN M, Manual A/C Wiring Diagram, Cargo Van for Chevrolet Chevy Express G2002 3500 List of elements for 5.0L VIN M, Manual A/C Wiring Diagram, Cargo Van for Chevrolet Chevy Express G2002 3500: 71 (4.3l: gen bracket, 5.0l, 5.7l: rear of rt cyl head, 8.1l: rear of lft cyl head) g103 (if equipped) (left rear of cabin, behind rear wheelwell) (in refrigerant line) a/c low pressure switch (left body harn, 22 cm from front dome lamp breakout) (left body harn, near chmsl breakout) s400 (left rear of cabin, behind rear wheelwell) (rear a/c harn, 7 cm from blower mtr resistor breakout) s405 (under dash, right A/c A/c compressor clutch A/c compressor clutch relay (in underhood fuse block) A/c fuse 10a A/c high pressure switch (rear of a/c compressor) Air temperature actuator (auxiliary) (left rear interior) Auxiliary blower motor Auxiliary blower motor resistor Bi-lev Blend Blower fuse 60a Blower motor (right rear of engine compt) Blower motor resistor assembly (right rear of engine compt, in blower motor housing) C1 c C202 C3 d3 Clutch rly ctrl c2 Convenience center D3 c3 Def Diode (in underhood fuse block) G103 (4.3l generator bracket, 5.0l, 5.7l: rear of rt cylinder head, 8.1l: rear of left cylinder head) G201 (behind left kick panel) G400 (left rear of vehicle) Heat High speed blower motor relay (auxiliary) (if equipped) Hot at all times Hot in run Hot in run or start Htr-a/c fuse 12 20a Hvac control assembly Hvac control assembly (front auxiliary) (if equipped) I/p fuse block (lower left kick panel) Ign e fuse 10a Interior lights system Low press sig Low speed blower motor relay (auxiliary) (if equipped) Max Med Medium speed blower motor relay (auxiliary) (if equipped) Mode actuator (auxiliary) (left rear interior) Off Pnk Powertrain control module (pcm) (on left front inner fender) Red Request sig Rr blower fuse 30a Rr hvac fuse 24 10a S103 (in engine harn) S103 (in engine harness) S152 (in engine harness) S202 S202 (dash harn, in i/p relay center) S404 S411 (rear a/c harn, 5 cm from o/s air valve actuator breakout) S412 (rear a/c harn, 13 cm from blower motor relay breakout) S413 (rear a/c harn, 7 cm from rear blower motor resistor breakout) Side of hvac plenum) air temperature actuator Tan Temp Underhood fuse block (left side of engine compt) Vent Vent mode 5.0L VIN M, Manual A/C Wiring Diagram, Passenger Van for Chevrolet Chevy Express G2002 3500 List of elements for 5.0L VIN M, Manual A/C Wiring Diagram, Passenger Van for Chevrolet Chevy Express G2002 3500: 84 (4.3l: gen bracket, 5.0l, 5.7l: rear of rt cyl head, 8.1l: rear of lft cyl head) g103 (aux hvac harn, 13 cm from front hvac module breakout) (aux hvac harn, 13 cm from rear hvac module breakout) (aux hvac harn, 37 cm from front hvac module breakout) (aux hvac harn, 56 cm from front hvac module breakout) (dash harn, 4 cm from hvac switch) s215 (in engine harness) (in refrigerant line) a/c low pressure switch (left body harn, 22 cm from front dome lamp breakout) (left rear of cabin, behind rear wheelwell) (left rear of vehicle) g402 (rear a/c harn, 13 cm from blower motor relay breakout) (rear a/c harn, 5 cm from o/s air valve actuator breakout) (rear a/c harn, 7 cm from rear blower resistor breakout) (rear aux hvac harn, 29 cm from rear aux hvac module breakout) (under dash right A/c A/c compressor clutch A/c compressor enable relay (in underhood fuse block) A/c fuse 10a A/c high pressure switch (rear of a/c compressor) Auxiliary blower motor (behind left rear wheelhouse) Auxiliary blower motor resistor assembly (left rear of cabin, behind rear wheelwell) Bi-lev Blend Blower fuse 60a Blower motor (right rear of engine compt) Blower motor resistor assembly (right rear of engine compt, in blower motor housing) C1 c C202 Clutch rly ctrl Convenience center Def Diode (in underhood fuse block) G103 (4.3l generator bracket, 5.0l, 5.7l: rear of rt cylinder head, 8.1l: rear of left cylinder head) G201 (behind left kick panel) Heat High speed blower motor relay (auxiliary) Hot at all times Hot in run Hot in run or start Htr-a/c fuse 12 20a Hvac control assembly Hvac control assembly (front auxiliary) Hvac control assembly (rear auxiliary) Hvac control processor auxiliary) (front interior roof panel) I/p fuse block (lower left kick panel) Ign e fuse 10a Interior lights system Low press sig Low speed blower motor relay (auxiliary) Max Med Medium speed blower motor relay (auxiliary) Off Pnk Powertrain control module (pcm) (on left front inner fender) Rear auxiliary mode actuator (left rear interior) Rear auxiliary temperature actuator (left rear interior) Red Request sig Rr blower fuse 30a Rr ctrl Rr hvac fuse 24 10a S103 S103 (in engine harn) S152 (in engine harness) S202 (dash harn, in i/p relay center) S307 S318 S319 S320 S321 S404 S405 (rear a/c harn, 7 cm from blower resistor breakout) S412 S413 Side of hvac plenum) air temperature actuator Tan Temp Under- hood fuse block Underhood fuse block (left side of engine compt) Vent Vent mode
5.7L 5.7L VIN R, Compressor Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for 5.7L VIN R, Compressor Wiring Diagram for Chevrolet Chevy Express G2002 3500: 33 (4.3l: generator bracket, 5.0l, 5.7l: rear of right cylinder head, 8.1l: rear of left cylinder head) (in engine harness) A/c A/c compressor clutch A/c compressor clutch relay (in underhood fuse block) A/c compressor fuse 10a A/c high pressure switch (rear of a/c compressor) A/c low pressure switch (in refrigerant line) Bi-lev Blend Clutch rly ctrl Defrost Diode (in underhood fuse block) G103 G201 (behind left kick panel) Heat Hot at all times Hot in run Hot in run or start Htr-a/c fuse 12 20a Hvac control assembly I/p fuse block (lower left kick panel) Ign e fuse 10a Low press sig Max Off Pnk Powertrain control module (pcm) (on left front inner fender) Request sig S202 (i/p harn, 7 cm into i/p relay center breakout) S215 (dash harn, 4 cm from radio breakout) Underhood fuse block (left side of engine compt) Vent 5.7L VIN R, Heater Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for 5.7L VIN R, Heater Wiring Diagram for Chevrolet Chevy Express G2002 3500: 47 (auxiliary) (if equipped) (left rear of cabin, behind rear wheelwell) (if equipped) (left rear of cabin, behind rear wheelwell) (left body harn, near chmsl) s400 (rear a/c harn, 13 cm from blower motor relay breakout) (rear a/c harn, 7 cm from blower motor breakout) (rear a/c harn, 7 cm from rear blower motor resistor breakout) Air temperature actuator (under dash, right side of hvac plenum) Assembly (if equipped) (left rear of cabin, behind rear wheelwell) Auxiliary blower motor Auxiliary blower motor resistor Auxiliary blower motor switch (if equipped) Blend Blower fuse 60a Blower motor (right rear of engine compt) Blower motor resistor assembly (right rear of engine compt, in blower motor housing) C2 f C202 Convenience center Def G103 (4.3l, 6.5l: generator bracket, 5.0l, 5.7l: rear of right cylinder head, 8.1l: rear of left cylinder head) G201 (behind left kick panel) G400 (left rear of vehicle) Heat High speed blower motor relay Hot at all times Hot in run Hot in run or start Htr-a/c fuse 12 20a Hvac control assembly I/p fuse block (lower left kick panel) Interior lights system Low speed blower motor relay Med Medium speed blower motor relay Off Red Rr blower fuse 30a Rr hvac fuse 24 10a S152 (gas) s101 (diesel) (in engine harness) S202 (dash harn, in i/p relay center) S215 (dash harn, 4 cm from hvac switch) S405 S412 S413 Tan Underhood fuse block (left side of engine compt) Vent 5.7L VIN R, Manual A/C Wiring Diagram, Cargo Van for Chevrolet Chevy Express G2002 3500 List of elements for 5.7L VIN R, Manual A/C Wiring Diagram, Cargo Van for Chevrolet Chevy Express G2002 3500: 71 (4.3l: gen bracket, 5.0l, 5.7l: rear of rt cyl head, 8.1l: rear of lft cyl head) g103 (if equipped) (left rear of cabin, behind rear wheelwell) (in refrigerant line) a/c low pressure switch (left body harn, 22 cm from front dome lamp breakout) (left body harn, near chmsl breakout) s400 (left rear of cabin, behind rear wheelwell) (rear a/c harn, 7 cm from blower mtr resistor breakout) s405 (under dash, right A/c A/c compressor clutch A/c compressor clutch relay (in underhood fuse block) A/c fuse 10a A/c high pressure switch (rear of a/c compressor) Air temperature actuator (auxiliary) (left rear interior) Auxiliary blower motor Auxiliary blower motor resistor Bi-lev Blend Blower fuse 60a Blower motor (right rear of engine compt) Blower motor resistor assembly (right rear of engine compt, in blower motor housing) C1 c C202 C3 d3 Clutch rly ctrl c2 Convenience center D3 c3 Def Diode (in underhood fuse block) G103 (4.3l generator bracket, 5.0l, 5.7l: rear of rt cylinder head, 8.1l: rear of left cylinder head) G201 (behind left kick panel) G400 (left rear of vehicle) Heat High speed blower motor relay (auxiliary) (if equipped) Hot at all times Hot in run Hot in run or start Htr-a/c fuse 12 20a Hvac control assembly Hvac control assembly (front auxiliary) (if equipped) I/p fuse block (lower left kick panel) Ign e fuse 10a Interior lights system Low press sig Low speed blower motor relay (auxiliary) (if equipped) Max Med Medium speed blower motor relay (auxiliary) (if equipped) Mode actuator (auxiliary) (left rear interior) Off Pnk Powertrain control module (pcm) (on left front inner fender) Red Request sig Rr blower fuse 30a Rr hvac fuse 24 10a S103 (in engine harn) S103 (in engine harness) S152 (in engine harness) S202 S202 (dash harn, in i/p relay center) S404 S411 (rear a/c harn, 5 cm from o/s air valve actuator breakout) S412 (rear a/c harn, 13 cm from blower motor relay breakout) S413 (rear a/c harn, 7 cm from rear blower motor resistor breakout) Side of hvac plenum) air temperature actuator Tan Temp Underhood fuse block (left side of engine compt) Vent Vent mode 5.7L VIN R, Manual A/C Wiring Diagram, Passenger Van for Chevrolet Chevy Express G2002 3500 List of elements for 5.7L VIN R, Manual A/C Wiring Diagram, Passenger Van for Chevrolet Chevy Express G2002 3500: 84 (4.3l: gen bracket, 5.0l, 5.7l: rear of rt cyl head, 8.1l: rear of lft cyl head) g103 (aux hvac harn, 13 cm from front hvac module breakout) (aux hvac harn, 13 cm from rear hvac module breakout) (aux hvac harn, 37 cm from front hvac module breakout) (aux hvac harn, 56 cm from front hvac module breakout) (dash harn, 4 cm from hvac switch) s215 (in engine harness) (in refrigerant line) a/c low pressure switch (left body harn, 22 cm from front dome lamp breakout) (left rear of cabin, behind rear wheelwell) (left rear of vehicle) g402 (rear a/c harn, 13 cm from blower motor relay breakout) (rear a/c harn, 5 cm from o/s air valve actuator breakout) (rear a/c harn, 7 cm from rear blower resistor breakout) (rear aux hvac harn, 29 cm from rear aux hvac module breakout) (under dash right A/c A/c compressor clutch A/c compressor enable relay (in underhood fuse block) A/c fuse 10a A/c high pressure switch (rear of a/c compressor) Auxiliary blower motor (behind left rear wheelhouse) Auxiliary blower motor resistor assembly (left rear of cabin, behind rear wheelwell) Bi-lev Blend Blower fuse 60a Blower motor (right rear of engine compt) Blower motor resistor assembly (right rear of engine compt, in blower motor housing) C1 c C202 Clutch rly ctrl Convenience center Def Diode (in underhood fuse block) G103 (4.3l generator bracket, 5.0l, 5.7l: rear of rt cylinder head, 8.1l: rear of left cylinder head) G201 (behind left kick panel) Heat High speed blower motor relay (auxiliary) Hot at all times Hot in run Hot in run or start Htr-a/c fuse 12 20a Hvac control assembly Hvac control assembly (front auxiliary) Hvac control assembly (rear auxiliary) Hvac control processor auxiliary) (front interior roof panel) I/p fuse block (lower left kick panel) Ign e fuse 10a Interior lights system Low press sig Low speed blower motor relay (auxiliary) Max Med Medium speed blower motor relay (auxiliary) Off Pnk Powertrain control module (pcm) (on left front inner fender) Rear auxiliary mode actuator (left rear interior) Rear auxiliary temperature actuator (left rear interior) Red Request sig Rr blower fuse 30a Rr ctrl Rr hvac fuse 24 10a S103 S103 (in engine harn) S152 (in engine harness) S202 (dash harn, in i/p relay center) S307 S318 S319 S320 S321 S404 S405 (rear a/c harn, 7 cm from blower resistor breakout) S412 S413 Side of hvac plenum) air temperature actuator Tan Temp Under- hood fuse block Underhood fuse block (left side of engine compt) Vent Vent mode
ANTI-LOCK BRAKES Anti-lock Brake Wiring Diagrams for Chevrolet Chevy Express G2002 3500 List of elements for Anti-lock Brake Wiring Diagrams for Chevrolet Chevy Express G2002 3500: 55 (w/o 6.5l) (w/ 6.5) A13 Abs fuse 60a Abs ind Abs ind ground B17 Battery Brake fuse 18 10a Brake ind Brake ind input Brake pressure differential switch (on left frame rail, near center of vehicle) Brake sw input Computer data lines system Data link connector (dlc) (under left side of dash) Diagnostic sig Ebcm ground Electronic brake control module (ebcm) (on left frame rail, near center of vehicle) G101 (4.3l: left side of engine compt, near fender well) (5.0l, 5.7l, 6.5l diesel: near thermostat housing) (8.1l: rear of left cyl head) G102 (4.3l, 5.0l, 5.7l: at generator bracket) (6.5l diesel: at a/c compressor) (8.1l: rear of left cyl head) G103 (4.3l: at generator bracket) (5.ol, 5.7l: rear of right cyl head) (6.5l diesel: at generator bracket) (8.1l: rear of left cyl head) Gauges fuse 4 10a Hot at all times Hot in run Hot in run or start I/p fuse block (on left lower kick panel) Ignition Instrument cluster Left front wheel speed sensor Pnk Powertrain control module (pcm) (in engine compt, on left inner fender) Red Right front wheel speed sensor S101 S111 (w/ 6.5l) (3 cm from a/c compressor clutch breakout) S154 (w/o 6.5l) (97 cm from underhood fuse block, toward a/c compressor clutch) S156 (4.3l, 5.0l, 5.7l: engine harn, near fuel inj breakout) (6.5l: engine harn, near brake pressure switch breakout) (8.1l: engine harn, near vehicle speed sensor breakout) S171 s102 S216 S235 (i/p harn, near park brake warning switch breakout) Sensor high Sensor low Serial data Signal ground Tan Tcc/brake switch (behind dash, on brake pedal support) Underhood fuse block Underhood fuse block (on left side of engine compt) Vehicle speed sensor (vss) (on side of transmission) Vehicle speed sensor (vss) module (below dash, near steering column) Vss (+) Vss (-) Vss sig W/ 6.5l W/o 6.5l Warning systems
ANTI-THEFT Anti-theft Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for Anti-theft Wiring Diagram for Chevrolet Chevy Express G2002 3500: 49 (4.3l) (6.5l) (8.1l) (on rear of left cylinder head) g101 (diesel only) s247 (i/p harn, 21 cm left of hvac switch breakout) (engine harn) s153 (not used) 12v 4.3l 4.3l/ 6.5l 5 volt ref 5.0l/ 5.7l 5.0l/5.7l/ 8.1l 6.5l 8.1l B17 C8 serial data c3 Data link connector (under left side of dash) Diesel only Electronic brake control module (on left frame rail near center of vehicle) Fuel sender buffer module (below right side of dash, near knee bolster) G serial data c1 G101 (front of engine, near thermostat housing) (except 8.1l) Gauges fuse 4 10a Ground Hot at all times Hot in run or start I/p fuse block Ign Instrument cluster system Instrument panel cluster Passlck sig Passlock module (below center of dash) Passlock sensor (internal to steering column) Passlock signal Pnk Powertrain control module (behind center of dash) (left side of engine compt) Powertrain control module engine compt) (left side of Ref voltage S216 S246 (i/p harn, near instrument cluster) (diesel only) S254 Sec ind out Security fuse 21 10a Security indicator Sens ret Sensor ground Serial data Serial data c1 Switch breakout) s207
COMPUTER DATA LINES Computer Data Lines for Chevrolet Chevy Express G2002 3500 List of elements for Computer Data Lines for Chevrolet Chevy Express G2002 3500: 30 (4.3l, 5.0l & 5.7l) (8.1l) (on rear of left cylinder head g101 4.3l, 6.5l diesel only 4.3l, 8.1l gas 5.0l, 5.7l gas 5.0l, 5.7l gas only 6.5l diesel Abs serial data C210 Convenience center (under left side of dash) Data link connector (dlc) (under left side of dash) Electronic brake control module (ebcm) (on left frame rail near center of vehicle) G101 (front of eng, near thermostat housing) G201 (behind left kick panel) Hot at all times I/p fuse block Inflatable restraint sensing & diagnostic module (under left front seat) Passlock module (below center of dash) Powertrain control module (pcm) (behind center of dash) Prog signal Pwr aux fuse 7 25a Radio Remote control door lock receiver (rcdlr) (behind center of dash) S153 (6.5l: engine harn, 26 cm from a/c compressor clutch breakout S201 S218 S254 Serial data Toward the c100 breakout) (except 6.5l: engine harn, 8 cm from the
CRUISE CONTROL
4.3L 4.3L VIN W, Cruise Control Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for 4.3L VIN W, Cruise Control Wiring Diagram for Chevrolet Chevy Express G2002 3500: 40 A12 A13 A14 A15 Anti-lock brakes system Auto cruise Brake fuse 18 10a Cruise control module (front of engine compt, near left fender) Cruise control on/off switch Cruise fuse 6 10a Cruise on input Exterior lights system G101 (front of engine near thermostat housing) Ground Hot at all times Hot in run I/p fuse block (left lower kick panel) Ignition Instrument cluster system Off Pnk Powertrain control module (pcm) (left side of engine compt) R/a Resume/accel sig S/c S210 S231 (i/p harn, 24 cm into power seat breakout) S239 (i/p harn, 6 cm into power seat breakout) S253 (i/p harness, near park brake breakout) S254 Set/coast sig Speed sensor input Speed signal Stop fuse 1 20a Stoplamp sw input Tcc/brake switch (on brake pedal support) Vcm signal Vehicle speed sensor (vss) (on side of transmission) Vss high Vss low
5.0L 5.0L VIN M, Cruise Control Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for 5.0L VIN M, Cruise Control Wiring Diagram for Chevrolet Chevy Express G2002 3500: 40 A12 A13 A14 A15 Anti-lock brakes system Auto cruise Brake fuse 18 10a Cruise control module (front of engine compt, near left fender) Cruise control on/off switch Cruise fuse 6 10a Cruise on input Exterior lights system G101 (front of engine near thermostat housing) Ground Hot at all times Hot in run I/p fuse block (left lower kick panel) Ignition Instrument cluster system Off Pnk Powertrain control module (pcm) (left side of engine compt) R/a Resume/accel sig S/c S210 S231 (i/p harn, 24 cm into power seat breakout) S239 (i/p harn, 6 cm into power seat breakout) S253 (i/p harness, near park brake breakout) S254 Set/coast sig Speed sensor input Speed signal Stop fuse 1 20a Stoplamp sw input Tcc/brake switch (on brake pedal support) Vcm signal Vehicle speed sensor (vss) (on side of transmission) Vss high Vss low
5.7L 5.7L VIN R, Cruise Control Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for 5.7L VIN R, Cruise Control Wiring Diagram for Chevrolet Chevy Express G2002 3500: 40 A12 A13 A14 A15 Anti-lock brakes system Auto cruise Brake fuse 18 10a Cruise control module (front of engine compt, near left fender) Cruise control on/off switch Cruise fuse 6 10a Cruise on input Exterior lights system G101 (front of engine near thermostat housing) Ground Hot at all times Hot in run I/p fuse block (left lower kick panel) Ignition Instrument cluster system Off Pnk Powertrain control module (pcm) (left side of engine compt) R/a Resume/accel sig S/c S210 S231 (i/p harn, 24 cm into power seat breakout) S239 (i/p harn, 6 cm into power seat breakout) S253 (i/p harness, near park brake breakout) S254 Set/coast sig Speed sensor input Speed signal Stop fuse 1 20a Stoplamp sw input Tcc/brake switch (on brake pedal support) Vcm signal Vehicle speed sensor (vss) (on side of transmission) Vss high Vss low
DEFOGGERS Defogger Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for Defogger Wiring Diagram for Chevrolet Chevy Express G2002 3500: 32 (2 in) to right of 10 pin gray in-line connector) s245 (right rear corner of interior of cabin, "d" pillar) g401 C210 Convenience center (under left side of dash) Driver outside rear- view mirror Fixed glass Flex circuit G200 (behind left kick panel) G201 (behind left kick panel) Heated mirror pushbutton Hot at all times Hot in run Htd mir fuse 2 20a Htr-a/c fuse 12 20a Hvac control assembly I/p fuse block (on left lower kick panel) Latch Left rear window defogger grid Moving glass Passen- ger outside rear- view mirror) Rear window defogger relay (on bottom of left "b" pillar) Right rear window defogger grid Rr defog fuse 22 25a S202 S206 S215 S400 S429 S500 S601 S903 Solid state timer
ENGINE PERFORMANCE
4.3L 4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G2002 3500: 62 (i/p harn, 6 cm from park brake breakout) (lower front of engine, near crankshaft) crankshaft position sensor (near thermostat housing) g101 (top rear of engine) (under left side of dash) data link connector 12v ref 3-2 shift sol 5v ref Battery Camshaft position sensor (part of distributor, rear top of engine) Ckp sens Class2 data Cmp sensor Ecm-b fuse 20a Ect sensor Egr gnd Egr valve Eng-1 k7 Engine coolant temperature sensor (on top front of engine) F11 Fuse 20a l8 G103 (at generator bracket) G12 Ground Heated oxygen sensor bank 1 sensor 1 (in exhaust pipe in front of catalytic converter) Heated oxygen sensor bank 1 sensor 2 (in exhaust pipe in back of catalytic converter) Heated oxygen sensor bank 2 sensor 2 (w/ air injection reaction system) (in exhaust pipe in back of catalytic converter) Ho2s hi Ho2s low Hot at all times Hot in run or start Ign 1 Inj 1 Inj 2 Inj 3 Inj 4 Inj 5 Inj 6 Knock sensor Ks sig Low ref Nca Off/run/crk Pnk Powertrain control module (on left inner fender) Red Red c S101 S102 S120 S130 S152 S207 Solid state Tan Tcc bk sw Trans pres b Trans pres c Trans sw a Trans sw b Trans sw p Underhood fuse block 4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G2002 3500: 38 (w/4l60-e trans) (w/4l80-e trans) 1-2 shift solenoid 2-3 shift solenoid 3-2 shift solenoid A/t fluid pressure manual valve position switch Automatic transmission Ecm-1 fuse 20a Exhaust gas recirculation valve (top front of engine) Fluid temp sensor ground Fluid temp sensor signal Fuel inj 1 Fuel inj 2 Fuel inj 3 Fuel inj 4 Fuel inj 5 Fuel inj 6 Heated oxygen sensor bank 2 sensor 1 (in exhaust pipe in front of catalytic converter) Hot in run Hot in run or start I/p fuse block Ignition M4 brake fuse 18 10a n3 Nca Pnk Pressure control solenoid valve Red S132 S133 S139 S154 (engine harn, 97 cm from underhood fuse block) S210 Tan Tcc pcm solenoid valve Tcc solenoid vlave Tcc/brake switch (behind dash, on brake pedal support) Underhood fuse block W/4l60-e 4-speed trans only 4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G2002 3500: 50 (engine harn, 110 cm from underhood fuse block) (engine harn, left rear of engine compt) (i/p harn, 6 cm from power seat breakout) (left front of engine) g101 (near generator bracket) g103 87a Air fuse 30a B14 B17 Fuel lvl input Fuel pump & sender (in fuel tank under rear of vehicle) Fuel pump relay Fuel tank pressure sensor (in fuel tank) G101 (near thermostat housing) Gauges fuse 4 10a Hot at all times Hot in off, run or start Hot in run or start I/p fuse block Input Instrument cluster Instrument cluster system Malfunction indicator lamp (mil) "service engine soon" Manifold absolute pressure sensor (top right side of engine) Mass airflow sensor (part of air intake duct, top front of engine) Odometer speedometer/ Park/ neutral position switch Pnk Red S101 S102 S103 S119 S136 S152 S161 S162 S163 S164 S171 S216 S239 Secondary air injection reaction pump clutch Secondary air injection reaction pump relay Secondary air injection reaction solenoid Sig in Sig out Throttle position sensor (on left side of throttle body) Trans fuse 20 10a Underhood fuse block 4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G2002 3500: 65 (near generator bracket) g103 (near thermostat housing) g101 (top left side of engine) 1-2 shift 12v ref 2-3 shift A pnk A/c clutch A/c low A/c req A/c system Air pump Anti-lock brake system At iss hi At iss lo Automatic transmission input shaft speed sensor (w/4l80-e) (left side of transmission) Charge ind Cruise control system Cruise eng Distributor Eavp purge Egr sol Egr supp Evap vent Evaporative emission canister vent solenoid (on front of evap canister) Evaporative emissions canister purge solenoid valve (right side of engine) F pmp rly Fuel lev Gen f Gen to Ground High voltage coil wire Iac coil a Iac coil b Iat sens sig Ic timing Idle air control valve Ignition coil (top rear of engine) Ignition control module (top right side of engine, at ignition coil) Intake air temperature sensor (front of engine compartment, part of air intake duct) Low ref Maf sens Map sens Mil Pc sol Pnk Powertrain control module (on left inner fender) Pres sens Red S101 S102 Solid state Starting/charging system Tan Tan a Tcc pwm sol Tcc sol Tft sens Tp sens Trans a Trans c Vehicle speed sensor (right side of transmission) Vss Vss hi Vss low
5.0L 5.0L VIN M, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for 5.0L VIN M, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G2002 3500: 66 (i/p harn, 6 cm from park brake breakout) (lower left front of engine, near crankshaft) crankshaft position sensor (near thermostat housing) g101 (under left side of dash) data link connector 12v ref 3-2 shift sol 5v ref Battery Camshaft position sensor (part of distributor, rear top of engine) Ckp sens Class2 data Cmp sensor Computer data lines system Ecm-b fuse 20a Ect sensor Egr gnd Egr valve Eng-1 k7 Engine coolant temperature sensor (on top front of engine) F11 Fuse 20a l8 G103 (near generator bracket) G12 Ground Heated oxygen sensor bank 1 sensor 1 (in exhaust pipe in front of catalytic converter) Heated oxygen sensor bank 1 sensor 2 (in exhaust pipe in back of catalytic converter) Heated oxygen sensor bank 2 sensor 2 (5.7l 0nly) (in exhaust pipe in back of catalytic converter) Ho2s hi Ho2s low Hot at all times Hot in run or start Ign 1 Inj 1 Inj 2 Inj 3 Inj 4 Inj 5 Inj 6 Inj 7 Inj 8 Knock sensor (on right side of engine) Ks 1 Low ref Nca Off/run/crk Pnk Powertrain control module (on left inner fender) Red Red c S101 S102 S120 S130 S152 S207 Solid state Tan Tcc bk sw Trans pres b Trans pres c Trans sw a Trans sw b Trans sw p Underhood fuse block W/ 4l60 W/ 4l80 5.0L VIN M, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for 5.0L VIN M, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G2002 3500: 40 (w/4l60-e trans) (w/4l80-e trans) 1-2 shift solenoid 2-3 shift solenoid 3-2 shift solenoid A/t fluid pressure manual valve position switch Automatic transmission Ecm-1 fuse 20a Exhaust gas recirculation valve (top front of engine) Fluid temp sensor ground Fluid temp sensor signal Fuel inj 1 Fuel inj 2 Fuel inj 3 Fuel inj 4 Fuel inj 5 Fuel inj 6 Fuel inj 7 Fuel inj 8 Heated oxygen sensor bank 2 sensor 1 (in exhaust pipe in front of catalytic converter) Hot in run Hot in run or start I/p fuse block Ignition M4 brake fuse 18 10a n3 Nca Pnk Pressure control solenoid valve Red S132 S133 S139 S154 (engine harn, 97 cm from underhood fuse block) S210 Tan Tcc pcm solenoid valve Tcc solenoid vlave Tcc/brake switch (behind dash, on brake pedal support) Underhood fuse block W/4l60-e 4-speed trans only 5.0L VIN M, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for 5.0L VIN M, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G2002 3500: 49 (engine harn, left rear of engine compt) (i/p harn, 6 cm from power seat breakout) (near generator bracket) g103 (near thermostat housing) g101 87a Air fuse 30a B14 B17 Fuel lvl input Fuel pump & sender (in fuel tank under rear of vehicle) Fuel pump relay Fuel tank pressure sensor (in fuel tank) G101 (near thermostat housing) Gauges fuse 4 10a Hot at all times Hot in off, run or start Hot in run or start I/p fuse block Input Instrument cluster Instrument cluster system Malfunction indicator lamp (mil) "service engine soon" Manifold absolute pressure sensor (top right side of engine) Mass airflow sensor (part of air intake duct, top front of engine) Odometer speedometer/ Park/ neutral position switch Pnk Red S101 S102 S103 S119 S152 S161 S162 S163 S164 S165 S171 S216 S239 Secondary air injection reaction pump clutch Secondary air injection reaction pump relay Secondary air injection reaction solenoid Sig in Sig out Throttle position sensor (on side of throttle body) Trans fuse 20 10a Underhood fuse block 5.0L VIN M, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for 5.0L VIN M, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G2002 3500: 65 (near generator bracket) g103 (near thermostat housing) g101 (top left side of engine) 1-2 shift 12v ref 2-3 shift A pnk A/c clutch A/c low A/c req A/c system Air pump Anti-lock brake system At iss hi At iss lo Automatic transmission input shaft speed sensor (w/4l80-e) (left side of transmission) Charge ind Cruise control system Cruise eng Distributor Eavp purge Egr sol Egr supp Evap vent Evaporative emission canister vent solenoid (california) (on left frame rail, near fuel tank) Evaporative emissions canister purge solenoid valve (right side of engine) F pmp rly Fuel lev Gen f Gen to Ground High voltage coil wire Iac coil a Iac coil b Iat sens sig Ic timing Idle air control valve Ignition coil (top right side of engine) Ignition control module (top right side of engine, at ignition coil) Intake air temperature sensor (front of engine compartment, part of air intake duct) Low ref Maf sens Map sens Mil Pc sol Pnk Powertrain control module (on left inner fender) Pres sens Red S101 S102 Solid state Starting/charging system Tan Tan a Tcc pwm sol Tcc sol Tft sens Tp sens Trans a Trans c Vehicle speed sensor (on side of transmission) Vss Vss hi Vss low
5.7L 5.7L VIN R, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G2002 3500: 66 (i/p harn, 6 cm from park brake breakout) (lower left front of engine, near crankshaft) crankshaft position sensor (near thermostat housing) g101 (under left side of dash) data link connector 12v ref 3-2 shift sol 5v ref Battery Camshaft position sensor (part of distributor, rear top of engine) Ckp sens Class2 data Cmp sensor Computer data lines system Ecm-b fuse 20a Ect sensor Egr gnd Egr valve Eng-1 k7 Engine coolant temperature sensor (on top front of engine) F11 Fuse 20a l8 G103 (near generator bracket) G12 Ground Heated oxygen sensor bank 1 sensor 1 (in exhaust pipe in front of catalytic converter) Heated oxygen sensor bank 1 sensor 2 (in exhaust pipe in back of catalytic converter) Heated oxygen sensor bank 2 sensor 2 (5.7l 0nly) (in exhaust pipe in back of catalytic converter) Ho2s hi Ho2s low Hot at all times Hot in run or start Ign 1 Inj 1 Inj 2 Inj 3 Inj 4 Inj 5 Inj 6 Inj 7 Inj 8 Knock sensor (on right side of engine) Ks 1 Low ref Nca Off/run/crk Pnk Powertrain control module (on left inner fender) Red Red c S101 S102 S120 S130 S152 S207 Solid state Tan Tcc bk sw Trans pres b Trans pres c Trans sw a Trans sw b Trans sw p Underhood fuse block W/ 4l60 W/ 4l80 5.7L VIN R, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G2002 3500: 40 (w/4l60-e trans) (w/4l80-e trans) 1-2 shift solenoid 2-3 shift solenoid 3-2 shift solenoid A/t fluid pressure manual valve position switch Automatic transmission Ecm-1 fuse 20a Exhaust gas recirculation valve (top front of engine) Fluid temp sensor ground Fluid temp sensor signal Fuel inj 1 Fuel inj 2 Fuel inj 3 Fuel inj 4 Fuel inj 5 Fuel inj 6 Fuel inj 7 Fuel inj 8 Heated oxygen sensor bank 2 sensor 1 (in exhaust pipe in front of catalytic converter) Hot in run Hot in run or start I/p fuse block Ignition M4 brake fuse 18 10a n3 Nca Pnk Pressure control solenoid valve Red S132 S133 S139 S154 (engine harn, 97 cm from underhood fuse block) S210 Tan Tcc pcm solenoid valve Tcc solenoid vlave Tcc/brake switch (behind dash, on brake pedal support) Underhood fuse block W/4l60-e 4-speed trans only 5.7L VIN R, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G2002 3500: 49 (engine harn, left rear of engine compt) (i/p harn, 6 cm from power seat breakout) (near generator bracket) g103 (near thermostat housing) g101 87a Air fuse 30a B14 B17 Fuel lvl input Fuel pump & sender (in fuel tank under rear of vehicle) Fuel pump relay Fuel tank pressure sensor (in fuel tank) G101 (near thermostat housing) Gauges fuse 4 10a Hot at all times Hot in off, run or start Hot in run or start I/p fuse block Input Instrument cluster Instrument cluster system Malfunction indicator lamp (mil) "service engine soon" Manifold absolute pressure sensor (top right side of engine) Mass airflow sensor (part of air intake duct, top front of engine) Odometer speedometer/ Park/ neutral position switch Pnk Red S101 S102 S103 S119 S152 S161 S162 S163 S164 S165 S171 S216 S239 Secondary air injection reaction pump clutch Secondary air injection reaction pump relay Secondary air injection reaction solenoid Sig in Sig out Throttle position sensor (on side of throttle body) Trans fuse 20 10a Underhood fuse block 5.7L VIN R, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G2002 3500: 65 (near generator bracket) g103 (near thermostat housing) g101 (top left side of engine) 1-2 shift 12v ref 2-3 shift A pnk A/c clutch A/c low A/c req A/c system Air pump Anti-lock brake system At iss hi At iss lo Automatic transmission input shaft speed sensor (w/4l80-e) (left side of transmission) Charge ind Cruise control system Cruise eng Distributor Eavp purge Egr sol Egr supp Evap vent Evaporative emission canister vent solenoid (california) (on left frame rail, near fuel tank) Evaporative emissions canister purge solenoid valve (right side of engine) F pmp rly Fuel lev Gen f Gen to Ground High voltage coil wire Iac coil a Iac coil b Iat sens sig Ic timing Idle air control valve Ignition coil (top right side of engine) Ignition control module (top right side of engine, at ignition coil) Intake air temperature sensor (front of engine compartment, part of air intake duct) Low ref Maf sens Map sens Mil Pc sol Pnk Powertrain control module (on left inner fender) Pres sens Red S101 S102 Solid state Starting/charging system Tan Tan a Tcc pwm sol Tcc sol Tft sens Tp sens Trans a Trans c Vehicle speed sensor (on side of transmission) Vss Vss hi Vss low
EXTERIOR LIGHTS Back-up Lamps Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for Back-up Lamps Wiring Diagram for Chevrolet Chevy Express G2002 3500: 16 Back-up lamp switch (park/neutral position switch) (left side of transmission) D c406 G400 (left rear corner of interior of cabin "d" pillar) G401 (right rear corner of interior of cabin "d" pillar) Hot in run or start I/p fuse block I/p harness, near breakout to convenience center) s260 Left back-up lamp Mirrors system Pnk Right back-up lamp S217 S409 S909 S910 Turn b/u fuse 16 20a Exterior Lamps Wiring Diagram, with Composite Headlamps for Chevrolet Chevy Express G2002 3500 List of elements for Exterior Lamps Wiring Diagram, with Composite Headlamps for Chevrolet Chevy Express G2002 3500: 68 (forward lamp harn, 25 cm into left forward lamp harness) s142 (forward lamp harness, 26 cm from left forward lamp breakout) s135 (i/p harness, near the hvac switch breakout) s225 (not used) A10 B c406 B9 turn pwr b8 haz pwr b7 flshr out c8 gnd Center high mounted stop lamp (chmsl) Cruise control system F c406 G108 (left side of engine compt, near fender well) G109 (right side of engine compt, near fender well) G201 (behind left kick panel) G400 (left rear corner of interior of cabin "d' pillar) G401 (right rear corner of interior of cabin "d' pillar) Haz sw Hazard Hazard fuse 20a Head Headlamp switch Hot at all times Hot in run or start I/p fuse block I/p relay center (under left side of dash) Instru- ment panel cluster Interior lights system Left Left front inner park/ turn signal lamp Left front marker lamp Left front outer park/ turn signal lamp Left rear park/ turn signal lamp Left tail lamp Left turn ind License lamp Multi- function switch Normal Off Park Park lps fuse 9 20a Pnk Right Right front inner park/ turn signal lamp Right front marker lamp Right front outer park/ turn signal lamp Right rear park/ turn signal lamp Right tail lamp Right turn ind S110 S118 S125 (in i/p harn, in left rear of engine compt, near the bulkhead) S145 (forward lamp harness, 15 cm into right forward lamps breakout) S183 (in i/p harn, in left rear of engine compt, near the bulkhead) S202 S217 S222 S253 S400 S402 (left body harn, behind right taillamp assembly) S903 S909 S910 Stop fuse 20a Tcc/ brake switch (behind dash, on brake pedal support) Tn sw Turn- b/u fuse 16 20a Turn/hazard lamp flasher W/ optional trailer wiring package W/ optional trailer wiring package) Exterior Lamps Wiring Diagram, with Sealed Beam Headlamps for Chevrolet Chevy Express G2002 3500 List of elements for Exterior Lamps Wiring Diagram, with Sealed Beam Headlamps for Chevrolet Chevy Express G2002 3500: 68 (forward lamp harn, 25 cm into left forward lamp harness) s142 (forward lamp harness, 26 cm from left forward lamp breakout) (i/p harness, near the hvac switch breakout) s225 (not used) A10 B c406 B9 turn pwr b8 haz pwr b7 flshr out c8 gnd Center high mounted stop lamp (chmsl) Cruise control system F c406 G108 (left side of engine compt, near fender well) G109 (right side of engine compt, near fender well) G201 (behind left kick panel) G400 (left rear corner of interior of cabin "d" pillar) G401 (right rear corner of interior of cabin "d" pillar) Haz sw Hazard Hazard fuse 20a Head Headlamp switch Hot at all times Hot in run or start I/p fuse block I/p relay center (under left side of dash) Instru- ment panel cluster Interior lights system Left Left front park/turn signal lamp Left front side marker lamp Left rear park/ turn signal lamp Left tail lamp Left turn ind License lamp Multi- function switch Normal Off Park Park lps fuse 9 20a Pnk R100 (resistor) (6 ohms, 30 watts) Right Right front park/turn signal lamp Right front side marker lamp Right rear park/ turn signal lamp Right tail lamp Right turn ind S110 S118 S125 (in i/p harn, in left rear of engine compt, near the bulkhead) S135 S145 (forward lamp harness, 15 cm into right forward lamps breakout) S183 (in i/p harn, in left rear of engine compt, near the bulkhead) S202 S217 S222 S253 S400 S402 (left body harn, behind right taillamp assembly) S903 S909 S910 Stop fuse 20a Tcc/ brake switch (behind dash, on brake pedal support) Tn sw Turn- b/u fuse 16 20a Turn/hazard lamp flasher W/ optional trailer wiring package W/ optional trailer wiring package)
GROUND DISTRIBUTION Ground Distribution Wiring Diagram (1 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for Ground Distribution Wiring Diagram (1 of 4) for Chevrolet Chevy Express G2002 3500: 93 (forward lamp harness, approx 19 cm into left forward lamp breakout) (forward lamp harness, approx 21 cm into right forward lamp breakout) (i/p harness, approx 7 cm from i/p relay center breakout) (lower i/p harness, approx 7 cm into i/p compartment lamp breakout) (sun shade harness, approx 7 cm from right sun shade breakout) (w/ upfitter provisions) 31a A/t shift lock solenoid A12 Accessory power outlet Air temperature actuator Auxiliary battery (diesel) Auxiliary blower motor Auxiliary blower motor switch Battery C200 C202 C210 Cigar lighter Convenience center Convenience center (left side of dash) Coolant level module (diesel) Coolant level switch (diesel) Cruise test resistor connector Cruise test resistor connector (school bus only) b Data link connector Daytime running lamp (drl) control module Door jamb switch Door lock control module Door lock relay Driver seat adjuster switch E13 Fog lamp switch Front passenger seat adjuster switch G100 (right side of engine compt, near fender well) G104 (right frame rail, near front of engine) G105 (right lower front of engine) G108 (left side of engine compt, near fender well) G109 (right side of engine compt, near fender well) G112 (left side of engine compt, under brake master cylinder) G200 (behind left kick panel) G201 (behind left kick panel) G300 (left frame rail, near auxiliary battery) G301 (in cutaway body harn, near tail lamp breakout) Headlamp leveling switch Headlamp switch Hvac control assembly I/p compartment lamp I/p relay block Ignition switch Instrument panel cluster (ipc) Interior lamp control module Left fog lamp Left front marker lamp Left front park/turn signal lamp Left headlamp (w/ sealed beam headlamps) Left headlamp leveling actuator Left high beam headlamp (w/ composite headlamps) Left low beam headlamp (w/ composite headlamps) Left rear fog lamp Left vanity mirror lamp Multi- function alarm module Nca Power brake (p/b) booster fluid alarm switch Radio Rear fog lamp switch Remote control door lock receiver Right fog lamp Right front marker lamp Right front park/turn signal lamp Right headlamp (w/ sealed beam headlamps) Right high beam headlamp (w/ composite headlamps) Right low beam headlamp (w/ composite headlamps) Right vanity mirror lamp S150 (approx 12 cm from left forward lamp breakout) S201 (i/p harness, approx 4 cm from park brake warning switch breakout) S202 S204 S205 S206 (crossbody harness, approx 22 cm from power door lock relay breakout) S257 (power seat harn, under left side of dash) S328 (cutaway provision body harn, approx 80 cm from taillamp breakout) School bus equipment Seat belt switch Steering column ground To s500 or left front door jamb switch (diagram 2 of 4) To s601 or right front door jamb switch (diagram 2 of 4) Turn signal/ hazard flasher module Upfitter provisions relay W/ upfitter provisions W/o keyless entry Windshield washer pump motor Windshield wiper motor Ground Distribution Wiring Diagram (2 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for Ground Distribution Wiring Diagram (2 of 4) for Chevrolet Chevy Express G2002 3500: 68 (at generator bracket) g103 (engine harness, approx 10 cm from a/c compressor breakout) (i/p harness, approx 8 cm from bulkhead connector breakout) (left front door harness, approx 7 cm from power window switch breakout) (right front door harness, approx 7 cm from power window switch breakout) A/c compressor clutch A18 Ambulance package B13 Base Blower motor resistor assembly Brake pressure differential switch C206 C302 Center dome/ reading lamps Data link connector (dlc) Diesel engines Diode Driver door jamb switch Driver door lock switch Driver outside rear view mirror Driver window switch Electronic brake control module (ebcm) Fog lamp relay From s206 (diagram 1 of 4) Front passenger door jamb switch Front passenger power door lock switch Front passenger power window switch Front reading lamps Fuel heater Fuel pump Fuel pump relay Fuel sender buffer module Fuse block G101 (front of engine, near thermostat housing) G102 (left front of engine at a/c compressor) G106 (left side of safety wall) G202 (behind left kick panel) Garage door opener Glow plug relay Horn assembly Inflatable restraint sensing & diagnostic module Inside rear view mirror Instrument panel cluster (ipc) Nca Non base Outside rearview mirror switch Park/ neutral position switch Passenger outside rearview mirror Passlock module Powertrain control module (pcm) Rear dome/ reading lamps Rsa-t module S101 (engine harness, approx 10 cm from a/c compressor breakout) S102 S254 S322 (upfitters provisions harn, approx 29 cm from upfitter provision relay) S330 (in entertainment harn, approx 20 cm from rsa-t module breakout) Starter relay Switch amp power relay Underhood fuse block Underhood lamp Upfitters provisions Vehicle speed sensor buffer W/ nb6 W/ upfitter provisions W/o nb6 Water-in- fuel sensor Ground Distribution Wiring Diagram (3 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for Ground Distribution Wiring Diagram (3 of 4) for Chevrolet Chevy Express G2002 3500: 64 (4.3l, 5.ol & 5.7l) (8.1l) (8.1l: eng harn, 6 cm from a/c compressor high pressure cutoff switch breakout, 4.3l, 50l & 5.7l: eng harn, 4 cm from a/c compressor clutch breakout, toward transmission) 4.3l & 5.7l 4.3l 5.0l 5.7l 4.3l, 5.0l, 5.7l a 8.1l 8.1l eng w/ electronic reactor system air injection A b 8.1l A/c compressor clutch A/c low pressure switch Actuator control (tac) module B13 Blower motor resistor assembly Brake pressure differential switch Cruise control module Data link connector (dlc) Diode Electronic brake control module (ebcm) Except 8.1l Except 8.1l eng w/ electronic reactor system air injection Fuel pump & sender assembly Fuel pump relay G101 (front of engine, near thermostat housing) G101 (on rear of left cylinder head) G102 (eng harn, 4.3l, 5.0l & 5.7l: near generator bracket, 8.1l: on rear of left cylinder head) G103 (5.ol & 5.7l: rear of right cylinder head, 8.1l: rear of left cylinder head, 4.3l: near generator bracket) Gasoline engines Heated oxygen sensor (ho2s) bank 1 sensor 1 Heated oxygen sensor (ho2s) bank 1 sensor 2 Heated oxygen sensor (ho2s) bank 2 sensor 1 Heated oxygen sensor (ho2s) bank 2 sensor 2 Horn assembly Ignition coil 1 Ignition coil 2 Ignition coil 3 Ignition coil 4 Ignition coil 5 Ignition coil 6 Ignition coil 7 Ignition coil 8 Ignition control module (icm) Instrument panel cluster (ipc) Mass air flow (maf) sensor Nca Park/ neutral position switch Passlock module Powertrain control module (pcm) S101 (4.3l, 5.0l & 5.7l: eng harn, 21 cm from ignition coil breakout, toward ebcm, 8.1l: eng harn, 13 cm from crankshaft position breakout) S102 (8.1l- approx 5 cm from a/c compressor clutch breakout, ex 8.1l- approx 104 cm from underhood fuse block, toward a/c compressor clutch breakout) S103 S152 (4.3l: eng harn, 26 cm from icm breakout, 8.1l: eng harn, 38 cm from generator breakout) S171 (8.1l- approx 104 cm from underhood fuse block, ex 8.1l- approx 60 cm from underhood fuse block, toward a/c compressor clutch breakout) S183 S184 S254 (i/p harn, approx 8 cm from bulkhead connector breakout, toward instrument cluster) Secondary air injection (air) pump Secondary air injection (air) solenoid Starter relay Throttle Underhood fuse block Underhood lamp W/ hydra-matic 4l60-e or 4.3l w/ hydra-matic 4l80-e c W/ hydra-matic 4l80-e b Ground Distribution Wiring Diagram (4 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for Ground Distribution Wiring Diagram (4 of 4) for Chevrolet Chevy Express G2002 3500: 56 (axiliary heater & a/c harn, 13 cm from front auxiliary hvac control assembly breakout) s318 (entertainment harn, 7.5 cm from, rsa-t module breakout) (rear a/c harn, approx 5 cm from outside air valve actuator breakout) s411 Auxiliary air temperature actuator Auxiliary blower motor Auxiliary blower motor switch Auxiliary hvac control processor Auxiliary mode actuator Back-up lamp Bare Bose amp Cargo Center high mounted stoplamp Chmsl connector breakout) Front 100w amp Front audio circuits to bose 2000 amp amplifier 1 Front auxiliary hvac control assembly G203 (behind left kick panel) G302 (right "b" pillar) G303 (left "b" pillar) G304 (right rear wheel well) G400 (left rear corner of interior of cabin, "d" pillar) G401 (right rear corner of the interior of the cabin, "d" pillar) Left back-up lamp Left rear fog lamp Left rear park/turn signal lamp Left rear window defogger grid Left tail/ stop lamp License lamp Passenger Rear 100w amp Rear accessory power outlet b Rear audio circuits rsa-t to bose 2000 amp ampllifiers Rear audio circuits to bose 2000 amp amplifier 1 Rear audio circuits to bose 2000 amp amplifier 2 Rear audio circuits to rsa-t Rear auxiliary hvac control assembly Rear window defogger relay Rear woofer Right back-up lamp Right rear door jamb switch Right rear park/turn signal lamp Right rear window defogger grid Right tail/stop lamp S331 (entertainment harn, 16cm from first bose amplifier breakout) S394 bare S400 (left body harn, 33 cm from a connector breakout toward chmsl connector breakout) S902 (rear license lamp jumper near right license lamp) S903 (right rear door harn, approx 29 cm from the door jamb switch breakout) S909 (right taillight harn, near back-up lamp breakout) S910 (near back-up lamp breakout) Shield for radio audio outputs W/ auxiliary heater W/ auxiliary heater or wiring provisions W/ rear a/c Wiring provisions
HEADLIGHTS Headlight Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for Headlight Wiring Diagram for Chevrolet Chevy Express G2002 3500: 88 (12.5 cm into left parking lamp breakout) s112 (approx 10 cm from park brake warning switch breakout) (forward lamp harn, approx 13 cm from left forward lamp breakout toward right forward lamp breakout) s143 (in drl module breakout) (in fog lamp switch breakout) (right side of engine compt) 17a A13 A17 Acc B17 Bat pwr Brake indicator Brake warning C200 Composite headlamps Daytime running lamps control module (under left side of dash, taped to dash harness) Drl fuse 15 15a Drl indicator Drl relay ctrl E11 c200 E12 E13 F f Fog lamp relay Fog lamp switch Fog light fuse 10a Foglamp enable relay (taped to harness near fog lamp switch) G106 (left side of safety wall) G108 (left side of engine compt) G109 G109 (right side of engine compt) G201 (behind left kick panel) Gauges fuse 4 10a Ground Head Headlamp dimmer switch Headlamp switch High beam indicator High beam out Hot at all times Hot in run or start I/p fuse block (on left lower kick panel) Ign (run/st) Ignition switch Illum Indicator Instrument panel cluster (ipc) Interior lights system Left fog lamp Left headlamp high beam/ headlamp low beam Left high beam headlamp Left low beam headlamp Lighting fuse 40a Lock Low beam out Nca Off Park Park brake in Park brake switch (near left kick panel, on park brake lever) Pnk Rear fuse block (rear of driver door) Red Right fog lamp Right headlamp high beam/ headlamp low beam Right high beam headlamp Right low beam headlamp Run S110 S118 S143 (forward lamp harn, approx 13 cm from left forward lamp breakout toward right forward lamp breakout) S144 (forward lamp harn, approx 19 cm from left forward lamp breakout) S202 S211 S216 S234 (i/p harn, 8 cm toward park brake warning switch breakout) S235 S255 (29 cm from hvac switch breakout) S256 (7 cm into steering column harn breakout) S261 S262 S330 Sealed beam headlamps Start Tan Underhood fuse block (on left side of engine compt) Warning systems
HORN Horn Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for Horn Wiring Diagram for Chevrolet Chevy Express G2002 3500: 18 (not used) A11 C100 C200 G103 (at generator bracket) Gasoline diesel Horn brush Horn fuse 20a Horn relay Horn switch Horns (left front of engine compt) Hot at all times Nca S103 s101 S127 Turn signal switch Underhood fuse/relay center Underhood fuse/relay center (left side of engine compt)
INSTRUMENT CLUSTER Instrument Cluster Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2002 3500 List of elements for Instrument Cluster Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2002 3500: 113 (7 bulbs) (dash harness, 10 cm parking brake warning switch breakout) s235 (diesel only) (eng harn, 4.3l/5.0/5.7l: 10 cm from injector harn breakout, 8.1l: 10 cm from vehicle speed sensor, 6.5l: 4 cm from brake pressure sw breakout) (gas) (not used) 8.1l A10 A11 A12 A13 A14 A15 A16 A17 Acc Air bag ind Anti-lock brakes system Anti-lock brakes warning ind Anti-theft system B10 B11 B12 B13 B14 B15 B16 B17 Bat ind Brake ind ctl Brake lamp ctl Brake pressure differential switch (left frame rail near center of vehicle, part of electronic brake control module) Brake warning ind Check gauges ind Coolant level module (diesel only) (behind left side of dash) Coolant level switch (diesel only) (under coolant recovery/ surge tank) Daytime running lamps control module (under left side of dash, taped to harness) Diesel only Dimmimg signal Diode d101 Drl lamp ind Electronic brake control module (ebcm) (left framerail, near center of vehicle) Eng-i mini fuse 20a Engine controls system Engine coolant temperature sensor (on right side of engine) Engine coolant temperature sensor (on top front of engine) Except 8.1l Exterior lights system Fuel gauge G101 (front of engine, near thermostat housing) G103 (5.ol & 5.7l: rear of right cylinder head, 8.1l: rear of left cylinder head, 4.3l: near generator bracket) G103 (diesel) (at generator bracket) G109 (right side of engine compt, near fender well) G201 (behind left kick panel) Gauges fuse 4 10a Gnd Ground Headlights system High beam ind Hot in run or start I/p fuse block (lower left kick panel) I/p lamp voltage Ign Ign 1 Ign 1 volt Ign feed Ignition switch Illumin- ation lamps Ind ctrl Instrument cluster Interior lights system Led Left turn ind Lock Logic Low coolant ind (diesel) Odometer Off Oil pressure gauge Park/neutral position switch (left side of transmission) Pk brake Pnk Prnd Right turn ind Run S101 S118 S130 S156 S201 S202 S216 S254 Safety belt ind Security ind Service engine soon ind Service throttle soon ind (diesel) Speedo- meter Start Starting/charging system Tan Temp gauge Tr sw a Tr sw b Tr sw c Tr sw p Underhood fuse block (left side of eng compt) Underhood fuse/relay center (on left side of engine compt) Volt- meter Wait to start ind (diesel) Warning system Water in fuel ind (diesel) Water-in-fuel sensor (diesel only) (left frame rail, near center of vehicle) Instrument Cluster Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2002 3500 List of elements for Instrument Cluster Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2002 3500: 63 (below right side of dash, near knee bolster) (diesel only) (eng harn, 4.3l: 110 cm from underhood fuse/ relay center, 5.0l, 5.7l: 65 cm from a/c compressor clutch breakout, 8.1l: 6 cm from a/c compressor high pressure cutoff switch breakout) (i/p harn, 6 cm into power seat breakout) (i/p harn, approx 21 cm from hvac switch breakout) s247 +5v ref 1.5k Anti-lock brakes system Brake fuse 18 10a C301 Diesel Engine controls system Engine oil pressure sensor (top rear of engine) Fuel level Fuel pump & sender assembly (in fuel tank) Fuel sender buffer module Fuel sig Fuel tank & level sender assembly (in fuel tank) G101 (front of engine, near thermostat housing) G112 (left side of engine compt, under brake master cylinder) Gasoline Gnd Hot in acc or run Hot in off run or start I/p fuse block (lower left kick panel) Ign Ignition Inline diode d202 (near park brake switch) Low flow Low pres. Low ref P/b booster fluid flow & pressure alarm delay module P/b booster fluid flow alarm P/b booster fluid pressure alarm switch Park brake warning switch Passlock module (behind center of dash) Pnk Power brake (p/b) booster fluid flow alarm switch Powertrain control module (behind center of dash) Powertrain control module (in engine compt on left inner fender) Prim sig Radio Resistor r208 (w/ uj1) (near i/p fuse block) S136 S210 S238 (i/p harn, 23 cm into passlock module breakout) S239 S246 (i/p harn, approx 25 cm from hvac switch breakout) S254 Sens gnd Speed sig Sw sense Tan Tank signal Trans fuse 20 10a Twisted pair Vehicle speed sensor (left side of transmission) Vehicle speed sensor buffer (diesel only) (below dash, near steering column) Vss high Vss low Vss out Vss sen W/ p/b booster warning option, rpo code-uj1
INTERIOR LIGHTS Interior Light Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2002 3500 List of elements for Interior Light Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2002 3500: 84 (base: body harn, approx 37 cm to rear of front dome lamp breakout) (behind center of dash) (behind center of dash) remote control door lock reciever (behind left kick panel) (body harn, approx 6 cm to rear of front dome lamp breakout) (crossbody harn, 9 cm to right of in-line conn breakout, toward convenience center breakout) (front crossbody harn, approx 23 cm from right kick panel) (i/p harn, 4 cm (i/p harn, 9 cm from breakout to headlamp switch) s226 (left front door harn) s501 (right front door harn) s603 (upfitter: body harn, approx 46 cm from convenience center breakout) A nca Ash- tray lamp Battery Bright adjust C1 c210 Center dome & reading lamp Con- venience center Ctsy fuse 3 20a Dome lamp Dome lamp override switch Dome switch Door lock control module (on left kick panel) Dr jamb sw Driver door lock switch Driver window switch E8 c202 From breakout to hvac controls) Front dome & reading lamp Front pasenger door lock switch Front passenger window switch G200 (behind left kick panel) G201 G201 (behind left kick panel) G401 (right rear corner of the interior of the cabin "d" pillar) Gauges fuse 4 10a Ground Headlamp switch Hot at all times Hot in run & start I/p compart- ment lamp I/p fuse block Ignition Interior lamp control module (on right lower kick panel) Lamp Left front door jamb switch Left front stepwell lamp Left vanity mirror lamp Nca Parade mode switch Park lps fuse 9 20a Park switch Pnk Pwr accy fuse a 25a Reading lamps Rear dome & reading lamp Rear door jamb switch Right front door jamb switch Right front stepwell lamp Right side stepwell lamp Right vanity mirror lamp S201 S204 S205 S206 S216 S225 S227 S228 S230 S232 S240 S306 S308 (sunshade illuminated mirror harn, 7 cm from right sunshade breakout) S406 S903 Side door jamb switch To i/p fuse block (diagram 2 of 2) To s224 (diagram 2 of 2) W/ power door locks W/ rke W/o power door locks W/o rke Interior Light Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2002 3500 List of elements for Interior Light Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2002 3500: 64 (8.1l) (auxiliary heat w/ a/c) (auxiliary heat) (diesel) (entertainment harn, approx 22 cm from left "b" pillar) s337 (exc 8.1l) (gasoline) (gasoline) (diesel) (i/p harn, 4 cm from breakout to headlamp switch) (passenger) Auxiliary blower motor switch B10 B12 B13 B6 ground b8 ground c3 Fog lamp switch From headlamp switch (diagram 1 0f 2) Front auxiliary hvac control assembly G101 (front of engine, near thermostat housing) G101 (on rear of left cylinder head) G103 (5.ol & 5.7l: rear of right cylinder head, 8.1l: rear of left cylinder head, 4.3l & 6.5l: near generator bracket) G106 (left side of safety wall) G201 (behind left G201 (behind left kick panel) G400 (left rear corner of interior of cabin, "d" pillar) Game box (slt & lt) Garage door opener (slt & lt) Ground c5 Ground ground c1 Horn fuse 20a Hot at all times Hot in accy & run Hot in off, run & start Hvac control assembly I/p fuse block Illum fuse 14 10a Instrument cluster Kick panel) Nca Odometer Pnk Prndl Radio Radio-i fuse 17 10a Rear auxiliary hvac control assembly Rsa control (slt & lt) Rsa-t module (slt & lt models) S102 S103 S127 S152 s101 S171 S201 S202 S220 S223 (i/p harn, approx 17 cm from radio breakout) S224 S254 (diesel) S318 S330 S400 Trans fuse 20 10a Under- hood lamp Underhood fuse block
POWER DISTRIBUTION Power Distribution Wiring Diagram (2 of 5) for Chevrolet Chevy Express G2002 3500 List of elements for Power Distribution Wiring Diagram (2 of 5) for Chevrolet Chevy Express G2002 3500: 98 (4.3l, 5.0l, 5.7l) (6.5l, 8.1l: approx 4 cm from a/c comp clutch breakout, other: approx 14 cm from bulkhaed connector) s120 (crossbody harn, 10 cm from keyless entry module breakout) (crossbody harn, approx 20 cm from power door lock relay breakout) s232 (diesel: engine harn, approx 25 cm from bulkhead connector, gas: engine harn, approx 10 cm from underhood fuse block) (i/p harn, 7 cm from instrument cluster breakout) s218 (i/p harn, 8 cm from hvac sw breakout) s219 (i/p harn, approx 30 cm from bulkhead connector) s212 (i/p harn, approx 8 cm into i/p relay center breakout) s222 (i/p harness, approx 4 cm into power seat breakout) (i/p harness, approx 9 cm from hvac sw breakout) s227 (in bose amplifiers breakout) s338 (left body harn, 37 cm from from dome lamp breakout) s406 (sun shade illum mirror harness, approx 7 cm from right sun shade lamp breakout) s308 A.i.r. fuse 30a A/c compressor clutch relay A/c compressor fuse 10a Accessory power outlet B11 Batt fuse 50a C13 C202 C210 Center dome lamp Cig ltr fuse 13 20a Cigar lighter Convenience center Ctsy fuse 3 20a D13 Data link connector (dlc) Daytime running lamps (drl) control module Dome lamp Door lock control module Door lock rear cargo switch Door lock relay Driver door lock switch Driver seat adjuster switch Drl fuse 15 15a Ecm-b fuse 20a From underhood b fuse block (diagram 1 of 5) From underhood fuse-relay center (diagram 1 of 5) Front dome lamp Front passenger door lock switch Front passenger seat adjuster switch Front reading lamps Fuel pump relay G201 (behind left kick panel) Garage door opener Hazard fuse 5 20a Hazard switch Headlamp switch Horn fuse 20a Horn relay Htd mir fuse 2 20a Hvac control assembly I/p compartment lamp I/p fuse block Illuminated entry module Instrument panel cluster (ipc) Left front stepwell lamp Left vanity mirror lamp Lighting fuse 40a Luxury Multi- function alarm module Nca Outside rearview mirror switch Park lps fuse 9 20a Passlock module Powertrain control module (pcm) (diesel) Powertrain control module (pcm) (gasoline) Pwr accy fuse a 25a Pwr aux fuse 7 25a Radio Radio-b fuse 19 10a Rear dome lamp Rear window defogger relay Red Remote control door lock receiver or vehicle immobilizer module (vim) Right front stepwell lamp Right side stepwell lamp Right vanity mirror lamp Rr defog fuse 22 25a S127 S205 S211 (i/p harness, approx 4 cm from park brake warning switch breakout) S221 S228 Secondary air injection (air) pump relay Security fuse 21 10a Side door lock control Stop fuse 1 20a Tcc/ brake switch Underhood fuse box Underhood fuse center Underhood lamp W/ electric a W/ upfitter W/o upfitter Power Distribution Wiring Diagram (3 of 5) for Chevrolet Chevy Express G2002 3500 List of elements for Power Distribution Wiring Diagram (3 of 5) for Chevrolet Chevy Express G2002 3500: 44 (8.1l) (engine harn, approx 14 cm from a/c compressor high pressure cutoff switch breakout) s132 (engine harn, approx 15 cm into fuel injector harness breakout) s133 (engine harn, approx 4 cm from fuel injector harness breakout) s132 (engine harn, approx 4 cm from fuel injector harness breakout) s133 (engine harn, approx 7 cm from injector harn breakout) (engine harness, approx 10 cm from a/c compressor clutch breakout) s117 (engine jumper harn, approx 2 cm from the optical fuel temperature sensor breakout) s108 (fed) (cal) 4.3l 4.3l, 5.0l, 5.7l 5.0l, 5.7l 6.5l 6.5l & 8.1l 8.1l A/c compressor clutch relay C11 C12 Ecm-1 fuse 20a Etc fuse 15a Exhaust pressure regulator (epr) solenoid From ignition switch (diagram 1 of 5) Fuel injectors Glow plug relay Ign-e fuse 10a Ignition coil Ignition coils Ignition control module (icm) Nca Pnk Power- train control module (pcm) Powertrain control module (pcm) S132 S185 S186 S187 S188 S214 (i/p harn, approx 17 cm from bulkhead connector) Throttle actuator control (tac) module To eng-1 fuse (diagram 5 of 5) To i/p fuse block (diagram 4 of 5) Turbocharger wastegate solenoid Underhood fuse block Underhood fuse block center Power Distribution Wiring Diagram (4 of 5) for Chevrolet Chevy Express G2002 3500 List of elements for Power Distribution Wiring Diagram (4 of 5) for Chevrolet Chevy Express G2002 3500: 60 (eng harn, approx 75 cm from underhood fuse block) s139 (entertainment harn, approx 11 cm from second bose amplifier breakout) (entertainment harn, red (i/p harness, approx 37 cm from bulkhead connector) s217 (i/p harness, approx 4 cm from bulkhead connector breakout at base of steering column) s216 A12 Air bags fuse 10 10a Approx 16 cm from rear fuse block) s333 Automatic transmission Auxiliary fuse block Auxiliary power fuse 15a B10 B17 Base Bose amp 1 Bose amp 2 Bose amp fuse 20a C103 C210 Convenience center Coolant level module (diesel) Daytime running lamp (drl) control module Except base Fog lamp fuse 10a Fog lamp relay Foglamp enable relay (luxury) From aux-b fuse (diagram 1 of 5) From ignition switch (diagram 1 of 5) From s214 (diagram 3 of 5) From upfitter provision relay (diagram 1 of 5) Fuel sender buffer module (diesel) G403 (right rear wheel well) Gauges fuse 4 10a Hazard switch Headlamp switch I/p fuse block Illum fuse 14 10a Inflatable restraint sensing & diagnositc module (sdm) Inside rearview mirror (luxury) Instrument panel cluster (ipc) Interior lamp control module Interior lights system Interior lights system (headlamp switch) Multi- function alarm module Park/neutral position switch Passlock module Pnk Power amplifier fuse 20a Power amplifier relay Powertrain control module (pcm) (4.3l, 5.0l, 5.7l) Rear accessory power outlet Rear fuse block Red Remote control door lock receiver or vehicle immobilizer module Rsa-t fuse 10a Rsa-t module S336 Trans fuse 20 10a Turn b/u fuse 16 20a Vehicle speed sensor buffer (diesel) Power Distribution Wiring Diagram (5 of 5) for Chevrolet Chevy Express G2002 3500 List of elements for Power Distribution Wiring Diagram (5 of 5) for Chevrolet Chevy Express G2002 3500: 27 (4.3l: engine harn, approx 4 cm from icm breakout, 5.0l & 5.7l: engine harn, approx 12 cm from the heated right oxygen sensor breakout) s130 (engine harn jumper, approx 4 cm into the engine shutoff solenoid breakout) s107 (engine harn, approx 28 cm from generator breakout) s130 6.5l 8.1l Camshaft position (cmp) sensor Eng-1 fuse 20a Evaporative emission (evap) canister purge solenoid Evaporative emission (evap) canister purge valve Evaporative emission (evap) canister vent solenoid Evaporative emission (evap) canister vent valve From ecm-1 fuse (diagram 3 of 5) Fuel heater Fuel shutoff solenoid Fuel solenoid driver Heated oxygen sensor (ho2s) bank 1 sensor 1 Heated oxygen sensor (ho2s) bank 1 sensor 2 (4.3l) Heated oxygen sensor (ho2s) bank 1 sensor 2 (calif) Heated oxygen sensor (ho2s) bank 1 sensor 3 (5.0l & 5.7l) Heated oxygen sensor (ho2s) bank 2 sensor 1 Heated oxygen sensor (ho2s) bank 2 sensor 2 Mass airflow (maf) sensor Pnk S130 (engine harn, left top of engine) Secondary air injection (air) pump relay Underhood fuse block Water- in-fuel sensor
POWER DOOR LOCKS Power Door Lock Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for Power Door Lock Wiring Diagram for Chevrolet Chevy Express G2002 3500: 50 (crossbody harn, near power lock relay breakout) s243 Batt (b+) Battery (b+) C210 Convenience center (under left side of dash) Data link connector (under left side of dash) Dome lamps Dome lmp off Door lock control module (on left kick panel) Driver door lock actuator Driver dr unlk Driver power door lock switch Front passenger door lock actuator Front passenger power door lock switch G200 (left kick panel) Gauges fuse 4 10a Ground Hot at all times Hot in run, bulb test or start I/p fuse block (on left lower kick panel) Ignition Int lts in Interior lights system Lock Lock out Lock sig Pass drs unlk Pnk Power door lock relay (behind center of dash) Program sig Pwr accy fuse a 25a Rear cargo door lock switch Rear door lock actuator Remote control door lock receiver (behind center of dash) Rr door unlk S206 S216 S221 S228 S241 (crossbody harness, near power lock relay breakout) S242 (crossbody harn, near power lock relay breakout) S244 (crossbody harness, near power lock relay breakout) Side door contactor (right "b" pillar) Side door jamb switch Side door lock actuator Side door sw Tan Unlock Unlock in Unlock sig
POWER MIRRORS Power Mirror Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for Power Mirror Wiring Diagram for Chevrolet Chevy Express G2002 3500: 17 (behind left kick panel) g201 (left front door harness, approx 7 cm from power mirror motor connector) (right front door harness, approx 7 cm from power mirror switch connector) Ctsy fuse 3 20a Driver outside rearview mirror Hot at all times I/p fuse block Left mirror Outside rearview mirror switch Passenger outside rearview mirror Right mirror Right/ left motor S232 S500 S502 S604 Up/ down motor
POWER SEATS Power Seat Wiring Diagrams for Chevrolet Chevy Express G2002 3500 List of elements for Power Seat Wiring Diagrams for Chevrolet Chevy Express G2002 3500: 31 All- down All-up Back C306 C307 Down Driver seat adjuster switch Driver seat forward/ rearward, front vertical, rear vertical motor Entire seat For- ward Front down Front passenger seat adjuster switch Front passenger seat forward/ rearward, front vertical, rear vertical motor Front up G201 (behind left kick panel) Hot at all times I/p fuse block Left power seat forward/ rearward motor Left power seat front tilt motor Left power seat rear tilt motor Nca Pwr accy fuse a 25a Rear down Rear up Red Right power seat forward/ rearward motor Right power seat front tilt motor Right power seat rear tilt motor S256 S257 Tan
POWER WINDOWS Power Window Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for Power Window Wiring Diagram for Chevrolet Chevy Express G2002 3500: 17 (left kick panel) g200 (left kick panel) g201 C210 Convenience center (left side of dash) Driver window motor Driver window switch Front passenger window motor Front passenger window switch Hot in accy & run I/p fuse block (on lower left kick panel) Interior lights system Left Power wdo fuse b 25a Right S229 S500 Tan
RADIO Radio Wiring Diagrams, Except LT for Chevrolet Chevy Express G2002 3500 List of elements for Radio Wiring Diagrams, Except LT for Chevrolet Chevy Express G2002 3500: 61 (left body harn, near center high mounted stoplamp breakout) s424 (left front door harn, approx 4cm from the power winow breakout towards the radio speaker breakout) s504 (left front door harn, approx 7cm from the power window break- out towards p500) s503 (right body harn, near center high mounted stoplamp breakout) s423 A10 A11 A12 Acc voltage Antenna B10 B11 B12 Base Battery Class 2 data Computer data lines system Convenience center (left side of dash) Dimming sig G201 (behind left kick panel) Ground Hot at all times Hot in acc or run I/p fuse block I/p lamp Interior lights system Left front door speaker Left front door tweeter speaker Left rear door speaker Left rear speaker Lf speaker (+) Lf speaker (-) Lr speaker (+) Lr speaker (-) Nca Orn Pnk Power antenna system Premium Radio Radio i fuse 17 10a Radio on sig Radio-b fuse 19 10a Red Rf speaker (+) Rf speaker (-) Right front door speaker Right front door tweeter speaker Right rear door speaker Right rear speaker Rr speaker (+) Rr speaker (-) S202 S219 S220 S407 (left body harn, near rear tail lamp breakout, toward rear dome lamp breakout) S419 (left body harn, near rear tail lamp breakout, toward rear dome lamp breakout) S605 (right front door harn, approx 7cm from power window motor breakout towards p600) S606 (right front door harn, approx 7cm from power window switch breakout, toward c212 breakout) Tan W/ upfitter W/o upfitter Radio Wiring Diagrams, LT (1 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for Radio Wiring Diagrams, LT (1 of 4) for Chevrolet Chevy Express G2002 3500: 89 (behind left kick panel) g201 (in left front door harn, approx 7 cm from the power window motor breakout) A10 A11 A12 Acc voltage Amp voltage Antenna B10 B11 B12 Bare Battery Bose 200amp amplifier 1 (above right interior panel above rear wheelhouse) Class 2 data Computer data lines system Dimming sig Drain Front 100-watt audio amplifier (under front passenger seat) Front bass speaker Front speaker (+) Front speaker (-) Front subwfr (+) Front subwfr (-) G106 (left side of safety wall) G203 (behind left kick panel) G302 (right "b" pillar) G303 (left "b" pillar) G304 G304 (right rear wheel well) Ground Hot at all times Hot in acc or run I/p fuse block (left lower kick panel) I/p lamp Information not available Interior lights system L b pillar sp (+) L b pillar sp (-) Left b-pillar speaker Left front door speaker Lf lo aud sig (+) Lf lo aud sig (-) Lf speaker (+) Lf speaker (-) Lo spker sig (-) front aud sig (-) Lo spker sig (-) rear aud sig (-) Lr lo aud sig (+) Lr lo aud sig (-) Nca Pnk Power amplifier fuse 20a R b pillar sp (+) R b pillar sp (-) Radio Radio i fuse 17 10a Radio on sig Radio-b fuse 19 10a Rear 100-watt audio amplifier (behind right interior panel, rear of rear (wheelhouse) Rear fuse block Rear fuse block (rear of driver door, behind left interior panel) Rear speaker (+) Rear speaker (-) Rear woofer Remote radio sig Remote radio volt Rf lo aud sig (+) Rf lo aud sig (-) Rf speaker (+) Rf speaker (-) Right b-pillar speaker Rr lo aud sid (-) Rr lo aud sig (+) Rr lo aud sig (-) Rsa enable sig Rsa-t fuse 10a Rsa-t module (behind left interior panel rear of driver door) S202 S219 S220 S330 S331 S332 S334 S335 S503 Switch amplifier power relay Tan Vcp/dvd power sig Radio Wiring Diagrams, LT (2 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for Radio Wiring Diagrams, LT (2 of 4) for Chevrolet Chevy Express G2002 3500: 66 "b" pillar) (in enter- tainment harn, approx 7 cm from breakout to g304) (in entertainment harn, approx 15 cm from breakout to g304) (in entertainment harn, approx 19 cm from breakout to g304) (in right front door harn, approx 7cm from the power window motor breakout) s605 A nca A10 A11 A12 Amp voltage B nca B10 B11 B12 Bare Battery Bose 200amp amplifier 2 (above right interior panel above rear wheelhouse) Bose amplifier fuse 20a Drain G303 (left G304 (right rear wheel well) Ground Hot at all times L mid hl spkr (-) Left mid headliner speaker Left rear headliner speaker Lf speaker (-) Lr hl speaker (+) Lr hl speaker (-) Lr lo aud sig (+) Lr lo aud sig (-) Nca R mid hl spkr (+) R mid hl spkr (-) Rear fuse block (rear of driver door, behind left interior panel) Rear subwfr (-) Rear suwfr (+) Red Right front door speaker Right mid headliner speaker Right rear headliner speaker Rr hl spkr (+) Rr hl spkr (-) Rr lo aud sid (-) Rr lo aud sig (+) Rr lo aud sig (-) Rsa-t module (behind left interior panel rear of driver door) S331 S332 S336 S340 S341 (in enter- tainment harn, approx 11 cm from breakout to g304) S342 S343 S606 (in right front door harn, approx 7cm from the power window switch breakout) Serial data Tan Vcp aud left (+) Vcp aud right (+) Vcp sig (+) Vcp sig (-) Vcp/dvd power Vcp/dvd pwr Video cassette player (vcp) Video sig (+) Video sig (-) Radio Wiring Diagrams, LT (3 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for Radio Wiring Diagrams, LT (3 of 4) for Chevrolet Chevy Express G2002 3500: 37 Aux aud left (+) Aux aud right (+) Aux audio left sig (+) Aux audio right sig (+) Aux audio sig (-) Aux video hi sig Aux video high sig Aux video low sig Bare Battery Drain Front video display G303 (left "b" pillar) Game box (forward of right rear wheelhouse) Ground I/p lamp voltage Pnk Radio on sig Red Rsa-t module (behind left interior panel rear of driver door) S332 S394 Tan Vcp aud left (+) Vcp aud right (+) Vcp audio left sig (+) Vcp audio sig (-) Vcp audio sig right (+) Vcp ir serial data Vcp r pwr sense Vcp rear serial data Vcp select sig Vcp serial data Vcp standby sig Vcp video sig (+) Vcp video sig (-) Vcp/dvd pwr enable Radio Wiring Diagrams, LT (4 of 4) for Chevrolet Chevy Express G2002 3500 List of elements for Radio Wiring Diagrams, LT (4 of 4) for Chevrolet Chevy Express G2002 3500: 57 Amp relay cntrl Aux audio left sig (+) Aux audio right sig (+) Aux audio sig (-) Aux audleft sig (+) Aux audright sig (+) Aux video high sig Aux video low sig Bare Battery C310 C311 Drain Front video display G106 (left side of safety wall) G303 (left "b" pillar) Ground I/p lamp voltage Information not available Interior lights system Left (+) Left (-) Lr lo (+) Lr lo (-) Lr lo aud sig (+) Lr lo aud sig (-) Nca Pnk Rear seat audio (rsa) control (in rear overhead console) Rear video display Red Remote radio sig Remote radio volt Right (+) Right (-) Rr lo (+) Rr lo (-) Rr lo aud sig (+) Rr lo aud sig (-) Rsa enable cntrl Rsa-t module (behind left interior panel rear of driver door) S332 Tan Vcp aud left sig (+) Vcp aud sig right (+) Vcp audio left sig (+) Vcp audio sig (-) Vcp audio sig right (+) Vcp ir serial data Vcp pwr standby sig Vcp pwr stndby Vcp rear pwr sig Vcp rear serial data Vcp serial data Vcp video sel sig Vcp video sig (+) Vcp video sig (-)
SHIFT INTERLOCKS Shift Interlock Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for Shift Interlock Wiring Diagram for Chevrolet Chevy Express G2002 3500: 10 A/t shift lock solenoid (right side of steering column) G201 (behind left kick panel) Hot in run or start I/p fuse block Park/ neutral position switch (left side of transmission) c1 Pnk S201 S217 pnk Turn/ hazard switch Turn/bu fuse 16 20a
STARTING/CHARGING Charging Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for Charging Wiring Diagram for Chevrolet Chevy Express G2002 3500: 18 (not used) (right side of engine compartment, near fender well) g100 B16 B17 Battery Charge indicator Fusible link (10 ga- rust) Gauges fuse 4 10a Generator l Hot in run & start I/p fuse block (on left lower kick panel) Instrument cluster Pnk Power distribution system Powertrain control module (pcm) Red S216 Starting/charging system (starting circuit) Starting Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for Starting Wiring Diagram for Chevrolet Chevy Express G2002 3500: 31 (right side of engine compartment, near fender well) g100 Accy Auxiliary battery Batt Battery Battery junction block Crank fuse 8 10a Diesel Fusible link (10 ga- rust) G103 (6.5l, 4.3l: near generator bracket) (5.0l, 5.7l: rear of right cylinder head) (8.1l: rear of left cylinder head) G300 (left frame rail, near auxiliary battery) Gas Generator Hold- in winding I/p fuse block (on left lower kick panel) Ign-a fuse 40a Ignition switch Label stud Lock Off Orange Park/neutral position switch (on left side of transmission) Power distribution system Pull- in winding Red Run Start Starter motor Starter relay (in underhood fuse/relay center) Underhood fuse/relay center (on left side of engine compartment) White
SUPPLEMENTAL RESTRAINTS Supplemental Restraint Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for Supplemental Restraint Wiring Diagram for Chevrolet Chevy Express G2002 3500: 47 (behind left kick panel, near i/p fuse block) g202 (behind left kick panel, near power door lock control module) g201 (in i/p harness, approximately 4 cm (2 in) from 48 cavity connector at base of steering column, pnk 2 ohms 4 cm (2 in) from park brake warning switch breakout) s201 A10 A11 A12 A13 A14 A15 A16 A17 A18 Air bag indicator Air bags fuse 10 10a B17 Base Class 2 serial data Data link connector (dlc) (partial) (under left side of dash) Gauges fuse 4 10a Ground High control Hot in run & start I/p fuse block (on left lower kick panel) Ignition Indicator control Inflatable restraint diagnostic resistor Inflatable restraint front end discriminating sensor (on lower center of radiator support) Inflatable restraint ip module Inflatable restraint sensing & diagnostic module (under left front seat) Inflatable restraint steering wheel module Inflatable restraint steering wheel module coil Instrument panel cluster (ipc) Low control Multi-function alarm module (under left side of dash) Nca Ohms Over gvw Pnk S207 (in i/p harness, approximately 6 cm (2 in) from park brake warning switch breakout, toward data link connector (dlc)) S209 (in i/p harness, approximately 39 cm (16 in) from 36-way in-line connector, left rear of engine compartment at firewall, toward inflatable restraint sensing & diagnostic module) Seat belt switch Seat belt switch (open when buckled) (at driver's stationary belt connector) Sensor signal Shorting bar Toward instrument cluster breakout) s216
TRANSMISSION
4.3L 4.3L VIN W, A/T Wiring Diagram, 4L60-E for Chevrolet Chevy Express G2002 3500 List of elements for 4.3L VIN W, A/T Wiring Diagram, 4L60-E for Chevrolet Chevy Express G2002 3500: 102 (4.3l: left side of engine compt, near fenderwell) (5.0l & 5.7l) (5.0l & 5.7l: near thermostat housing) g101 (dash harn, in breakout to power seat harn) (engine harn, at breakout to a/c comp clutch) (near breakout to dlc) s207 (near breakout to pcm) (under left side of dash) data link connector +5v 1-2 shift solenoid 1-2 ss 2-3 shift solenoid 2-3 ss 3-2 shift solenoid 3-2 ss 4.3l 5.0l & 5.7l 5.0l, 5.7l A/t fluid pressure manual valve position switch Abs relay, electronic pwr brake booster, brake ctrl module Anti-lock brakes system Automatic transmission (4l60-e) B10 B17 Brake fuse 18 10a Brk sw C350 Cls 2 data Computer data lines system Cruise control system D3, d2 D4, d2 Ecm1 fuse 20a Ecmb fuse 20a Ect sig Electronic brake control module Engine coolant temperature sensor (top front of engine) Fluid temp sensor Fuel injectors, ignition coil G103 (4.3l: at the Gauges fuse 4 10a Generator bracket) (5.0l & 5.7l: rear of right cylinder head) Gnd Hot at all times Hot in off, run & start Hot in run Hot in run & start I/p fuse block (lower left kick panel) Ign Ignition control module, fuel injectors, ignition coil (4.3l) Instrument panel cluster (ipc) Lo ref Malfunction indicator lamp Mil ctrl Park/neutral position switch (left side of transmission) Passlock module, multi- function alarm module, interior lamp control module, drl module, headlamp module, inside rearview mirror, foglamp enable relay, drl rear park lamp relay Pc sol hi Pc sol lo Pnk Powertrain control module (on left inner fender panel) Press ctrl solenoid Prnd a Prnd b Prnd c Prnd p Prnd321 Range b Range c Red Red a Rev, lo S101 S102 S120 S132 S133 S139 S153 S154 S161 S162 S163 S164 S210 S216 S231 Sens gnd Tan Tcc pwm Tcc pwm solenoid Tcc sol Tcc solenoid Tcc/brake switch (on brake pedal support) Tft sens sig Throttle position sensor (left side of throttle body) Tp sig Trans fuse 20 10a Trans rng a Underhood fuse block (left side of engine compt) Vehicle speed sensor (right side of transmission) Vss hi Vss lo
5.0L 5.0L VIN M, A/T Wiring Diagram, 4L60-E for Chevrolet Chevy Express G2002 3500 List of elements for 5.0L VIN M, A/T Wiring Diagram, 4L60-E for Chevrolet Chevy Express G2002 3500: 102 (4.3l: left side of engine compt, near fenderwell) (5.0l & 5.7l) (5.0l & 5.7l: near thermostat housing) g101 (dash harn, in breakout to power seat harn) (engine harn, at breakout to a/c comp clutch) (near breakout to dlc) s207 (near breakout to pcm) (under left side of dash) data link connector +5v 1-2 shift solenoid 1-2 ss 2-3 shift solenoid 2-3 ss 3-2 shift solenoid 3-2 ss 4.3l 5.0l & 5.7l 5.0l, 5.7l A/t fluid pressure manual valve position switch Abs relay, electronic pwr brake booster, brake ctrl module Anti-lock brakes system Automatic transmission (4l60-e) B10 B17 Brake fuse 18 10a Brk sw C350 Cls 2 data Computer data lines system Cruise control system D3, d2 D4, d2 Ecm1 fuse 20a Ecmb fuse 20a Ect sig Electronic brake control module Engine coolant temperature sensor (top front of engine) Fluid temp sensor Fuel injectors, ignition coil G103 (4.3l: at the Gauges fuse 4 10a Generator bracket) (5.0l & 5.7l: rear of right cylinder head) Gnd Hot at all times Hot in off, run & start Hot in run Hot in run & start I/p fuse block (lower left kick panel) Ign Ignition control module, fuel injectors, ignition coil (4.3l) Instrument panel cluster (ipc) Lo ref Malfunction indicator lamp Mil ctrl Park/neutral position switch (left side of transmission) Passlock module, multi- function alarm module, interior lamp control module, drl module, headlamp module, inside rearview mirror, foglamp enable relay, drl rear park lamp relay Pc sol hi Pc sol lo Pnk Powertrain control module (on left inner fender panel) Press ctrl solenoid Prnd a Prnd b Prnd c Prnd p Prnd321 Range b Range c Red Red a Rev, lo S101 S102 S120 S132 S133 S139 S153 S154 S161 S162 S163 S164 S210 S216 S231 Sens gnd Tan Tcc pwm Tcc pwm solenoid Tcc sol Tcc solenoid Tcc/brake switch (on brake pedal support) Tft sens sig Throttle position sensor (left side of throttle body) Tp sig Trans fuse 20 10a Trans rng a Underhood fuse block (left side of engine compt) Vehicle speed sensor (right side of transmission) Vss hi Vss lo
5.7L 5.7L VIN R, A/T Wiring Diagram, 4L60-E for Chevrolet Chevy Express G2002 3500 List of elements for 5.7L VIN R, A/T Wiring Diagram, 4L60-E for Chevrolet Chevy Express G2002 3500: 102 (4.3l: left side of engine compt, near fenderwell) (5.0l & 5.7l) (5.0l & 5.7l: near thermostat housing) g101 (dash harn, in breakout to power seat harn) (engine harn, at breakout to a/c comp clutch) (near breakout to dlc) s207 (near breakout to pcm) (under left side of dash) data link connector +5v 1-2 shift solenoid 1-2 ss 2-3 shift solenoid 2-3 ss 3-2 shift solenoid 3-2 ss 4.3l 5.0l & 5.7l 5.0l, 5.7l A/t fluid pressure manual valve position switch Abs relay, electronic pwr brake booster, brake ctrl module Anti-lock brakes system Automatic transmission (4l60-e) B10 B17 Brake fuse 18 10a Brk sw C350 Cls 2 data Computer data lines system Cruise control system D3, d2 D4, d2 Ecm1 fuse 20a Ecmb fuse 20a Ect sig Electronic brake control module Engine coolant temperature sensor (top front of engine) Fluid temp sensor Fuel injectors, ignition coil G103 (4.3l: at the Gauges fuse 4 10a Generator bracket) (5.0l & 5.7l: rear of right cylinder head) Gnd Hot at all times Hot in off, run & start Hot in run Hot in run & start I/p fuse block (lower left kick panel) Ign Ignition control module, fuel injectors, ignition coil (4.3l) Instrument panel cluster (ipc) Lo ref Malfunction indicator lamp Mil ctrl Park/neutral position switch (left side of transmission) Passlock module, multi- function alarm module, interior lamp control module, drl module, headlamp module, inside rearview mirror, foglamp enable relay, drl rear park lamp relay Pc sol hi Pc sol lo Pnk Powertrain control module (on left inner fender panel) Press ctrl solenoid Prnd a Prnd b Prnd c Prnd p Prnd321 Range b Range c Red Red a Rev, lo S101 S102 S120 S132 S133 S139 S153 S154 S161 S162 S163 S164 S210 S216 S231 Sens gnd Tan Tcc pwm Tcc pwm solenoid Tcc sol Tcc solenoid Tcc/brake switch (on brake pedal support) Tft sens sig Throttle position sensor (left side of throttle body) Tp sig Trans fuse 20 10a Trans rng a Underhood fuse block (left side of engine compt) Vehicle speed sensor (right side of transmission) Vss hi Vss lo
WARNING SYSTEMS Warning System Wiring Diagrams for Chevrolet Chevy Express G2002 3500 List of elements for Warning System Wiring Diagrams for Chevrolet Chevy Express G2002 3500: 45 (under left front seat) A12 A15 A16 B14 Base Battery input C200 C210 Convenience center (under left side of dash) Driver door jamb switch Except base Fasten belts out G201 (left kick panel) Gauges fuse 4 10a Ground Hazard fuse 5 20a Hot at all times Hot in park or head Hot in run or start I/p fuse block (on lower left kick panel) Ignition key alarm switch Ignition on input Illum mir fuse 14 10a Inflatable restraint sensing & diagnostic module (sdm) Instrument cluster system Instrument panel cluster (ipc) Key-in sw input Left front seat belt switch (opens with belt buckled) (in driver's stationary belt connector) Lights on input Multi-function alarm module (under left side of dash) Nca Pnk S201 S202 S206 S209 (i/p harn, near sdm breakout) S216 S222 S223 S500 Safety belt input Safety belt lamp Speed input Tan
WIPER/WASHER Wiper/Washer Wiring Diagram for Chevrolet Chevy Express G2002 3500 List of elements for Wiper/Washer Wiring Diagram for Chevrolet Chevy Express G2002 3500: 21 Delay G201 (behind left kick panel) Hot in accy & run I/p fuse block (on lower left kick panel) Inst wipe Inst wipe k Low Mist Mist off Off Red S201 S252 Solid state Wash Washer switch Windshield washer fluid pump (on left front of engine compartment, at washer reservoir) Windshield washer/ wiper switch Windshield wiper motor (on left side of firewall) Wiper fuse 11 25a Wiper switch
