Разделы схем — 28 (всего 71)
AIR CONDITIONING ANTI-LOCK BRAKES ANTI-THEFT BODY COMPUTER COMPUTER DATA LINES CRUISE CONTROL DEFOGGERS ELECTRONIC SUSPENSION ENGINE PERFORMANCE EXTERIOR LIGHTS GROUND DISTRIBUTION HEADLIGHTS HORN INSTRUMENT CLUSTER INTERIOR LIGHTS MEMORY SYSTEMS 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 Silverado 1999 2500 List of elements for 4.3L VIN W, Compressor Wiring Diagram for Chevrolet Silverado 1999 2500: 22 4.3l A/c automatic recirculating switch (in a/c muffler hose) A/c comp fuse 10a A/c compressor clutch A/c compressor clutch relay A/c high pressure cutout switch (on a/c compressor) A/c low pressure cutout switch (right side of accumulator) A/c request All other gas Diesel G100 (on left radiator support bracket) G102 (front of engine block) Hot at all times Hot in run or start Hvac control module Ign e fuse 10a Relay cont S101 (engine harn) S102 (engine harn) Switch input Underhood bussed electrical center Vehicle control module (left side of engine compt) 4.3L VIN W, Heater Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for 4.3L VIN W, Heater Wiring Diagram for Chevrolet Silverado 1999 2500: 15 Blower motor Blower motor relay Blower motor resistor/ relay assembly (on hvac module, near blower motor) Blower motor switch D12 Frt hvac fuse 30a G200 (right side of dash, at "a" pillar) Hot at all times Hot in run Htr-a/c fuse 25a Interior lights system Left bussed electrical center Off Tan Underhood bussed electrical center 4.3L VIN W, Manual A/C Wiring Diagram, Base for Chevrolet Silverado 1999 2500 List of elements for 4.3L VIN W, Manual A/C Wiring Diagram, Base for Chevrolet Silverado 1999 2500: 59 4.3l 4.3l A a/c disable A/c automatic recirculating switch (in a/c muffler hose) A/c comp fuse 10a A/c compressor clutch A/c compressor clutch relay A/c high pressure cutout switch (on a/c compressor) A/c low pressure cutout switch (on a/c compressor) A/c request All other gas all other gas B mode signal Blower motor (under right side of dash) Blower motor resistor/relay assembly (on hvac module, near blower motor) C 1995 vftc C ground C1 c1 C2 c2 C3 c3 D recirc signal D12 Diesel diesel E illumination F temp signal Frt hvac fuse 30a G feedback G100 (on left radiator support bracket) G102 (front of engine block) G200 (right side of dash, at "a" pillar) G203 (on upper left dash at "a" pillar) H 5v reference High Hot at all times Hot in run Hot in run and start Htr-a/c fuse 25a Hvac 1 fuse 10a Hvac control module (under radio) Ign e fuse 10a Interior lights system J rear defog K ign power L a/c request Left bussed electrical center Low M feedback Mid bussed electrical center Mode door motor (left side of hvac module) Off Rear defogger system Recirculation door motor (top of hvac module) Red Relay cont S101 (engine harn) S102 (engine harn) Switch sig Tan Temperature door motor (bottom center of hvac module) Underhood bussed electrical center Vehicle vehicle control control module module (left side (left side of engine of engine compt) compt) 4.3L VIN W, Manual A/C Wiring Diagram, Up Level for Chevrolet Silverado 1999 2500 List of elements for 4.3L VIN W, Manual A/C Wiring Diagram, Up Level for Chevrolet Silverado 1999 2500: 57 4.3l 4.3l A a/c disable A/c automatic recirculating switch (in a/c muffler hose) A/c comp fuse 10a A/c compressor clutch A/c compressor clutch relay A/c high pressure cutout switch (on a/c compressor) A/c low pressure cutout switch (on right side of accumulator) A/c request All other gas all other gas B mode signal Blower motor (under right side of dash) Blower motor resistor/relay assembly (on hvac module, near blower motor) C 1995 vftc C ground C1 c1 C2 c2 C3 c3 D recirc signal D12 Diesel diesel E illumination F temp signal Frt hvac fuse 30a G feedback G100 (on left radiator support bracket) G102 (front of engine block) G200 (on upper dash, near "a" pillar) H 5v reference Hot at all times Hot in run Hot in run and start Htr-a/c fuse 25a Hvac 1 fuse 10a Hvac control module (under radio) Ign e fuse 10a Interior lights system J rear defog K ign power L a/c request Left bussed electrical center M feedback Mode door motor (left side of hvac module) Module) Off Rear defogger system Recirculation door motor (top of hvac module) Red Relay cont Right bussed electrical center S101 (engine harn) S102 (engine harn) Switch sig Tan Temperature door motor (near bottom of hvac Underhood bussed electrical center Vehicle vehicle control control module module (left side (left side of engine of engine compt) compt)
4.8L 4.8L VIN V, Compressor Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for 4.8L VIN V, Compressor Wiring Diagram for Chevrolet Silverado 1999 2500: 22 4.3l A/c automatic recirculating switch (in a/c muffler hose) A/c comp fuse 10a A/c compressor clutch A/c compressor clutch relay A/c high pressure cutout switch (on a/c compressor) A/c low pressure cutout switch (right side of accumulator) A/c request All other gas Diesel G100 (on left radiator support bracket) G102 (front of engine block) Hot at all times Hot in run or start Hvac control module Ign e fuse 10a Relay cont S101 (engine harn) S102 (engine harn) Switch input Underhood bussed electrical center Vehicle control module (left side of engine compt) 4.8L VIN V, Heater Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for 4.8L VIN V, Heater Wiring Diagram for Chevrolet Silverado 1999 2500: 15 Blower motor Blower motor relay Blower motor resistor/ relay assembly (on hvac module, near blower motor) Blower motor switch D12 Frt hvac fuse 30a G200 (right side of dash, at "a" pillar) Hot at all times Hot in run Htr-a/c fuse 25a Interior lights system Left bussed electrical center Off Tan Underhood bussed electrical center 4.8L VIN V, Manual A/C Wiring Diagram, Base for Chevrolet Silverado 1999 2500 List of elements for 4.8L VIN V, Manual A/C Wiring Diagram, Base for Chevrolet Silverado 1999 2500: 59 4.3l 4.3l A a/c disable A/c automatic recirculating switch (in a/c muffler hose) A/c comp fuse 10a A/c compressor clutch A/c compressor clutch relay A/c high pressure cutout switch (on a/c compressor) A/c low pressure cutout switch (on a/c compressor) A/c request All other gas all other gas B mode signal Blower motor (under right side of dash) Blower motor resistor/relay assembly (on hvac module, near blower motor) C 1995 vftc C ground C1 c1 C2 c2 C3 c3 D recirc signal D12 Diesel diesel E illumination F temp signal Frt hvac fuse 30a G feedback G100 (on left radiator support bracket) G102 (front of engine block) G200 (right side of dash, at "a" pillar) G203 (on upper left dash at "a" pillar) H 5v reference High Hot at all times Hot in run Hot in run and start Htr-a/c fuse 25a Hvac 1 fuse 10a Hvac control module (under radio) Ign e fuse 10a Interior lights system J rear defog K ign power L a/c request Left bussed electrical center Low M feedback Mid bussed electrical center Mode door motor (left side of hvac module) Off Rear defogger system Recirculation door motor (top of hvac module) Red Relay cont S101 (engine harn) S102 (engine harn) Switch sig Tan Temperature door motor (bottom center of hvac module) Underhood bussed electrical center Vehicle vehicle control control module module (left side (left side of engine of engine compt) compt) 4.8L VIN V, Manual A/C Wiring Diagram, Up Level for Chevrolet Silverado 1999 2500 List of elements for 4.8L VIN V, Manual A/C Wiring Diagram, Up Level for Chevrolet Silverado 1999 2500: 57 4.3l 4.3l A a/c disable A/c automatic recirculating switch (in a/c muffler hose) A/c comp fuse 10a A/c compressor clutch A/c compressor clutch relay A/c high pressure cutout switch (on a/c compressor) A/c low pressure cutout switch (on right side of accumulator) A/c request All other gas all other gas B mode signal Blower motor (under right side of dash) Blower motor resistor/relay assembly (on hvac module, near blower motor) C 1995 vftc C ground C1 c1 C2 c2 C3 c3 D recirc signal D12 Diesel diesel E illumination F temp signal Frt hvac fuse 30a G feedback G100 (on left radiator support bracket) G102 (front of engine block) G200 (on upper dash, near "a" pillar) H 5v reference Hot at all times Hot in run Hot in run and start Htr-a/c fuse 25a Hvac 1 fuse 10a Hvac control module (under radio) Ign e fuse 10a Interior lights system J rear defog K ign power L a/c request Left bussed electrical center M feedback Mode door motor (left side of hvac module) Module) Off Rear defogger system Recirculation door motor (top of hvac module) Red Relay cont Right bussed electrical center S101 (engine harn) S102 (engine harn) Switch sig Tan Temperature door motor (near bottom of hvac Underhood bussed electrical center Vehicle vehicle control control module module (left side (left side of engine of engine compt) compt)
5.3L 5.3L VIN T, Compressor Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for 5.3L VIN T, Compressor Wiring Diagram for Chevrolet Silverado 1999 2500: 22 4.3l A/c automatic recirculating switch (in a/c muffler hose) A/c comp fuse 10a A/c compressor clutch A/c compressor clutch relay A/c high pressure cutout switch (on a/c compressor) A/c low pressure cutout switch (right side of accumulator) A/c request All other gas Diesel G100 (on left radiator support bracket) G102 (front of engine block) Hot at all times Hot in run or start Hvac control module Ign e fuse 10a Relay cont S101 (engine harn) S102 (engine harn) Switch input Underhood bussed electrical center Vehicle control module (left side of engine compt) 5.3L VIN T, Heater Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for 5.3L VIN T, Heater Wiring Diagram for Chevrolet Silverado 1999 2500: 15 Blower motor Blower motor relay Blower motor resistor/ relay assembly (on hvac module, near blower motor) Blower motor switch D12 Frt hvac fuse 30a G200 (right side of dash, at "a" pillar) Hot at all times Hot in run Htr-a/c fuse 25a Interior lights system Left bussed electrical center Off Tan Underhood bussed electrical center 5.3L VIN T, Manual A/C Wiring Diagram, Base for Chevrolet Silverado 1999 2500 List of elements for 5.3L VIN T, Manual A/C Wiring Diagram, Base for Chevrolet Silverado 1999 2500: 59 4.3l 4.3l A a/c disable A/c automatic recirculating switch (in a/c muffler hose) A/c comp fuse 10a A/c compressor clutch A/c compressor clutch relay A/c high pressure cutout switch (on a/c compressor) A/c low pressure cutout switch (on a/c compressor) A/c request All other gas all other gas B mode signal Blower motor (under right side of dash) Blower motor resistor/relay assembly (on hvac module, near blower motor) C 1995 vftc C ground C1 c1 C2 c2 C3 c3 D recirc signal D12 Diesel diesel E illumination F temp signal Frt hvac fuse 30a G feedback G100 (on left radiator support bracket) G102 (front of engine block) G200 (right side of dash, at "a" pillar) G203 (on upper left dash at "a" pillar) H 5v reference High Hot at all times Hot in run Hot in run and start Htr-a/c fuse 25a Hvac 1 fuse 10a Hvac control module (under radio) Ign e fuse 10a Interior lights system J rear defog K ign power L a/c request Left bussed electrical center Low M feedback Mid bussed electrical center Mode door motor (left side of hvac module) Off Rear defogger system Recirculation door motor (top of hvac module) Red Relay cont S101 (engine harn) S102 (engine harn) Switch sig Tan Temperature door motor (bottom center of hvac module) Underhood bussed electrical center Vehicle vehicle control control module module (left side (left side of engine of engine compt) compt) 5.3L VIN T, Manual A/C Wiring Diagram, Up Level for Chevrolet Silverado 1999 2500 List of elements for 5.3L VIN T, Manual A/C Wiring Diagram, Up Level for Chevrolet Silverado 1999 2500: 57 4.3l 4.3l A a/c disable A/c automatic recirculating switch (in a/c muffler hose) A/c comp fuse 10a A/c compressor clutch A/c compressor clutch relay A/c high pressure cutout switch (on a/c compressor) A/c low pressure cutout switch (on right side of accumulator) A/c request All other gas all other gas B mode signal Blower motor (under right side of dash) Blower motor resistor/relay assembly (on hvac module, near blower motor) C 1995 vftc C ground C1 c1 C2 c2 C3 c3 D recirc signal D12 Diesel diesel E illumination F temp signal Frt hvac fuse 30a G feedback G100 (on left radiator support bracket) G102 (front of engine block) G200 (on upper dash, near "a" pillar) H 5v reference Hot at all times Hot in run Hot in run and start Htr-a/c fuse 25a Hvac 1 fuse 10a Hvac control module (under radio) Ign e fuse 10a Interior lights system J rear defog K ign power L a/c request Left bussed electrical center M feedback Mode door motor (left side of hvac module) Module) Off Rear defogger system Recirculation door motor (top of hvac module) Red Relay cont Right bussed electrical center S101 (engine harn) S102 (engine harn) Switch sig Tan Temperature door motor (near bottom of hvac Underhood bussed electrical center Vehicle vehicle control control module module (left side (left side of engine of engine compt) compt)
ANTI-LOCK BRAKES Anti-lock Brake Wiring Diagrams for Chevrolet Silverado 1999 2500 List of elements for Anti-lock Brake Wiring Diagrams for Chevrolet Silverado 1999 2500: 57 4.3l A4 c1 Abs fuse 60a Automated transfer case control module (left side of dash, above headlight switch) Body wiring harness junction block (near left kick panel) Brake fluid level sw in Brake fluid level switch (left side of brake fluid reservoir) Brake fuse 10a Brake input Brake pressure modulator valve C11 C8 a Data link connector (below steering column) Electronic brake control module (left side of inner frame) Engine control system Engine wiring harness junction block (left side of engine compt) Except 4.3 l F6 c3 F7 c2 Front axle act/sw input Front axle actuator/ switch (on axle housing) Fuse block (lower left side of dash) G110 (4.8l, 5.3l, 6.0l) (left front of engine) G116 (left rear of engine compt, near bulkhead) G119 (4.3l) (rt frt of eng) Ground Hot at all times Hot in run Hot in run and start Ign 1 fuse 10a Ignition Instrument cluster Left front sensor (+) Left front sensor (-) Left front wheel speed sensor Logic Motor & solenoid pwr Nca Pnk Power distribution system Powertrain control module or vehicle control module (left front of engine compt) Pump motor Red Right front sensor (+) Right front sensor (-) Right front wheel speed sensor S102 Serial data Splice pack 205 center (near left kick panel) Stoplamp switch (top of brake pedal bracket) Tan Vehicle speed sensor (left rear of transmission) Vehicle speed sensor adapter (4wd only) (left side of transfer case) Vss high Vss input Vss low Vss output
ANTI-THEFT Anti-theft Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Anti-theft Wiring Diagram for Chevrolet Silverado 1999 2500: 28 4.3l c4 data A12 Battery Body control module (below steering column) Connector (below steering column) Cruise fuse 10a Data Data link Except 4.3l c1 F10 G200 (upper left kick panel) Grd Hot at all times Hot in run Ign 1 fuse 10a Ign pwr Left bussed electrical center (on lower left side of dash) Mid bussed electrical center (near left kick panel) Passlock sensor (part of the ignition cylinder) Pnk Sensor data Sensor pwr Sensor ret Sp203 Sp203 (upper left kick panel) Tbc fuse 10a Underhood bussed electrical center (on left side of engine compt) Vehicle control module (4.3l), powertrain control module (except 4.3l) (on left front of engine compt)
BODY COMPUTER Body Computer Wiring Diagrams for Chevrolet Silverado 1999 2500 List of elements for Body Computer Wiring Diagrams for Chevrolet Silverado 1999 2500: 80 (54 or 394) 12v ref 5v ref A10 A11 A12 Acc relay Ambient light sensor (top center of dash) Anti-theft system B10 B11 B12 Battery Body control module (below steering column) Cargo lp Class 2 data Computer data lines system Cruise fuse 10a Ctsy lp Ctsy lp rly Door latch Door locks system Door sw Dr unlk rly Drl rly coil Engine controls system Exterior lights system F10 Fog lp rly Fog lp sw Ftp sw G200 (upper left kick panel) Ground Headlamp rly Headlights system Headlp dim Horn rly out Horns system Hot at all times Hot in run Hot in run and start Ign 1 feed Ign 1 fuse 10a Ign 3 input Inadv pwr Inst panel lp Int lp sw Interior lights system Key cyl sw Key reminder Led dim Left bussed electrical center Lf dr sw Lock coil Lp rly coil Lt turn input Mid bussed electrical center Nca Park brake switch Passlock sig Photocell Pk lp rly Pk lps feed Pnk Power distribution system Prk bk sw Rfa link Rt turn input Seat belt sw Sensor rtn Serial data Sp203 Tan Tbc fuse 10a Tow/haul sw Tow/haul switch Underhood bussed electrical center Unlock coil Vss Warning system
COMPUTER DATA LINES Computer Data Lines for Chevrolet Silverado 1999 2500 List of elements for Computer Data Lines for Chevrolet Silverado 1999 2500: 19 (under driver's seat) inflatable restraint sensing & diagnostic module 4.3l A12 All other gas Automatic transfer case control module (left side of dash, above headlight switch) Body control module (on lower left side of dash, below steering column) Cigar fuse 15a Data link connector (dlc) (under left side of dash, below steering column) Diesel Electronic brake control module (ebcm) (on left side of the inner frame) G117 (right rear of of engine) G200 (upper left kick panel) Hot at all times Instrument cluster Mid bussed electrical center (under left side of dash) Splice pack sp205 (left side of dash) Tan Underhood bussed electrical center (on left side of engine compt) Vehicle control module (vcm)/ powertrain control module (pcm) (left front of engine compt)
CRUISE CONTROL Cruise Control Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Cruise Control Wiring Diagram for Chevrolet Silverado 1999 2500: 63 (4.3l vin w) (other) 4.3l 4.3l only A/t A12 A13 A14 A15 Bare Brake cutout Brake fuse 10a C1 a4 C1 a6 C2 f6 Clutch pedal position switch (on top of clutch pedal bracket) Cruise control module (left rear of engine compt, on firewall) Cruise control switch Cruise fuse 10a Cruise on ind cntrl Cruise on/off Cruise set/coast D11 Data link connector (below steering column) F11 F12 G115 (rear of engine) Ground Hot at all times Hot in run Hot in run and start Ign 1 fuse 10a Ignition Instrument cluster Instrument cluster system Left bussed electrical center (on lower left side of dash) Logic M/t Mid bussed electrical center (under left left of dash) Nca Off On ind control Orn Other Pnk R/a Resume/accel S103 Serial data Set sw Sound system Splice pack 205 (left side of dash, behind headlamp switch) Stop lps fuse 20a Stoplamp sw input Stoplamp switch (on top of brake pedal bracket) Underhood bussed electrical center (on left side of engine compartment) Veh stop fuse 10a Vehicle control module (pcm) powertrain control module (vcm) (left front of engine compt) Vehicle speed sensor (vss) (left rear side of transmission) Vehicle speed sensor adapter (4wd only, except 4.3l) Vss high Vss input Vss low
DEFOGGERS Defogger Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Defogger Wiring Diagram for Chevrolet Silverado 1999 2500: 27 (base) (right "b" pillar) g305 (uplevel) (upper right kick panel) g203 A c1 A c2 C c1 D9 c1 F3 c1 Fuse block (on lower left side of dash) G200 Ground Hot at all times Hot in run Hot in run & start Hvac 1 fuse 10a Hvac control module (in center of dash, under radio) Ign Ign fuse 10a Ind K c1 Rear window defogger grid Rear window defogger relay Relay ctrl Rr defog fuse 30a Splice pack sp203 (upper left kick panel) Underhood junction block (at left side of engine compartment, near battery) Heated Mirrors Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Heated Mirrors Wiring Diagram for Chevrolet Silverado 1999 2500: 38 Base Body junction block (under left side of dash, near kick panel) C c7 C1 c C1 f2 D2 c1 D9 c1 Defog request Defogger switch/ timer Driver outside rearview mirror Driver window/ door lock switch F c5 F3 c1 Fuse block (on lower left side of dash) G200 (upper left kick panel) G203 (upper right kick panel) Ground Ground distribution system Hot at all times Hot in run Hot in run & start Htd mir fuse 10a Hvac 1 fuse 10a Hvac control module (in center of dash, under radio) I/p junction block (on lower right side of dash) Ign 3 Ign e fuse 10a Ind K c1 M c1 Nca Passenger outside rearview mirror Passenger window/ door lock switch Rear window defogger relay Relay ctrl Splice pack 203 Underhood junction block (at left side of engine compartment, near battery) Uplevel
ELECTRONIC SUSPENSION Electronic Suspension Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Electronic Suspension Wiring Diagram for Chevrolet Silverado 1999 2500: 22 Dimming control E11 Firm G200 G308 (left side of "b" pillar) G415 (on spare tire hoist bracket) Hot in run or start Illum Indicator Interior lights system Left bussed electrical center (on lower left side of dash) Left front shock solenoid valve (part of left front shock absorber) Left rear shock solenoid valve (part of left rear shock absorber) Mid bussed electrical center (left side of dash, near kick panel) Off Pnk Right front shock solenoid valve (part of right front shock absorber) Right rear shock solenoid valve (part of right rear shock absorber) Selectable ride switch Seo ign fuse 10a Sp203 (upper left kick panel) Underhood bussed electrical center (left side of engine compt)
ENGINE PERFORMANCE
4.3L 4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Silverado 1999 2500 List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Silverado 1999 2500: 65 (attached to right rear of throttle body) (left rear of engine) (on bottom front of engine near crank pulley) crankshaft position sensor (on right front side of engine) evaporative emissions canister vent (evap) (top right rear of engine) evaporative emissions (evap) canister purge valve 1-2 shift sol ctrl 2-3 shift sol ctrl 3-2 ctrl sol ctrl B1 c2 Cam posit sens rtn Cam posit sens sig Camshaft position sensor (inside distributor) Crank posit sens rtn Crank posit sens sig Ect sens input Egr posit input Electronic brake control module (ebcm) (on left side of inner frame) Evap G114 G117 (right rear of engine) Heated oxygen sensor (ho2s) bank 1 sensor 1 (in exhaust pipe, before catalytic converter) Heated oxygen sensor (ho2s) bank 2 sensor 1 (in exhaust pipe, before catalytic converter) Heated oxygen sensor (ho2s) bank 2 sensor 2 (in exhaust pipe, after catalytic converter) Ho2s sens hi Ho2s sens lo Hot in run or start Iat sens sig Idle air control (iac) valve Idle air ctrl (iac) a hi Idle air ctrl (iac) b lo Ign feed Inj 1 ctrl Inj 2 ctrl Inj 3 ctrl Inj 4 ctrl Inj 5 ctrl Inj 6 ctrl Instrument cluster system (tachometer) Knock sens sig Knock sensor (on rear of engine block) Map sens input Mass air flow sens sig Nca O2a fuse 15a O2b fuse 15a Pnk Purge valve S104 Sair pump rly Sens rtn Sens sig Tach out Tan Tcc on/off sol ctrl Tcc pwm sol ctrl Throttle posit sens Trans temp sens sig Underhood bussed electrical center Vehicle control module (vcm) (on left front of engine compartment) Vehicle spd output sig Vehicle speed sensor (left rear side of transmission) Vehicle speed sensor shield Vss input Vss rtn Vss signal 4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Silverado 1999 2500 List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Silverado 1999 2500: 44 1-2 shift sol 2-3 shift sol 3-2 control sol Automatic transmission B6 c3 C ground C10 C12 D ign D10 E maf sig E12 E3 c2 Eng1 fuse 10a Exhaust gas recirculation valve (egr) (top front of engine, near thermostat housing) Fuel inj 1 Fuel inj 2 Fuel inj 3 Fuel inj 4 Fuel inj 5 Fuel inj 6 no.6 G117 (right rear of engine) Heated oxygen sensor (ho2s) bank 1 sensor 2 (in exhaust pipe, after catalytic converter) Hot in run or start Iat sensor Inja fuse 15a Injb fuse 15a Mass air flow sensor (in air intake duct) Nca Pnk Pnk b Pnk d Pnk e Pnk h Pnk j Pnk l Pressure control solenoid valve Red S103 Tan Tcc on/off sol Tcc pwm sol Transmission fluid temperature (tft) sensor (internal) Underhood bussed electrical center 4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Silverado 1999 2500 List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Silverado 1999 2500: 40 (in engine harn) (in fuel tank) fuel tank pressure sensor (left rear of engine) (right front of engine) 5v ref Air maxi fuse 30a Engine coolant level switch (in coolant reservoir) Engine coolant temperature sensor (left rear side of cylinder head) Engine oil level switch (right side of oil pan) Front axle actuator/ switch G114 G114 (left rear of engine) G119 Hot at all times Hot in run or start Ign0 fuse 10a Ign1 fuse 10a Igne fuse 10a Instrument cluster Left bussed electrical center Manifold absolute pressure (map) sensor (top right of engine, near fuel injectors) Map Mid bussed electrical center c1 Pnk Red Red a Ref lo S102 S104 S105 S106 (in engine harn) S107 S108 Secondary air injection pump relay (in underhood bussed electrical center) Secondary air injection reaction pump (right rear of engine compt) Secondary air injection reaction valve solenoid (right rear of engine compt) Service engine soon indicator Temp Throttle position (tp) sensor (on throttle body assembly) Underhood bussed electrical center 4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Silverado 1999 2500 List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Silverado 1999 2500: 85 (left frame rail near body mount) (right rear of engine) 12v battery fused 4wd fuse 15a 4wd low ind sig 5v ref voltage 5v return A/c comp rly ctrl A/c rec sw A/c request signal A/c system Automatic transfer case control module (above headlight switch) Body control module (below steering column) Brake fuse 10a Brake switch input C11 Check eng lp ind out Clutch pedal position switch (top of clutch pedal) Coil wire Comp cycling sw Coolant lev Cpp sw input Cruise control system Cruise control system, body computer system (vehicle speed signal) Cruise ctrl sig-eng Data link connector (below steering column) Distributor Ecm1 fuse 10a Ecmb fuse 20a Egr valve cntrl Est output sig Evap sol purge ctrl Four whl dr sig lo Fuel lev sensor Fuel pump relay Fuel pump rly ctrl Fuel pump/ level sensor Fused output G117 G119 (right front of engine) G402 Gen term l Ground Hot at all times Hot in run and start Ign Ign timing sig. Ignition coil (top right rear of engine) Ignition control module (right side, top of engine) Ignition feed Left bussed electrical center Manual 4wd Mid bussed electrical center c1 Oil level signal Park/neutral position switch (left side of transmission) Pnk Pnk a Power Press ctrl sol hi Press ctrl sol lo Prndl a Prndl b Prndl c Prndl p Recirc door sig Red S102 S103 S199 Sensor ground Serial data Serial data sig Sp205 (behind headlamp switch) Starting/char- ging system Stoplamp switch (top of brake pedal bracket) Tach. sig. Trans press sig-bit 1 Trans press sig-bit 2 Trans press sig-bit 3 Transfer case switch Underhood bussed electrical center Vcm ground Vehicle control module (vcm) (on left front of engine compartment) Vss sig W/ atc
4.8L 4.8L VIN V, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Silverado 1999 2500 List of elements for 4.8L VIN V, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Silverado 1999 2500: 64 (below steering column) data link connector (lower right rear of engine) crankshaft position sensor (right rear of engine) +5v 1995 vftc 3-2 ss Body control module (below steering column) Brk sw C10 C11 C12 Ckp Cls 2 data Clutch sw Cmp Coolant lev D10 E12 Ecm1 fuse 10a Ecmb fuse 20a Ect sig Egr input G117 G117 (right rear of engine) c Gnd Ho2s hi Ho2s lo Hot at all times Hot in run and start Ign Ign 0 fuse 10a Inj1 Inj2 Inj3 Inj4 Inj5 Inj6 Inj7 Inj8 Inja fuse 15a Injb fuse 15a Injectors Ks signal Left bussed electrical center O2a fuse 15a O2b fuse 15a Oil lev Pnk Pnk b Powertrain control module (left front of engine compt) Prnd a Prnd b Prnd p Range b Range c Red Ref low S103 Sens gnd Sens rtn Sp205 (behind headlamp switch) Tan Tan tan Underhood bussed electrical center 4.8L VIN V, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Silverado 1999 2500 List of elements for 4.8L VIN V, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Silverado 1999 2500: 40 (left front of engine) (left rear of engine) (left rear of engine) g114 (not used) 1995 vftc c Air maxi fuse 30a c7 Ecm b fuse 20a Engine coolant level switch (in coolant reservoir) Engine coolant temperature sensor (left front of cylinder head) Engine oil level switch (right side of oil pan) Front knock sensor (under intake manifold) Fuel pump relay Fuel pump/ level sensor (in fuel tank) G104 G110 G114 (left rear of engine) G117 (right rear of engine) G402 (left frame body mount bracket) Heated oxygen sensor (bank 1 sensor 1) (left exh pipe before converter) Heated oxygen sensor (bank 1 sensor 2) (left exh pipe after converter) Heated oxygen sensor (bank 2 sensor 1) (right exh pipe (before converter) Heated oxygen sensor (bank 2 sensor 2) (right exh pipe after converter) Hot at all times Hot in run and start Ign e fuse 10a c2 Nca Park/neutral position switch (left side of transmission) Pnk Rear knock sensor (under intake manifold) Red S103 S104 S104 (in engine harness) S108 Secondary air injection reaction pump (right rear of engine compt) Secondary air injection reaction relay (in underhood bussed electrical center) Secondary air injection reaction solenoid (right rear of engine compt) Tan Throttle position sensor (on throttle body assy) Underhood bussed electrical center 4.8L VIN V, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Silverado 1999 2500 List of elements for 4.8L VIN V, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Silverado 1999 2500: 45 1-2 sol 2-3 sol 3-2 sol A/t fluid pressure manual valve position switch Automatic transaxle Brake fuse 10a Camshaft position sensor (top center rear of engine) Clutch pedal position switch (top of pedal bracket) Evap canister purge valve (top right rear of engine) Evap canister vent valve (right front side of engine) Exhaust gas recirculation valve (top right front of engine) Fuel tank pressure sensor (in fuel tank) G117 (right rear of engine) Gnd Hot in run Hot in run and start 1995 vftc c Iat sensor Ign Ign0 fuse 10a Left bussed elec- trical center Manifold absolute pressure sensor (top rear of engine) Mass airflow sensor (in air intake duct) Mid bussed electrical center N pnk P red Pc sol valve Pnk Pnk a Pnk b Pnk d Red Red e Red/ Rev S103 Signal Stop- lamp switch (top of brake pedal) Tan Tan b Tcc pwm sol Tcc sol Tft sensor Underhood bussed electrical center c2 Vehicle speed sensor (left rear of transmission) Vss adapter (4wd) (left side of trans) 4.8L VIN V, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Silverado 1999 2500 List of elements for 4.8L VIN V, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Silverado 1999 2500: 85 (in engine harness) (left front of engine) g110 (left rear of engine) g114 1-2 ss 1995 vftc c 2-3 ss 4wd low A/c clu A/c req A/c system A10 Air pump Anti-lock brake system (speed signal) Automatic transfer case control module (above c3 headlight switch) Cruise control system Cruise control, instrument cluster systems (speed signal) Cruise eng Ctrl Cyc sw in Egr ctrl Egr gnd Eng1 fuse 10a Evap canp Evap vent Front axle switch Frt axle sw Fuel lev Fuel pmp Fuel sig ctrl G117 (right rear of engine) Gen l Gnd Hot in run and start Iac coil hi Iac coil lo Iat sig Idle air control valve (top of throttle body) Ign Ign ctrl Ign feed Ign1 fuse 10a Ignition coils Instrument cluster Left bussed electrical center Maf sig Malfunction indicator lamp Map sig Mil ctrl Nca Nca nca Pc sol hi Pc sol lo Pnk Pnk d Powertrain control module (left front of engine compt) Prnd c Recirc door Recirc sw Red Red c Ref lo Ref low Rpm out S103 S151 S152 S153 S154 S157 Sens gnd Spark plug Starting/charging system Tan Tcc pwm Tcc sol Tft sens sig Tp sig Trans rng a Transfer case switch Underhood bussed electrical center Vss high Vss low Vss out W/ atc W/ manual 4wd
5.3L 5.3L VIN T, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Silverado 1999 2500 List of elements for 5.3L VIN T, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Silverado 1999 2500: 64 (below steering column) data link connector (lower right rear of engine) crankshaft position sensor (right rear of engine) +5v 1995 vftc 3-2 ss Body control module (below steering column) Brk sw C10 C11 C12 Ckp Cls 2 data Clutch sw Cmp Coolant lev D10 E12 Ecm1 fuse 10a Ecmb fuse 20a Ect sig Egr input G117 G117 (right rear of engine) c Gnd Ho2s hi Ho2s lo Hot at all times Hot in run and start Ign Ign 0 fuse 10a Inj1 Inj2 Inj3 Inj4 Inj5 Inj6 Inj7 Inj8 Inja fuse 15a Injb fuse 15a Injectors Ks signal Left bussed electrical center O2a fuse 15a O2b fuse 15a Oil lev Pnk Pnk b Powertrain control module (left front of engine compt) Prnd a Prnd b Prnd p Range b Range c Red Ref low S103 Sens gnd Sens rtn Sp205 (behind headlamp switch) Tan Tan tan Underhood bussed electrical center 5.3L VIN T, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Silverado 1999 2500 List of elements for 5.3L VIN T, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Silverado 1999 2500: 40 (left front of engine) (left rear of engine) (left rear of engine) g114 (not used) 1995 vftc c Air maxi fuse 30a c7 Ecm b fuse 20a Engine coolant level switch (in coolant reservoir) Engine coolant temperature sensor (left front of cylinder head) Engine oil level switch (right side of oil pan) Front knock sensor (under intake manifold) Fuel pump relay Fuel pump/ level sensor (in fuel tank) G104 G110 G114 (left rear of engine) G117 (right rear of engine) G402 (left frame body mount bracket) Heated oxygen sensor (bank 1 sensor 1) (left exh pipe before converter) Heated oxygen sensor (bank 1 sensor 2) (left exh pipe after converter) Heated oxygen sensor (bank 2 sensor 1) (right exh pipe (before converter) Heated oxygen sensor (bank 2 sensor 2) (right exh pipe after converter) Hot at all times Hot in run and start Ign e fuse 10a c2 Nca Park/neutral position switch (left side of transmission) Pnk Rear knock sensor (under intake manifold) Red S103 S104 S104 (in engine harness) S108 Secondary air injection reaction pump (right rear of engine compt) Secondary air injection reaction relay (in underhood bussed electrical center) Secondary air injection reaction solenoid (right rear of engine compt) Tan Throttle position sensor (on throttle body assy) Underhood bussed electrical center 5.3L VIN T, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Silverado 1999 2500 List of elements for 5.3L VIN T, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Silverado 1999 2500: 45 1-2 sol 2-3 sol 3-2 sol A/t fluid pressure manual valve position switch Automatic transaxle Brake fuse 10a Camshaft position sensor (top center rear of engine) Clutch pedal position switch (top of pedal bracket) Evap canister purge valve (top right rear of engine) Evap canister vent valve (right front side of engine) Exhaust gas recirculation valve (top right front of engine) Fuel tank pressure sensor (in fuel tank) G117 (right rear of engine) Gnd Hot in run Hot in run and start 1995 vftc c Iat sensor Ign Ign0 fuse 10a Left bussed elec- trical center Manifold absolute pressure sensor (top rear of engine) Mass airflow sensor (in air intake duct) Mid bussed electrical center N pnk P red Pc sol valve Pnk Pnk a Pnk b Pnk d Red Red e Red/ Rev S103 Signal Stop- lamp switch (top of brake pedal) Tan Tan b Tcc pwm sol Tcc sol Tft sensor Underhood bussed electrical center c2 Vehicle speed sensor (left rear of transmission) Vss adapter (4wd) (left side of trans) 5.3L VIN T, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Silverado 1999 2500 List of elements for 5.3L VIN T, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Silverado 1999 2500: 85 (in engine harness) (left front of engine) g110 (left rear of engine) g114 1-2 ss 1995 vftc c 2-3 ss 4wd low A/c clu A/c req A/c system A10 Air pump Anti-lock brake system (speed signal) Automatic transfer case control module (above c3 headlight switch) Cruise control system Cruise control, instrument cluster systems (speed signal) Cruise eng Ctrl Cyc sw in Egr ctrl Egr gnd Eng1 fuse 10a Evap canp Evap vent Front axle switch Frt axle sw Fuel lev Fuel pmp Fuel sig ctrl G117 (right rear of engine) Gen l Gnd Hot in run and start Iac coil hi Iac coil lo Iat sig Idle air control valve (top of throttle body) Ign Ign ctrl Ign feed Ign1 fuse 10a Ignition coils Instrument cluster Left bussed electrical center Maf sig Malfunction indicator lamp Map sig Mil ctrl Nca Nca nca Pc sol hi Pc sol lo Pnk Pnk d Powertrain control module (left front of engine compt) Prnd c Recirc door Recirc sw Red Red c Ref lo Ref low Rpm out S103 S151 S152 S153 S154 S157 Sens gnd Spark plug Starting/charging system Tan Tcc pwm Tcc sol Tft sens sig Tp sig Trans rng a Transfer case switch Underhood bussed electrical center Vss high Vss low Vss out W/ atc W/ manual 4wd
EXTERIOR LIGHTS Back-up Lamps Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Back-up Lamps Wiring Diagram for Chevrolet Silverado 1999 2500: 17 (left side of transmission) backup lamp switch A trailer connector (heavy duty) A/t B/u lp fuse 25a B10 Backup lamp switch (part of park/neutral position switch) (left center of transmission) G415 (on spare tire hoist bracket) Hot in run or start Left backup lamp M/t Mirrors system (automatic day/night mirror) Pnk Rear lamps bussing block (front of rear bumber, on crossmember) Right backup lamp Trlr b/u fuse 10a Underhood bussed electrical center Veh b/u fuse 15a
GROUND DISTRIBUTION Ground Distribution Wiring Diagram (1 of 3) for Chevrolet Silverado 1999 2500 List of elements for Ground Distribution Wiring Diagram (1 of 3) for Chevrolet Silverado 1999 2500: 77 (4.3l) (4.3l) g119 (right front of engine) (all gas ex 4.3l) (all other gas) (diesel) (forward lamp harn) 4.3l A c1 A/c A/c automatic recirculating switch Air injection reaction pump Air injection reaction solenoid All other gas Automatic transfer case (atc) control module Auxiliary Battery relay Brake fluid C2 a7 C2 b8 Coil module Compressor clutch Compressor low pressure cycling switch Cruise control module D12 Data link connector (dlc) Electronic brake control module (ebcm) Engine Front axle actuator/ switch Fuel pump relay G102 (on left front body mount) G108 (left radiator support bracket) G110 (4.8l, 5.3l, 6.0l) (left front of engine) G114 (left rear of engine) G117 (4.8l, 5.3l, 6.0l) (right rear of engine) G117 (right rear of engine) Headlamp relay 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) Ign 1 relay Ignition Ignition coils (left bank) (v8 gas only) Ignition coils (right bank) (v8 gas only) Instrument cluster Left battery Left daytime running lamp (drl) Left fog lamp Left horn (low) Left park/ turn lamp Level switch Low washer switch Mass airflow (maf) sensor Mid bussed electrical center (under left side of dash) Motor module Nca Oil level switch Park/ neutral position switch Right battery Right daytime running lamp (drl) Right fog lamp Right horn (v22 only) Right park/ turn lamp S100 S156 (eng harn) S157 (eng harn) Secondary Starter relay Transfer case switch Underhood bussed electrical center (left side of eng compt) Underhood lamp Vehicle control module (vcm)/ powertrain control module (pcm) Vss shield (4.3l) W/atc W/o atc Windshield washer pump Windshield wiper Ground Distribution Wiring Diagram (2 of 3) for Chevrolet Silverado 1999 2500 List of elements for Ground Distribution Wiring Diagram (2 of 3) for Chevrolet Silverado 1999 2500: 62 (base only) (base only) cigar lighter (base only) left mini wedge (door jamb switch) (base only) left power door lock switch (base only) mode door motor (base only) recirculation door motor (base only) right mini wedge (door jamb switch) (base only) temperature door motor (not used) (uplevel only) (uplevel only) automatic transfer case (atc) select switch (uplevel only) cigar lighter 87a A12 A16 Ashtray lamp Automatic day-night rearview mirror w/ compass Automatic transfer case (atc) control module Auxiliary power outlet B12 Blower motor switch/hvac control module Body control module Brake transmission shift interlock solenoid C10 C11 Center high mounted stop/ cargo lamp Courtesy lamp relay Data link connector (dlc) E13 E16 F12 Fog/ cargo lamp switch Full feature seat heated/ memory seat switch G200 (upper left kick panel) Headlamp and panel dimmer switch Headlamp dimmer switch Horn switch Inflatable restraint i/p module switch Instrument cluster Key cylinder switch Left bussed electrical center (lower left side of dash) Left door key switch Left mini wedge (door jamb switch) Left outside power mirror Left power window/ door lock switch Mid bussed electrical center (under left side of dash) Nca Park switch Power door lock switch Power door locks relay Power mirror switch Power window switch Radio Reading lamps Remote control door lock receiver Right power door lock switch Roof beacon switch Selectable ride switch Sp203 Steering column Tow/haul switch Turn/ hazard flasher Ground Distribution Wiring Diagram (3 of 3) for Chevrolet Silverado 1999 2500 List of elements for Ground Distribution Wiring Diagram (3 of 3) for Chevrolet Silverado 1999 2500: 66 (base seat) (diesel) (gas) (heavy duty) trailer connector (light duty) trailer connector A11 Blower motor resistor/ relay assembly C b Door lock switch Driver power seat switch Driver seat belt switch Driver seat bolster switch Driver seat heating element Driver seat lumbar motor Driver seat thermistor Fuel pump/ level sensor fuel pump Full feature seat G203 (upper right kick panel) G300 (under driver's seat) G308 (left side of "b" pillar) G308 (right side of "b" pillar) G415 (on spare tire hoist bracket) G416 (on left frame rail near body mount) Hvac control module I/p compartment lamp Inflatable restraint front end discriminating sensor Inflatable restraint sensing and diagnostic module Left backup lamp Left front shock solenoid valve Left license lamp Left rear shock solenoid valve Left tail/ stoplamp Left turn lamp Light bar ground Memory seat module Mode door motor Nca Passenger heated seat switch Passenger power seat belt switch Passenger seat bolster switch Passenger seat heating element Passenger seat lumbar motor Passenger seat switch Passenger seat thermistor Power seat Power window switch Rear lamps bussing block (front of rear bumper, on crossmember) Rear window def0gger element Recirculation door motor Right backup lamp Right bussed electrical center (lower right side of dash) Right front shock solenoid valve Right license lamp Right mini wedge (door jamb switch) Right outside power mirror Right power window/ door lock switch Right rear shock solenoid valve Right tail/ stoplamp Right turn lamp Roof beacon relay Roof marker lamps S201 (near roof marker lamps) Seat belt switch Temperature door motor Uplevel only Window lock out
HEADLIGHTS Headlight Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Headlight Wiring Diagram for Chevrolet Silverado 1999 2500: 56 A11 Al sens ref Al sens sig Ambient light sensor (on top center of dash) Auto Body control module (lower left side of dash) C1 b4 C1 c3 C1 c7 C2 f7 Drl fuse 10a Drl relay E10 E11 E12 E13 Exterior lamps system (park lamp relay) F2 c1 Flash- to-pass Fog lamp relay Fog lamp switch Fog lp relay Fog lp sw Fog lps fuse 15a Ftp in G108 (on left radiator support) G110 (on left front of engine block) G202 Head Headlamp and panel dimmer switch Headlamp dimmer switch Headlamp relay High High beam Hot at all times Hot in run or start Igne fuse 10a Left drl bulb Left fog lamp Left high beam headlamp Left low beam headlamp Low Lt hdlp fuse 15a Mid bussed electrical center (under left side of dash) On indicator Park Right drl bulb Right fog lamp Right high beam headlamp Right low beam headlamp S100 S101 S102 Splice pack 203 (left side of dash) Tbc fuse 10a Underhood bussed electrical center (left side of engine compt)
HORN Horn Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Horn Wiring Diagram for Chevrolet Silverado 1999 2500: 14 A11 Body control module (below steering column) C1 a9 G108 (on left radiator support bracket) Horn relay Horn relay control Horn switch Hot at all times Left horn (left lower corner of radiator core support) Nca Right horn (right lower corner of radiator core support) S100 S101 Underhood bussed electrical center (left side of engine compt)
INSTRUMENT CLUSTER Instrument Cluster Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Instrument Cluster Wiring Diagram for Chevrolet Silverado 1999 2500: 71 (4.3l) (others) (mil) (not used) (service eng soon) -prndl -trip -odometer -hour meter 4wd ind A10 A11 A12 Abs ind Air bag ind Automatic transfer case control module (left side of dash, above headlight switch) B10 B11 B12 Body control module (lower left side of dash, below steering column) Brake ind Check engine oil press Cruise control module (left rear of eng compt, on firewall) Cruise fuse 10a Cruise ind Data link connector (under left side of dash, below steering column) Electronic brake control module (left side of the inner frame) Engine controls system Engine oil pressure sensor (on left side of oil pan) Exterior lights system Fuel gauge G108 (left radiator support bracket) G117 (right rear of eng) High beam ind Hot at all times Hot in run Hot in run or start Hot in run, bulb test or start Ign 0 fuse 10a Ign 1 fuse 10a Illumination (6 bulbs) Ind lamp Inflatable restraint sensing & diagnostic module (under driver's seat) Instrument cluster Interior lights system Left bussed electrical center Left turn ind Logic Low washer switch (in washer fluid reservoir) Malfunction Message center Mid bussed electrical center Nca Oil gauge Park/neutral position switch (a/t only) (on left side of transmission) Pnk Radio Radio fuse 10a Right turn ind S100 Seat belt ind Serial data cl ii Shift up ind Sp203 (upper left kick panel) g200 Spare Speedometer Splice pack Tach output Tachometer Temp gauge Trans temp gauge Underhood bussed electrical center Vehicle control module or powertrain control module (left front of eng compt) Volts gauge Vss input
INTERIOR LIGHTS Courtesy Lamps Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Courtesy Lamps Wiring Diagram for Chevrolet Silverado 1999 2500: 54 (4.3l) (4.8l, 5.3l, 6.0l) A10 A11 B11 B12 Body control module (on lower left side of dash, below steering column) C10 C12 C9 c2 Cargo lamp Cargo lamp switch Cargo lp sw Courtesy lamp relay Ctsy lp fuse 15a Ctsy lp rly D10 Dome lamp Dome lamp defeat switch Dome lamp switch Dome lp dft Dome lp sw Dr handle sw G110 (left front of engine) G119 (right front of engine) G200 (upper left kick panel) G200 (upper left sp203 G203 (upper right kick panel) Headlamp & panel dimmer switch Hot at all times I/p compart- ment lamp Inadvert rly Inadvertant power relay Kick panel) Lamp request Left bussed electrical center (on lower left side of dash) Left door courtesy lamp Left i/p courtesy lamp Left mini wedge (door jamb switch) Left power window/door lock switch Lt door jamb Mid bussed electrical center (under left side of dash, near left kick panel) Nca Reading lamps Right bussed electrical center (on lower right side of dash) Right door courtesy lamp Right i/p courtesy lamp Right mini wedge (door jamb switch) Rt door jamb S102 Sp203 Tan Underhood bussed electrical center (on left side of engine compt) Underhood lamp assembly Instrument Illumination Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Instrument Illumination Wiring Diagram for Chevrolet Silverado 1999 2500: 50 (4 bulbs) (6 bulbs) A12 Ashtray lamp Auto Automatic transfer case select switch B11 B12 B5 c1 Base Body control module (on lower left side of dash, below steering column) C10 Dim in Driver heated seat switch F12 Fog/ cargo lamp switch G200 (upper left kick panel) G203 (upper right kick panel) Head Headlamp & panel dimmer switch Hot at all times Hvac control module/ blower control switch I/p dim Illum fuse 10a Inflatable restraint i/p module switch Instrument cluster Int prk fuse 10a Left bussed electrical center (on lower left side of dash) Left power door lock switch Left power window switch Left power window/ door lock switch Mid bussed electrical center (under left side of dash, near left kick panel) Parade mode Park Park lp rly Park lp sig Parklamp relay Parl lps fuse 30a Power window switch Radio Right bussed electrical center (on lower right side of dash) Right heated seat switch Right power door lock switch Right power window switch Right power window/door lock switch Roof beacon switch Select- able ride switch Sp203 Underhood bussed electrical center (on left side of engine compt) Up level
MEMORY SYSTEMS Driver's Memory Seat Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Driver's Memory Seat Wiring Diagram for Chevrolet Silverado 1999 2500: 41 A10 B/u lps fuse 25a Back Btsi fuse 10a C14 Driver power seat switch Forward/ rearward motor Front tilt motor Frt dn Frt up Fwd G301 (under driver's seat) Hot at all times Hot in run Ign Ign 3 fuse 10a Left bussed electrical center Left heated/ memory seat switch Left power window/ door lock switch Memory seat module (underside of driver's seat) Mid bussed electrical center Mir/lock fuse 3a Nca Park sw in Park/ neutral position switch (left side of transmission) Pnk Rcl 1 Rcl 1 sw Rcl 2 Rcl 2 sw Rcl back Rcl fwd Rear dn Rear tilt motor Rear up Recliner motor Seats circuit breaker 25a Set Set sw Shift interlock system Underhood bussed electrical center
POWER DISTRIBUTION Power Distribution Wiring Diagram (1 of 4) for Chevrolet Silverado 1999 2500 List of elements for Power Distribution Wiring Diagram (1 of 4) for Chevrolet Silverado 1999 2500: 85 (4.3l) (base) (uplevel) (except 4.3l) (not used) (under left side of dash) mid bussed electrical center (upper left kick panel) A/c compressor relay A/c fuse 10a Abs maxifuse 60a Air maxi- fuse 30a Atc fuse 20a Automatic transfer case Automatic transfer case control module Aux pwr fuse 20a Auxiliary power outlet B12 B12 d2 Bat Battery cable junction block Blower motor resistor/ relay assembly Body control module C1 f2 Cigar fuse 15a Cigar lighter Ctsy lp fuse 15a D11 D12 Data link connector (dlc) Daytime running lamp (drl) relay Drl fuse 10a E nca E10 Ecm b fuse 20a Electronic brake control module (ebcm) F10 F12 Fog lps fuse 15a Foglamp relay From air maxifuse (diagram 1 of 4) From rap maxifuse (diagram 1 of 4) Frt hvac fuse 30a Fuel pump relay Full feature driver seat Full feature passenger seat Fusible link (10 ga- red) G200 Generator Hazard fuse 20a Headlamp and panel dimmer switch Headlamp dimmer switch Headlamp relay Horn relay Inadvertent power relay Instrument cluster L nca Left battery Nca Park lamps fuse 30a Parklamp relay Radio Radio fuse 15a Rap maxifuse 50a Rdo amp fuse 15a Rear defogger relay Red Remote control door lock receiver Roof becon relay Roof becon switch Secondary air injection (air) pump relay Seo 1 fuse 15a Seo 2 fuse 30a Sp203 Starter solenoid Stop lps fuse 20a Stoplamp switch Tbc fuse 10a To auxiliary battery relay (diagram 3 of 4) To ecm b fuse (diagram 1 of 4) To ign a maxifuse (diagram 2 of 4) To left bussed electrical center (mir/lock fuse) (diagram 4 of 4) To park lamps fuse (diagram 1 of 4) Turn/ hazard switch Underhood bussed electrical center (on left side of eng compt) Underhood bussed electrical center (on left side of engine compt) Vehicle control module (vcm)/ powertrain control module (pcm) Power Distribution Wiring Diagram (2 of 4) for Chevrolet Silverado 1999 2500 List of elements for Power Distribution Wiring Diagram (2 of 4) for Chevrolet Silverado 1999 2500: 84 (4.3l) (a/t) (all others) (m/t) (not used) A/c clutch relay A10 A13 Acc Air bag fuse 15a Automatic day-night rearview mirror (w/ compass) Automatic transfer case (atc) select switch Automatic transmission B/u lp fuse 25a B11 Backup lamp switch Body control module Bulb test C10 Camshaft position (cmp) sensor Cellular phone Crank fuse 10a Cruise control module Cruise control switch Cruise fuse 10a Drl relay E11 Eng 1 fuse 10a Evaporative emission (evap) canister purge solenoid Evaporative emission (evap) vent solenoid Ext lps fuse 10a F10 F11 From cigar e Fuse (diagram 1 of 4) 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) Ign 1 fuse 10a Ign a maxifuse 40a Ign b maxifuse 50a Ign c fuse 20a Ign e fuse 10a Ign o fuse 10a Ignition switch Inflatable restraint i/p module switch Inflatable restraint sensing and diagnostic module Instrument cluster Left bussed electrical center (on lower left side of dash) Mass airflow (maf) sensor Mid bussed electrical center (under left side of dash) Nca O2 a fuse 15a O2 b fuse 15a Off Park/ neutral position switch Pnk Rear defog relay Red Retained retained accessory accessory power power relay relay Rr hvac fuse 30a Rr wiper fuse 15a Rr wpr fuse 25a Run Secondary air injection (air) pump relay Selectable ride switch Seo ign fuse 10a Seq accy fuse 10a Start Starter relay Stud 1 Stud 1 maxifuse 40a Stud 2 Stud 2 maxifuse 30a To htr/ a/c fuse (diagram 3 of 4) To ign 1 relay (diagram 3 of 4) Turn fuse 20a Turn/ hazard switch Underhood bussed electrical center (on left side of engine compt) Vehicle control module (vcm)/ powertrain control module (pcm) Windshield washer motor Windshield washer switch Ws wiper fuse 25a Power Distribution Wiring Diagram (3 of 4) for Chevrolet Silverado 1999 2500 List of elements for Power Distribution Wiring Diagram (3 of 4) for Chevrolet Silverado 1999 2500: 78 (4.3l) (all other gas) (all pnk (engine harness) s199 (not used) 4.3l 4wd fuse 15a All other gas Automatic transfer case (atc) control module Auxiliary battery relay Base Brake fuse 10a C10 C11 C12 Clutch pedal position switch Crankshaft position (ckp) sensor D10 E10 E12 Ecm 1 fuse 10a Electronic brake control module (ebcm) Etc fuse 15a From cruise fuse (diagram 2 of 4) From eng 1 fuse (diagram 2 of 4) From fuse link (diagram 1 of 4) From ign c fuse (diagram 2 of 4) Front axle actuator/ switch Fuel injector 1 Fuel injector 2 Fuel injector 3 Fuel injector 4 Fuel injector 5 (all gas) Fuel injector 6 Fuel injector 7 (4.8l, 5.3l, 6.0l only) Fuel injector 8 G114 (left rear of engine) Htr/ a/c fuse 25a Hvac 1 fuse 10a Hvac blower motor switch Hvac control module Ign 1 relay Ign 3 fuse 10a Ignition coil 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 coil module Inj a fuse 15a Inj b fuse 15a Left bussed electrical center (on lower left side of dash) Mega fuse 125a Memory seat module Memory seat switch Mode door motor Nca Other gas) Pnk Recirculation door motor Red Right battery Right bussed electrical center (on lower right side of dash) Right heated seat switch S102 S104 S152 (eng pnk harn) S154 (eng pnk harn) Stoplamp switch Temperature door motor Underhood bussed electrical center (on left side of engine compt) Uplevel Vehicle control module (vcm) (4.3l) Vehicle control module (vcm)/ powertrain control module (pcm) Power Distribution Wiring Diagram (4 of 4) for Chevrolet Silverado 1999 2500 List of elements for Power Distribution Wiring Diagram (4 of 4) for Chevrolet Silverado 1999 2500: 30 A10 Base C14 Door lock fuse 20a Driver door unlock relay (w/ rke) From rap maxifuse (diagram 1 of 4) Left bussed electrical center (on lower left side of dash) Left full feature seat Left memory seat switch Left power door lock switch Left power seat Left power seat switch Left power window/ door lock switch Memory seat switch Mid bussed electrical center (under left side of dash) Mir/ lock fuse 3a Nca Power door lock relay Power door unlock relay Power mirror switch Red Retained accessory power relay Right full feature seat Right memory seat switch Right power door lock switch Right power seat Right power seat switch Right power window/ door lock switch Seats circuit breaker 25a Uplevel
POWER DOOR LOCKS Power Door Lock Wiring Diagram, Base for Chevrolet Silverado 1999 2500 List of elements for Power Door Lock Wiring Diagram, Base for Chevrolet Silverado 1999 2500: 36 87a A12 B11 B12 Body control module (on lower left side of dash, below steering column) C1 a11 C1 b8 C1 f4 C11 C4 a C4 d C4 m Door lock relay Dr lk rly Dr lock fuse 20a Dr unlk rly Driver door unlock relay Drv dr unlk rly E10 F12 G200 (upper left kick panel) Hot at all times Left bussed electrical center (on lower left side of dash) Left power door lock actuator Left power window/door lock switch Lock Lock fuse 15a Mir/ lock fuse 3a Right bussed electrical center (on lower right side of dash) Right power door lock actuator Right power window/door lock switch Splice pack Tan Unlock Unlock fuse 15a Unlock jmpr fuse 30a Power Door Lock Wiring Diagram, Up Level for Chevrolet Silverado 1999 2500 List of elements for Power Door Lock Wiring Diagram, Up Level for Chevrolet Silverado 1999 2500: 38 87a A12 B11 B12 Body control module (on lower left side of dash, below steering column) C1 a11 C1 a12 C1 b8 C1 f2 C1 f4 C11 C4 a C4 d C4 m Door lock relay Dr lock fuse 20a Driver door unlock relay E10 F12 G200 (upper left kick panel) Hot at all times Left bussed electrical center (on lower left side of dash) Left power door lock actuator Left power window/door lock switch Lock Lock fuse 15a Mid bussed electrical center (near left kick panel) Mir/lock fuse 3a Remote control door lock receiver (top center of dash, near instrument cluster) Right bussed electrical center (on lower right side of dash) Right power door lock actuator Right power window/door lock switch Splice pack Tan Tbc fuse 10a Underhood bussed electrical center (on left side of engine compt) Unlock Unlock fuse 15a
POWER MIRRORS Electrochromic Mirror Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Electrochromic Mirror Wiring Diagram for Chevrolet Silverado 1999 2500: 17 A pnk A/t A11 Automatic day-night rearview mirror B/u lp fuse 25a B10 Back-up lamp switch (left side of trans) Back-up lamp switch (left side of trans) c2 G200 (upper left kick panel) Hot in run and start Ign 1 fuse 10a Left bussed electrical center M/t Mid bussed electrical center Pnk Underhood bussed electrical center Veh b/u fuse 15a Power Mirror Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Power Mirror Wiring Diagram for Chevrolet Silverado 1999 2500: 19 (upper left kick panel) Down G200 Horiz Hot at all times Interior lights system Left Left bussed electrical center (lower left side of dash) Left mirror motor Left power window/ door lock switch c1 Left power window/ door lock switch Mir/ lock fuse 3a Nca Off Power mirror switch Right Right mirror motor Right/ left select switch Vert
POWER SEATS 6-Way Power Seat Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for 6-Way Power Seat Wiring Diagram for Chevrolet Silverado 1999 2500: 22 (under driver's seat) A10 Back C10 C14 Driver power seat adjuster switch Forward/ rearward motor Front dn Front tilt motor Front up Fwd G300 Hot at all times Left bussed electrical center (on lower left side of dash) Mid bussed electrical center (under left side of dash) Passenger power seat adjuster switch Rear dn Rear tilt motor Rear up S307 Seat circuit breaker 25a Tan Heated Seats Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Heated Seats Wiring Diagram for Chevrolet Silverado 1999 2500: 36 D12 Driver heated seat relay (in driver seat) Driver seat heated switch Driver seat heater element (seat back) Driver seat heater element (seat) Driver seat thermistor G200 (upper left kick panel) G203 (upper right kick panel) G300 (under driver's seat) Gnd Heater on ind Hot at all times Hot in run Ign 3 fuse 10a Illum Interior lights system Left bussed electrical center (on left side of eng compt) Left bussed electrical center (on lower left side of dash) Left power window door lock switch Mid bussed electrical center (under left side of dash) Nca Passenger heated seat relay (in passenger seat) Passenger heated seat switch Passenger seat heater element (seat back) Passenger seat heater element (seat) Passenger seat thermistor Right bussed electrical center (lower right side of dash) Right bussed electrical center (on lower right side of dash) S308 S309 Sensor Seo 2 fuse 30a Solid state Sp203 Underhood bussed electrical center (on left side of eng compt) Underhood bussed electrical center (on lower left side of dash) Lumbar Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Lumbar Wiring Diagram for Chevrolet Silverado 1999 2500: 21 A10 Bolster motor C10 C14 Driver lumbar/ system switch G300 (under driver's seat) Hot at all times Left bussed electrical center (on lower left side of dash) Lumbar motor Mid bussed electrical center (under left side of dash) Nca Out Pass- enger lumbar/ system switch Pnk Power seats circuit S308 S309 S310 S311 Seat circuit breaker 25a Tan
POWER WINDOWS Power Window Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Power Window Wiring Diagram for Chevrolet Silverado 1999 2500: 20 87a Down G200 (upper left kick panel) G203 (upper right kick panel) Hot acc and run, or with rap energized Left bussed electrical center (on lower left side of dash) Left down Left power window switch Left power window/ door lock switch Left up Pwr wdo circuit breaker 25a Right bussed electrical center (on lower right side of dash) Right down Right power window switch Right power window/ door lock switch Right up Sp203 Tan Wdo dn relay Wdo up relay
RADIO Radio Wiring Diagrams for Chevrolet Silverado 1999 2500 List of elements for Radio Wiring Diagrams for Chevrolet Silverado 1999 2500: 57 4.3l Antenna Audio rtn Bare Base Battery Cruise control module D10 D12 Dim sig in Dim sig out Dimmer Drain E&c line Except 4.3l G200 (upper left kick panel) Ground Hot at all times Hot with rap relay energized Ignition Instrument cluster Interior lights system J c4 Left bussed electrical center (on lower left side of dash) Left front door speaker Left rear speaker Lf + Lf - Lr + Lr - Lt input Lt output Mid bussed electrical center (near left kick panel) Nca Park lps Pnk Powertrain control module (left front of engine compt) Premium R14 in R14 out Radio Radio fuse 15a Rao i fuse 10a Remote compact disk player Rf + Rf - Right front door speaker Right rear speaker Rr + Rr - Rt input Rt output Sp203 Tan Underhood bussed electrical center (on left side of engine compt) Vehicle control module (left front of engine compt) Vss signal
SHIFT INTERLOCKS Shift Interlock Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Shift Interlock Wiring Diagram for Chevrolet Silverado 1999 2500: 15 (upper left kick panel) A/t shift lock control solenoid (on steering column) A16 A17 B/u lps fuse 25a Btsi fuse 10a G200 Hot in run or start Memory systems Nca Park/ neutral position switch (left side of transmission) Pnk Splice pack Stoplamp switch (top of brake pedal) Underhood junction block
STARTING/CHARGING Charging Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Charging Wiring Diagram for Chevrolet Silverado 1999 2500: 33 (left front of engine compt) vehicle control module/ powertrain control module 4.3l 4.8l, 5.3l, 6.0l Battery cable junction block C1 c9 pnk C2 b8 Charge ind Computer data lines Diesel Fusible link (10 ga- red) (gas) G108 (left radiator support bracket) G110 (4.8l, 5.3l, 6.0l) (left front of engine) G110 (4.8l, 5.3l, 6.0l) (right rear of engine) G117 (right rear of engine) G119 (4.3l) (right front of engine) Gas Generator Generator f terminal Generator l terminal Hot in run or start Ign 1 fuse 10a Instrument cluster Left battery Left bussed electrical center (lower left side of dash) Mid bussed electrical center (under left side of dash) Not used Pnk d8 Power distribution system Red Right battery (diesel) Solid state Splice pack Starter solenoid Starting Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Starting Wiring Diagram for Chevrolet Silverado 1999 2500: 40 A/t Accy Battery cable junction block Bulb test C1 a6 C1 c10 C2 f10 C7 a C7 b Clutch pedal position switch (top of clutch pedal) Crank fuse 10a D11 F11 Fusible link (10 ga- red) G108 (left radiator support bracket) G110 (4.8l, 5.3l, 6.0l) (left front of engine) G114 (left rear of engine) G119 (4.3l) (right front of engine) Hold- in coil Ign a fuse 40a Ign c fuse 20a Ignition switch Left battery Left bussed electrical center (lower left side of dash) Lock M/t Mid bussed electrical center (under left side of dash) Nca Off Park/ neutral position switch (left side of transmission) Power distribution system Pull- in coil Red Run S102 Start Starter motor Starter motor relay Starter solenoid Underhood bussed electrical center (left side of engine compt)
SUPPLEMENTAL RESTRAINTS Supplemental Restraint Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Supplemental Restraint Wiring Diagram for Chevrolet Silverado 1999 2500: 41 (under left side of dash) data link connector (dlc) A11 Air bag fuse 15a Air bag ind Cluster Data line Driver high Driver low G200 (upper left kick panel) G300 (under driver's seat) Ground Hot in run or start Hot w/ headlamp switch in park or headlamp Ign 1 fuse 10a Ignition Illum fuse 10a Indicator lamp Inflatable restraint front end discriminating sensor (on underside of radiator support) Inflatable restraint i/p module (right side of dash) Inflatable restraint i/p module switch Inflatable restraint sensing and diagnostic module (under driver's seat) Inflatable restraint steering wheel module (steering wheel) Inflatable restraint steering wheel module coil Instrument Interior lights system Left bussed electrical center (on lower left side of dash) Logic Mid bussed electrical center (under left side of dash) Nca Pass disable Pass enable Pass high Pass low Pnk Seat belt sig Seat belt switch (on driver's seat belt buckle) Sensor feed Shorting bar Solid state Tan W/ power seats
TRANSMISSION
4.3L 4.3L VIN W, A/T Wiring Diagram, 4L60-E for Chevrolet Silverado 1999 2500 List of elements for 4.3L VIN W, A/T Wiring Diagram, 4L60-E for Chevrolet Silverado 1999 2500: 79 (in engine harness) s107 (left side of dash) splice pack sp205 (left side of engine compt) (not used) a (right rear of engine) +5v 1-2 shift solenoid 1-2 ss 2-3 shift solenoid 2-3 ss 3-2 ctrl solenoid 3-2 ss 4wd circuit (front axle & transfer case switch) 4wd low A/t fluid pressure manual valve position switch A12 Automatic transmission (4l60-e) Body control module (on lower left side of dash, below steering column) Brake fuse 10a Brk sw C11 Cls 2 data D3, d2 D4, d2 Data link connector (under left side of dash) Ecm1 fuse 10a Ecmb fuse 20a Ect sig Engine controls Engine coolant temperature sensor (left rear of cylinder head) Fluid temp sensor Frt axle sw G117 G117 (right rear of engine) Gnd Harness) s105 Hot at all times Hot in run Hot in run & start Ign Ign0 fuse 10a Ign1 fuse 10a Instrument cluster Left bussed electrical center (lower left side of dash) Left side of dash) Malfunction indicator lamp Mid bussed electrical center (lower c1 Mil ctrl Park/neutral position switch (left side of transmission) Pc sol hi Pc sol lo Pnk Press ctrl solenoid Prnd a Prnd b Prnd c Prnd p Range b Range c Red Return Rev, lo S103 Stoplamp switch (top of brake pedal) Tan Tcc pwm Tcc pwm solenoid Tcc sol Tcc solenoid Tft sens sig Throttle position sensor (on throttle body assy) Tp sig Trans rng a Underhood bussed electrical center (left side of engine compt) Underhood bussed electrical center c2 Vehicle control module (left front of engine compt) Vehicle speed sensor (left rear of transmission) Vss high Vss low Transfer Case Wiring Diagram, Electronic for Chevrolet Silverado 1999 2500 List of elements for Transfer Case Wiring Diagram, Electronic for Chevrolet Silverado 1999 2500: 84 (left front of engine compt) powertrain control module (left front of engine compt) vehicle control module (on left front body mount) g102 (under left side of dash) data link connector +8v ref +8v ref out 2-hi ind 4-hi ind 4-lo ind 4.3l 4.8l, 5.3l & 6.0l 4wd fuse 15a 4wd indicator lamp 4wd sw (lo) 4wd sw sig 4wd whl lock Atc fuse 20a Auto Automatic transfer case control module (left side of dash, above headlamp switch) Auxiliary battery relay Awd ind Brake control Channel-a Channel-b Channel-c Channel-p Class ii data Ctrl E10 E11 E12 E13 E14 E15 E16 Encoder logic Encoder motor Encoder rtn F10 F11 F12 F13 F14 F15 F16 Front axle actuator/ switch Front drive shaft speed sensor Ft axle ctrl Ft shaft rtn Ft shaft sig G102 (on left front body mount) G200 (upper left kick panel) Gnd Hot at all times Hot in run Hot in run & start Ign 3 (run) Ign1 fuse 10a Illumination lamp (2) Instrument cluster Interior lights system Left bussed electrical center (lower left side of dash) Left side of dash) Lock sol out Logic Mid bussed electrical center (lower c1 Module gnd Motor (ccw) Motor (cw) Nca Neutral ind Pnk Rear drive shaft speed sensor Red Rr shaft rtn Rr shaft sig S199 Shift motor Solid state Splice pack sp203 Splice pack sp205 (left side of dash) Tan Transfer case select switch Underhood bussed electrical center (left side of engine compt) Transfer Case Wiring Diagram, Manual for Chevrolet Silverado 1999 2500 List of elements for Transfer Case Wiring Diagram, Manual for Chevrolet Silverado 1999 2500: 25 (left side of engine compt) (under left side of dash) data link connector 4.3l 4.8l, 5.3l & 6.0l 4wd fuse 15a 4wd indicator lamp Auxiliary battery relay C2 underhood bussed electrical center c2 Electronic brake control module Front axle actuator/ switch G102 (on left front body mount) Hot in run Hot in run & start Ign1 fuse 10a Instrument cluster Left bussed electrical center (lower left side of dash) Left side of dash) Logic Mid bussed electrical center (lower c1 Pnk Powertrain control module (left front of engine compt) S199 Splice pack sp205 (left side of dash) Transfer case switch (top left of transfer case) Vehicle control module (left front of engine compt)
4.8L 4.8L VIN V, A/T Wiring Diagram, 4L60-E for Chevrolet Silverado 1999 2500 List of elements for 4.8L VIN V, A/T Wiring Diagram, 4L60-E for Chevrolet Silverado 1999 2500: 76 (left side of engine compt) (not used) a +5v 1-2 shift solenoid 1-2 ss 2-3 shift solenoid 2-3 ss 3-2 ctrl solenoid 3-2 ss 4wd circuit (front axle & transfer case switch) 4wd low A/t fluid pressure manual valve position switch A10 A12 Automatic transmission (4l60-e) Body control module (on lower left side of dash, below steering column) Brake fuse 10a Brk sw C11 Cls 2 data D3, d2 D4, d2 Data link connector (under left side of dash) Ecm1 fuse 10a Ecmb fuse 20a Ect sig Engine coolant temperature sensor (left front of cylinder head) Fluid temp sensor Frt axle sw G117 (right rear of engine) Gnd Hot at all times Hot in run Hot in run & start Ign Ign0 fuse 10a Ign1 fuse 10a Instrument cluster Left bussed electrical center (lower left side of dash) Left side of dash) Malfunction indicator lamp Mid bussed electrical center (lower c1 Mil ctrl Park/neutral position switch (left side of transmission) Pc sol hi Pc sol lo Pnk Powertrain control module (left front of engine compt) Press ctrl solenoid Prnd a Prnd b Prnd c Prnd p Range b Range c Red Rev, lo S103 Sens gnd Splice pack sp205 (left side of dash) Stoplamp switch (top of brake pedal) Tan Tcc pwm Tcc pwm solenoid Tcc sol Tcc solenoid Tft sens sig Throttle position sensor (on throttle body assy) Tp sig Trans rng a Underhood bussed electrical center (left side of engine compt) Underhood bussed electrical center c2 Vehicle speed sensor (left rear of transmission) Vss adapter (4wd) (left side of trans) Vss high Vss low Transfer Case Wiring Diagram, Electronic for Chevrolet Silverado 1999 2500 List of elements for Transfer Case Wiring Diagram, Electronic for Chevrolet Silverado 1999 2500: 84 (left front of engine compt) powertrain control module (left front of engine compt) vehicle control module (on left front body mount) g102 (under left side of dash) data link connector +8v ref +8v ref out 2-hi ind 4-hi ind 4-lo ind 4.3l 4.8l, 5.3l & 6.0l 4wd fuse 15a 4wd indicator lamp 4wd sw (lo) 4wd sw sig 4wd whl lock Atc fuse 20a Auto Automatic transfer case control module (left side of dash, above headlamp switch) Auxiliary battery relay Awd ind Brake control Channel-a Channel-b Channel-c Channel-p Class ii data Ctrl E10 E11 E12 E13 E14 E15 E16 Encoder logic Encoder motor Encoder rtn F10 F11 F12 F13 F14 F15 F16 Front axle actuator/ switch Front drive shaft speed sensor Ft axle ctrl Ft shaft rtn Ft shaft sig G102 (on left front body mount) G200 (upper left kick panel) Gnd Hot at all times Hot in run Hot in run & start Ign 3 (run) Ign1 fuse 10a Illumination lamp (2) Instrument cluster Interior lights system Left bussed electrical center (lower left side of dash) Left side of dash) Lock sol out Logic Mid bussed electrical center (lower c1 Module gnd Motor (ccw) Motor (cw) Nca Neutral ind Pnk Rear drive shaft speed sensor Red Rr shaft rtn Rr shaft sig S199 Shift motor Solid state Splice pack sp203 Splice pack sp205 (left side of dash) Tan Transfer case select switch Underhood bussed electrical center (left side of engine compt) Transfer Case Wiring Diagram, Manual for Chevrolet Silverado 1999 2500 List of elements for Transfer Case Wiring Diagram, Manual for Chevrolet Silverado 1999 2500: 25 (left side of engine compt) (under left side of dash) data link connector 4.3l 4.8l, 5.3l & 6.0l 4wd fuse 15a 4wd indicator lamp Auxiliary battery relay C2 underhood bussed electrical center c2 Electronic brake control module Front axle actuator/ switch G102 (on left front body mount) Hot in run Hot in run & start Ign1 fuse 10a Instrument cluster Left bussed electrical center (lower left side of dash) Left side of dash) Logic Mid bussed electrical center (lower c1 Pnk Powertrain control module (left front of engine compt) S199 Splice pack sp205 (left side of dash) Transfer case switch (top left of transfer case) Vehicle control module (left front of engine compt)
5.3L 5.3L VIN T, A/T Wiring Diagram, 4L60-E for Chevrolet Silverado 1999 2500 List of elements for 5.3L VIN T, A/T Wiring Diagram, 4L60-E for Chevrolet Silverado 1999 2500: 76 (left side of engine compt) (not used) a +5v 1-2 shift solenoid 1-2 ss 2-3 shift solenoid 2-3 ss 3-2 ctrl solenoid 3-2 ss 4wd circuit (front axle & transfer case switch) 4wd low A/t fluid pressure manual valve position switch A10 A12 Automatic transmission (4l60-e) Body control module (on lower left side of dash, below steering column) Brake fuse 10a Brk sw C11 Cls 2 data D3, d2 D4, d2 Data link connector (under left side of dash) Ecm1 fuse 10a Ecmb fuse 20a Ect sig Engine coolant temperature sensor (left front of cylinder head) Fluid temp sensor Frt axle sw G117 (right rear of engine) Gnd Hot at all times Hot in run Hot in run & start Ign Ign0 fuse 10a Ign1 fuse 10a Instrument cluster Left bussed electrical center (lower left side of dash) Left side of dash) Malfunction indicator lamp Mid bussed electrical center (lower c1 Mil ctrl Park/neutral position switch (left side of transmission) Pc sol hi Pc sol lo Pnk Powertrain control module (left front of engine compt) Press ctrl solenoid Prnd a Prnd b Prnd c Prnd p Range b Range c Red Rev, lo S103 Sens gnd Splice pack sp205 (left side of dash) Stoplamp switch (top of brake pedal) Tan Tcc pwm Tcc pwm solenoid Tcc sol Tcc solenoid Tft sens sig Throttle position sensor (on throttle body assy) Tp sig Trans rng a Underhood bussed electrical center (left side of engine compt) Underhood bussed electrical center c2 Vehicle speed sensor (left rear of transmission) Vss adapter (4wd) (left side of trans) Vss high Vss low Transfer Case Wiring Diagram, Electronic for Chevrolet Silverado 1999 2500 List of elements for Transfer Case Wiring Diagram, Electronic for Chevrolet Silverado 1999 2500: 84 (left front of engine compt) powertrain control module (left front of engine compt) vehicle control module (on left front body mount) g102 (under left side of dash) data link connector +8v ref +8v ref out 2-hi ind 4-hi ind 4-lo ind 4.3l 4.8l, 5.3l & 6.0l 4wd fuse 15a 4wd indicator lamp 4wd sw (lo) 4wd sw sig 4wd whl lock Atc fuse 20a Auto Automatic transfer case control module (left side of dash, above headlamp switch) Auxiliary battery relay Awd ind Brake control Channel-a Channel-b Channel-c Channel-p Class ii data Ctrl E10 E11 E12 E13 E14 E15 E16 Encoder logic Encoder motor Encoder rtn F10 F11 F12 F13 F14 F15 F16 Front axle actuator/ switch Front drive shaft speed sensor Ft axle ctrl Ft shaft rtn Ft shaft sig G102 (on left front body mount) G200 (upper left kick panel) Gnd Hot at all times Hot in run Hot in run & start Ign 3 (run) Ign1 fuse 10a Illumination lamp (2) Instrument cluster Interior lights system Left bussed electrical center (lower left side of dash) Left side of dash) Lock sol out Logic Mid bussed electrical center (lower c1 Module gnd Motor (ccw) Motor (cw) Nca Neutral ind Pnk Rear drive shaft speed sensor Red Rr shaft rtn Rr shaft sig S199 Shift motor Solid state Splice pack sp203 Splice pack sp205 (left side of dash) Tan Transfer case select switch Underhood bussed electrical center (left side of engine compt) Transfer Case Wiring Diagram, Manual for Chevrolet Silverado 1999 2500 List of elements for Transfer Case Wiring Diagram, Manual for Chevrolet Silverado 1999 2500: 25 (left side of engine compt) (under left side of dash) data link connector 4.3l 4.8l, 5.3l & 6.0l 4wd fuse 15a 4wd indicator lamp Auxiliary battery relay C2 underhood bussed electrical center c2 Electronic brake control module Front axle actuator/ switch G102 (on left front body mount) Hot in run Hot in run & start Ign1 fuse 10a Instrument cluster Left bussed electrical center (lower left side of dash) Left side of dash) Logic Mid bussed electrical center (lower c1 Pnk Powertrain control module (left front of engine compt) S199 Splice pack sp205 (left side of dash) Transfer case switch (top left of transfer case) Vehicle control module (left front of engine compt)
WARNING SYSTEMS Warning System Wiring Diagrams for Chevrolet Silverado 1999 2500 List of elements for Warning System Wiring Diagrams for Chevrolet Silverado 1999 2500: 51 (3.4l) (all others) (base seat) (full feature seat) (pwr seat) A11 A12 B11 Base Battery Body control module (on lower left side of dash, below steering column) C10 C11 Cruise fuse 10a Door jamb sw in F10 G200 (upper left kick panel) G300 (under driver's seat) Ground Hdlmp rly cntrl Head- lamp and panel dimmer switch Hot at all times Hot in accy or run Hot in run Hot with park lights on Ign 1 fuse 10a Ignition 1 Ignition 3 Instrument cluster Int prk fuse 10a Key in ign Key-in ignition switch Left bussed electrical center Left mini wedge switch Left power window/ door lock switch Logic Mid bussed electrical center Nca Park lights in Pnk Powertrain control module (pcm) (left frt of eng compt) Seat belt ind Seat belt input Seat belt switch (on driver's seat belt buckle) (base seat) Serial data Sp203 Sp205 (left side of dash) Tan Tbc fuse 10a Underhood bussed electrical center Uplevel
WIPER/WASHER Wiper/Washer Wiring Diagram for Chevrolet Silverado 1999 2500 List of elements for Wiper/Washer Wiring Diagram for Chevrolet Silverado 1999 2500: 22 Control logic G108 (left radiator support bracket) G114 (left rear of engine) Hot in acc or run Left bussed electrical center (on lower left side of dash) Mist Nca Off Pnk Pulse Red S100 S102 Underhood bussed electrical center Underhood bussed electrical center (on left side of engine compt) W/w pmp fuse 15a Washer switch Wind- shield wiper/ washer switch Windshield washer pump (in washer fluid reservoir) Windshield wiper motor module Wiper switch Ws wiper fuse 25a
