AIR CONDITIONING – GMC Savana Special G3500 1999 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

5.7L

5.7L VIN R, Compressor Wiring Diagram for GMC Savana Special G3500 1999

List of elements for 5.7L VIN R, Compressor Wiring Diagram for GMC Savana Special G3500 1999:

• (in eng harness) s101 (7.4l) (in eng harness)
• (in eng harness) s103 (5.0l, 5.7l, 7.4l) (in eng harness)
• A/c
• A/c compress0r high pressure cutoff switch (rear of a/c compressor)
• A/c compress0r low pressure cutoff switch (in refrigerant line)
• A/c compressor clutch coil
• A/c compressor enable relay (in underhood fuse/relay center)
• A/c fuse 10a
• Bi-lev
• Blnd
• Def
• G103 (right side of engine)
• Heat
• Hot at all times
• Hot in run
• Hot in run or start
• Htr-a/c fuse 12 20a
• Hvac control module
• I/p fuse block
• Ign e fuse 10a
• Max
• Off
• Pnk
• S215 (i/p harn, 4 cm from radio breakout)
• Underhood fuse/relay center
• Vehicle control module (left side of engine compartment)
• Vent

5.7L VIN R, Heater Wiring Diagram for GMC Savana Special G3500 1999

List of elements for 5.7L VIN R, Heater Wiring Diagram for GMC Savana Special G3500 1999:

• (i/p harness, 4 cm from radio breakout)
• (left rear of cabin, behind rear wheelwell)
• (rear a/c harness, 13 cm from blower motor resistor breakout)
• (rear a/c harness, 7 cm from blower motor resistor breakout)
• (rear a/c harness,7 cm from blower motor resistor breakout)
• (school bus)
• Auxiliary blower motor (left rear of cabin, behind rear wheelwell)
• Auxiliary blower motor high speed relay
• Auxiliary blower motor low speed relay
• Auxiliary blower motor medium speed relay
• Auxiliary blower motor resistor (left rear of cabin, behind rear wheelwell)
• Auxiliary blower motor switch
• Blend
• Blower fuse 60a
• Blower motor
• Blower motor resistor/relay (right side of front blower motor)
• C1 f
• C2 c
• C202
• Convenience center
• Def
• G103 (right side of engine)
• G201 (behind left kick panel)
• G301 (left rear of vehicle) g400 (left rear of vehicle)
• Heat
• Heater controller
• Hot at all times
• Hot in run
• Hot in run or start
• Htr-a/c fuse 12 20a
• I/p fuse block
• Interior lights system
• Med
• Off
• Red
• Rr blower fuse 30a
• Rr hvac fuse 24 10a
• S202 (dash harn, in vssb breakout)
• S215
• S327 (left rear of vehicle)
• S400 (left body harness, near chmsl)
• S405
• S412
• S413
• Tan
• Temperature valve actuator motor (on hvac plenum)
• Underhood fuse/relay center
• Vent

5.7L VIN R, Manual A/C Wiring Diagram, Cargo Van for GMC Savana Special G3500 1999

List of elements for 5.7L VIN R, Manual A/C Wiring Diagram, Cargo Van for GMC Savana Special G3500 1999:

• (aux hvac harn, 14 cm from aux hvac module breakout)
• (below dash, right side of hvac plenum) temperature valve actuator motor
• (i/p harn, 4 cm from radio breakout)
• (i/p harn, 7 cm from vssb breakout)
• (in engine harness)
• (in underhood fuse/relay center)
• (left body harn, left side of cabin)
• (left rear interior)
• (left rear of cabin, behind rear wheelwell)
• (left rear of vehicle)
• (rear a/c harn, 7 cm from blower motor resistor breakout)
• (rear a/c harn, 7 cm from o/s air vlv actuator breakout)
• (rear a/c harness, 13 cm from blower motor resistor/relay breakout)
• (rear aux hvac harn, 29 cm from rear aux hvac module breakout)
• A/c
• A/c compressor clutch coil
• A/c compressor enable relay (in underhood fuse/relay center)
• A/c compressor high pressure cutoff switch (rear of a/c compressor)
• A/c compressor low pressure cutoff switch (in refrigerant line)
• A/c fuse 10a
• Auxiliary blower motor
• Auxiliary blower motor high speed relay
• Auxiliary blower motor low speed relay
• Auxiliary blower motor medium speed relay
• Auxiliary blower motor resistor (left rear of cabin, behind rear wheelwell)
• Bi-lev
• Blend
• Blower fuse 60a
• Blower motor
• Blower motor resistor/relay (right side of front blower motor)
• C2 c
• C202
• C3 d3
• Convenience center
• D3 c3
• Def
• Diode
• Front auxiliary hvac control module (on front of overhead console)
• G103 (right side of engine)
• G201 (left kick panel)
• G400
• Heat
• Heater and a/c controller
• Hot at all times
• Hot in run
• Hot in run or start
• Htr-a/c fuse 12 20a
• I/p fuse block
• Ign e fuse 10a
• Interior lights system
• Max
• Med
• Off
• Pnk
• Rear auxiliary mode valve and seal assy (left rear interior)
• Rear auxiliary temperature
• Red
• Rr blower fuse 30a
• Rr hvac fuse 24 10a
• S202
• S215
• S307
• S318
• S404
• S405 (rear a/c harn, 7 cm from blower resistor breakout)
• S411
• S412
• S413
• Tan
• Temp
• Under- hood fuse/ relay center
• Valve assy
• Vehicle control module (left side of engine compartment)
• Vent
• Vent mode

5.7L VIN R, Manual A/C Wiring Diagram, Passenger Van for GMC Savana Special G3500 1999

List of elements for 5.7L VIN R, Manual A/C Wiring Diagram, Passenger Van for GMC Savana Special G3500 1999:

• (aux hvac harn, 14 cm from aux hvac module breakout)
• (aux hvac harn, 26 cm from aux hvac module breakout)
• (aux hvac harn, 57 cm from aux hvac module breakout)
• (below dash, right side of hvac plenum) temperature valve actuator motor
• (front interior roof panel)
• (i/p harn, 7 cm from vssb breakout)
• (i/p harn, 4 cm from radio breakout) s215
• (in engine harness)
• (in underhood fuse/relay center)
• (left body harn, left side of cabin)
• (left rear interior)
• (left rear of cabin, behind rear wheelwell)
• (rear a/c harn, 7 cm from blower motor resistor breakout)
• (rear a/c harn, 7 cm from o/s air vlv actuator breakout)
• (rear a/c harness, 13 cm from blower motor resistor/relay breakout)
• (rear aux hvac harn, 29 cm from rear aux hvac module breakout)
• (rear hvac harn, 13 cm from aux hvac module breakout)
• A/c
• A/c compressor clutch coil
• A/c compressor enable relay (in underhood fuse/relay center)
• A/c compressor high pressure cutoff switch (rear of a/c compressor)
• A/c compressor low pressure cutoff switch (in refrigerant line)
• A/c fuse 10a
• Auxiliary blower motor
• Auxiliary blower motor high speed relay
• Auxiliary blower motor low speed relay
• Auxiliary blower motor medium speed relay
• Auxiliary blower motor resistor (left rear of cabin, behind rear wheelwell)
• Bi-lev
• Blend
• Blower fuse 60a
• Blower motor
• Blower motor resistor/relay (right side of front blower motor)
• C2 c
• C202
• Convenience center
• Def
• Diode
• Front auxiliary hvac control module
• G103 (right side of engine)
• G201 (left kick panel)
• G400 (left rear of vehicle)
• Heat
• Heater and a/c control logic module
• Heater and a/c controller
• Hot at all times
• Hot in run
• Hot in run or start
• Htr-a/c fuse 12 20a
• I/p fuse block
• Ign e fuse 10a
• Interior lights system
• Max
• Med
• Off
• Pnk
• Rear auxiliary hvac control module
• Rear auxiliary mode valve and seal assy (left rear interior)
• Rear auxiliary temperature
• Red
• Rr blower fuse 30a
• Rr ctrl
• Rr hvac fuse 24 10a
• S202
• S307
• S318
• S319
• S320
• S321
• S404
• S405 (rear a/c harn, 7 cm from blower resistor breakout)
• S411
• S412
• S413
• Tan
• Temp
• Under- hood fuse/ relay center
• Valve assy
• Vehicle control module (on left side of engine compartment)
• Vent
• Vent mode

6.5L

6.5L VIN F, Compressor Wiring Diagram for GMC Savana Special G3500 1999

List of elements for 6.5L VIN F, Compressor Wiring Diagram for GMC Savana Special G3500 1999:

• A/c
• A/c compress0r high pressure cutout switch (rear of a/c compressor)
• A/c compress0r low pressure cutout switch (in refrigerant line)
• A/c compressor clutch coil
• A/c compressor enable relay (in underhood fuse/relay center)
• A/c fuse 10a
• Bi-lev
• Blnd
• Def
• G103 (oil filler pipe bracket)
• Harness)
• Heat
• Heater and a/c controller
• Hot at all times
• Hot in run
• Hot in run or start
• Htr-a/c fuse 12 20a
• I/p fuse block
• Ign e fuse 10a
• Max
• Off
• Pnk
• Powertrain control module (behind center of dash)
• S215 (i/p harn, 4 cm from radio breakout)
• Underhood fuse/relay center
• Vent

6.5L VIN F, Heater Wiring Diagram for GMC Savana Special G3500 1999

List of elements for 6.5L VIN F, Heater Wiring Diagram for GMC Savana Special G3500 1999:

• (i/p harness, 4 cm from radio breakout)
• (left rear of cabin, behind rear wheelwell)
• (rear a/c harness, 13 cm from blower motor resistor breakout)
• (rear a/c harness, 7 cm from blower motor resistor breakout)
• (rear a/c harness,7 cm from blower motor resistor breakout)
• (school bus)
• Auxiliary blower motor (left rear of cabin, behind rear wheelwell)
• Auxiliary blower motor high speed relay
• Auxiliary blower motor low speed relay
• Auxiliary blower motor medium speed relay
• Auxiliary blower motor resistor (left rear of cabin, behind rear wheelwell)
• Auxiliary blower motor switch
• Blend
• Blower fuse 60a
• Blower motor
• Blower motor resistor/relay (right side of front blower motor)
• C1 f
• C2 c
• C202
• Convenience center
• Def
• G103 (right side of engine)
• G201 (behind left kick panel)
• G301 (left rear of vehicle) g400 (left rear of vehicle)
• Heat
• Heater controller
• Hot at all times
• Hot in run
• Hot in run or start
• Htr-a/c fuse 12 20a
• I/p fuse block
• Interior lights system
• Med
• Off
• Red
• Rr blower fuse 30a
• Rr hvac fuse 24 10a
• S202 (dash harn, in vssb breakout)
• S215
• S327 (left rear of vehicle)
• S400 (left body harness, near chmsl)
• S405
• S412
• S413
• Tan
• Temperature valve actuator motor (on hvac plenum)
• Underhood fuse/relay center
• Vent

6.5L VIN F, Manual A/C Wiring Diagram, Cargo Van for GMC Savana Special G3500 1999

List of elements for 6.5L VIN F, Manual A/C Wiring Diagram, Cargo Van for GMC Savana Special G3500 1999:

• (aux hvac harn, 14 cm from aux hvac module breakout)
• (below dash, right side of hvac plenum) temperature valve actuator motor
• (i/p harn, 4 cm from radio breakout)
• (i/p harn, 7 cm from vssb breakout)
• (in engine harness)
• (in underhood fuse/relay center)
• (left body harn, left side of cabin)
• (left front of eng) g103
• (left rear interior)
• (left rear of cabin, behind rear wheelwell)
• (rear a/c harn, 7 cm from blower motor resistor breakout)
• (rear a/c harn, 7 cm from o/s air vlv actuator breakout)
• (rear a/c harness, 13 cm from blower motor resistor/relay breakout)
• (rear aux hvac harn, 29 cm from rear aux hvac module breakout)
• A/c
• A/c compressor clutch coil
• A/c compressor enable relay (in underhood fuse/relay center)
• A/c compressor high pressure cutoff switch (rear of a/c compressor)
• A/c compressor low pressure cutoff switch (in refrigerant line)
• A/c fuse 10a
• Auxiliary blower motor
• Auxiliary blower motor high speed relay
• Auxiliary blower motor low speed relay
• Auxiliary blower motor medium speed relay
• Auxiliary blower motor resistor (left rear of cabin, behind rear wheelwell)
• Bi-lev
• Blend
• Blower fuse 60a
• Blower motor
• Blower motor resistor/relay (right side of front blower motor)
• C2 c
• C202
• C3 d3
• Convenience center
• D3 c3
• Def
• Diode
• Front auxiliary hvac control module
• G103 (left front of engine)
• G201 (left kick panel)
• Heat
• Heater and a/c controller
• Hot at all times
• Hot in run
• Hot in run or start
• Htr-a/c fuse 12 20a
• I/p fuse block
• Ign e fuse 10a
• Interior lights system
• Max
• Med
• Off
• Pnk
• Powertrain control module (behind center of dash)
• Rear auxiliary mode valve and seal assy (left rear interior)
• Rear auxiliary temperature
• Red
• Rr blower fuse 30a
• Rr hvac fuse 24 10a
• S202
• S215
• S307
• S400
• S404
• S405 (rear a/c harn, 7 cm from blower resistor breakout)
• S411
• S412
• S413
• Tan
• Temp
• Under- hood fuse/ relay center
• Valve assy
• Vent
• Vent mode

6.5L VIN F, Manual A/C Wiring Diagram, Passenger Van for GMC Savana Special G3500 1999

List of elements for 6.5L VIN F, Manual A/C Wiring Diagram, Passenger Van for GMC Savana Special G3500 1999:

• (aux hvac harn, 14 cm from aux hvac module breakout)
• (aux hvac harn, 26 cm from aux hvac module breakout)
• (aux hvac harn, 57 cm from aux hvac module breakout)
• (below dash, right side of hvac plenum) temperature valve actuator motor
• (front interior roof panel)
• (i/p harn, 7 cm from vssb breakout)
• (i/p harn, 4 cm from radio breakout) s215
• (in engine harness)
• (in underhood fuse/relay center)
• (left body harn, left side of cabin)
• (left front of eng) g103
• (left rear interior)
• (left rear of cabin, behind rear wheelwell)
• (rear a/c harn, 7 cm from blower motor resistor breakout)
• (rear a/c harn, 7 cm from o/s air vlv actuator breakout)
• (rear a/c harness, 13 cm from blower motor resistor/relay breakout)
• (rear aux hvac harn, 29 cm from rear aux hvac module breakout)
• (rear hvac harn, 13 cm from aux hvac module breakout)
• A/c
• A/c compressor clutch coil
• A/c compressor enable relay (in underhood fuse/relay center)
• A/c compressor high pressure cutoff switch (rear of a/c compressor)
• A/c compressor low pressure cutoff switch (in refrigerant line)
• A/c fuse 10a
• Auxiliary blower motor
• Auxiliary blower motor high speed relay
• Auxiliary blower motor low speed relay
• Auxiliary blower motor medium speed relay
• Auxiliary blower motor resistor (left rear of cabin, behind rear wheelwell)
• Bi-lev
• Blend
• Blower fuse 60a
• Blower motor
• Blower motor resistor/relay (right side of front blower motor)
• C2 c
• C202
• Convenience center
• Def
• Diode
• Front auxiliary hvac control module
• G103 (left front of engine)
• G201 (left kick panel)
• G400 (left rear of vehicle)
• Heat
• Heater and a/c control logic module
• Heater and a/c controller
• Hot at all times
• Hot in run
• Hot in run or start
• Htr-a/c fuse 12 20a
• I/p fuse block
• Ign e fuse 10a
• Interior lights system
• Max
• Med
• Off
• Pnk
• Powertrain control module (behind center of dash)
• Rear auxiliary hvac control module
• Rear auxiliary mode valve and seal assy (left rear interior)
• Rear auxiliary temperature
• Red
• Rr blower fuse 30a
• Rr ctrl
• Rr hvac fuse 24 10a
• S202
• S307
• S318
• S319
• S320
• S321
• S404
• S405 (rear a/c harn, 7 cm from blower resistor breakout)
• S411
• S412
• S413
• Tan
• Temp
• Under- hood fuse/ relay center
• Valve assy
• Vent
• Vent mode

7.4L

7.4L VIN J, Compressor Wiring Diagram for GMC Savana Special G3500 1999

List of elements for 7.4L VIN J, Compressor Wiring Diagram for GMC Savana Special G3500 1999:

• (in eng harness) s101 (7.4l) (in eng harness)
• (in eng harness) s103 (5.0l, 5.7l, 7.4l) (in eng harness)
• A/c
• A/c compress0r high pressure cutoff switch (rear of a/c compressor)
• A/c compress0r low pressure cutoff switch (in refrigerant line)
• A/c compressor clutch coil
• A/c compressor enable relay (in underhood fuse/relay center)
• A/c fuse 10a
• Bi-lev
• Blnd
• Def
• G103 (right side of engine)
• Heat
• Hot at all times
• Hot in run
• Hot in run or start
• Htr-a/c fuse 12 20a
• Hvac control module
• I/p fuse block
• Ign e fuse 10a
• Max
• Off
• Pnk
• S215 (i/p harn, 4 cm from radio breakout)
• Underhood fuse/relay center
• Vehicle control module (left side of engine compartment)
• Vent

7.4L VIN J, Heater Wiring Diagram for GMC Savana Special G3500 1999

List of elements for 7.4L VIN J, Heater Wiring Diagram for GMC Savana Special G3500 1999:

• (i/p harness, 4 cm from radio breakout)
• (left rear of cabin, behind rear wheelwell)
• (rear a/c harness, 13 cm from blower motor resistor breakout)
• (rear a/c harness, 7 cm from blower motor resistor breakout)
• (rear a/c harness,7 cm from blower motor resistor breakout)
• (school bus)
• Auxiliary blower motor (left rear of cabin, behind rear wheelwell)
• Auxiliary blower motor high speed relay
• Auxiliary blower motor low speed relay
• Auxiliary blower motor medium speed relay
• Auxiliary blower motor resistor (left rear of cabin, behind rear wheelwell)
• Auxiliary blower motor switch
• Blend
• Blower fuse 60a
• Blower motor
• Blower motor resistor/relay (right side of front blower motor)
• C1 f
• C2 c
• C202
• Convenience center
• Def
• G103 (right side of engine)
• G201 (behind left kick panel)
• G301 (left rear of vehicle) g400 (left rear of vehicle)
• Heat
• Heater controller
• Hot at all times
• Hot in run
• Hot in run or start
• Htr-a/c fuse 12 20a
• I/p fuse block
• Interior lights system
• Med
• Off
• Red
• Rr blower fuse 30a
• Rr hvac fuse 24 10a
• S202 (dash harn, in vssb breakout)
• S215
• S327 (left rear of vehicle)
• S400 (left body harness, near chmsl)
• S405
• S412
• S413
• Tan
• Temperature valve actuator motor (on hvac plenum)
• Underhood fuse/relay center
• Vent

7.4L VIN J, Manual A/C Wiring Diagram, Cargo Van for GMC Savana Special G3500 1999

List of elements for 7.4L VIN J, Manual A/C Wiring Diagram, Cargo Van for GMC Savana Special G3500 1999:

• (aux hvac harn, 14 cm from aux hvac module breakout)
• (below dash, right side of hvac plenum) temperature valve actuator motor
• (i/p harn, 4 cm from radio breakout)
• (i/p harn, 7 cm from vssb breakout)
• (in engine harness)
• (in underhood fuse/relay center)
• (left body harn, left side of cabin)
• (left rear interior)
• (left rear of cabin, behind rear wheelwell)
• (left rear of vehicle)
• (rear a/c harn, 7 cm from blower motor resistor breakout)
• (rear a/c harn, 7 cm from o/s air vlv actuator breakout)
• (rear a/c harness, 13 cm from blower motor resistor/relay breakout)
• (rear aux hvac harn, 29 cm from rear aux hvac module breakout)
• A/c
• A/c compressor clutch coil
• A/c compressor enable relay (in underhood fuse/relay center)
• A/c compressor high pressure cutoff switch (rear of a/c compressor)
• A/c compressor low pressure cutoff switch (in refrigerant line)
• A/c fuse 10a
• Auxiliary blower motor
• Auxiliary blower motor high speed relay
• Auxiliary blower motor low speed relay
• Auxiliary blower motor medium speed relay
• Auxiliary blower motor resistor (left rear of cabin, behind rear wheelwell)
• Bi-lev
• Blend
• Blower fuse 60a
• Blower motor
• Blower motor resistor/relay (right side of front blower motor)
• C2 c
• C202
• C3 d3
• Convenience center
• D3 c3
• Def
• Diode
• Front auxiliary hvac control module (on front of overhead console)
• G103 (right side of engine)
• G201 (left kick panel)
• G400
• Heat
• Heater and a/c controller
• Hot at all times
• Hot in run
• Hot in run or start
• Htr-a/c fuse 12 20a
• I/p fuse block
• Ign e fuse 10a
• Interior lights system
• Max
• Med
• Off
• Pnk
• Rear auxiliary mode valve and seal assy (left rear interior)
• Rear auxiliary temperature
• Red
• Rr blower fuse 30a
• Rr hvac fuse 24 10a
• S202
• S215
• S307
• S318
• S404
• S405 (rear a/c harn, 7 cm from blower resistor breakout)
• S411
• S412
• S413
• Tan
• Temp
• Under- hood fuse/ relay center
• Valve assy
• Vehicle control module (left side of engine compartment)
• Vent
• Vent mode

7.4L VIN J, Manual A/C Wiring Diagram, Passenger Van for GMC Savana Special G3500 1999

List of elements for 7.4L VIN J, Manual A/C Wiring Diagram, Passenger Van for GMC Savana Special G3500 1999:

• (aux hvac harn, 14 cm from aux hvac module breakout)
• (aux hvac harn, 26 cm from aux hvac module breakout)
• (aux hvac harn, 57 cm from aux hvac module breakout)
• (below dash, right side of hvac plenum) temperature valve actuator motor
• (front interior roof panel)
• (i/p harn, 7 cm from vssb breakout)
• (i/p harn, 4 cm from radio breakout) s215
• (in engine harness)
• (in underhood fuse/relay center)
• (left body harn, left side of cabin)
• (left rear interior)
• (left rear of cabin, behind rear wheelwell)
• (rear a/c harn, 7 cm from blower motor resistor breakout)
• (rear a/c harn, 7 cm from o/s air vlv actuator breakout)
• (rear a/c harness, 13 cm from blower motor resistor/relay breakout)
• (rear aux hvac harn, 29 cm from rear aux hvac module breakout)
• (rear hvac harn, 13 cm from aux hvac module breakout)
• A/c
• A/c compressor clutch coil
• A/c compressor enable relay (in underhood fuse/relay center)
• A/c compressor high pressure cutoff switch (rear of a/c compressor)
• A/c compressor low pressure cutoff switch (in refrigerant line)
• A/c fuse 10a
• Auxiliary blower motor
• Auxiliary blower motor high speed relay
• Auxiliary blower motor low speed relay
• Auxiliary blower motor medium speed relay
• Auxiliary blower motor resistor (left rear of cabin, behind rear wheelwell)
• Bi-lev
• Blend
• Blower fuse 60a
• Blower motor
• Blower motor resistor/relay (right side of front blower motor)
• C2 c
• C202
• Convenience center
• Def
• Diode
• Front auxiliary hvac control module
• G103 (right side of engine)
• G201 (left kick panel)
• G400 (left rear of vehicle)
• Heat
• Heater and a/c control logic module
• Heater and a/c controller
• Hot at all times
• Hot in run
• Hot in run or start
• Htr-a/c fuse 12 20a
• I/p fuse block
• Ign e fuse 10a
• Interior lights system
• Max
• Med
• Off
• Pnk
• Rear auxiliary hvac control module
• Rear auxiliary mode valve and seal assy (left rear interior)
• Rear auxiliary temperature
• Red
• Rr blower fuse 30a
• Rr ctrl
• Rr hvac fuse 24 10a
• S202
• S307
• S318
• S319
• S320
• S321
• S404
• S405 (rear a/c harn, 7 cm from blower resistor breakout)
• S411
• S412
• S413
• Tan
• Temp
• Under- hood fuse/ relay center
• Valve assy
• Vehicle control module (on left side of engine compartment)
• Vent
• Vent mode