AIR CONDITIONING — Chevrolet Silverado 3500 HD 2007 — SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 3) for Chevrolet Silverado 3500 HD 2007

List of elements for Automatic A/C Wiring Diagram (1 of 3) for Chevrolet Silverado 3500 HD 2007:

• (left side of headliner) front inside air temperature sensor
• (lower left side of dash) left i/p junction block
• (lower right side of hvac module) blower motor control module
• 5v ref
• A/c ind
• A/c low pressure switch (on right side of a/c accumulator)
• A/c on
• Air temp
• Air tmp
• Amb air tmp
• Ambient air temperature sensor (on radiator support)
• Ambient light/ sunload sensor assembly (on top center of dash)
• Auto
• B(+)
• Blower motor
• Blwr spd
• Colnt lvl
• Computer data lines system
• Defogger system
• Dfrst val
• Diesel
• Engine coolant level switch (on bottom of surge tank)
• Fan dn
• Fan up
• Fresh air
• Frnt dfg
• Frt def
• Fsh air
• G103 (on front of right cylinder head) (w/o 1500) g106 (lower left side of engine) (w/ 1500)
• G200 (on right front corner of hvac module)
• G201 (upper left corner of dash)
• Gmlan l
• Ground
• Hvac control module
• Ign 3
• J106
• J203
• J206
• J328
• L air tmp
• Left temp control
• Lf sunld
• Logic
• Low ref
• Lw prss
• Mode ctrl
• Mode dn
• Mode up
• Off
• Power distribution system
• R air tmp
• Rear defog
• Rear dfg
• Recir
• Recir ctrl
• Recirc
• Recirc pos
• Red
• Rer def
• Rf sunld
• Right temp control
• Tan
• Upper left air temperature sensor
• Upper right air temperature sensor

Automatic A/C Wiring Diagram (2 of 3) for Chevrolet Silverado 3500 HD 2007

List of elements for Automatic A/C Wiring Diagram (2 of 3) for Chevrolet Silverado 3500 HD 2007:

• (gas) (diesel)
• A/c cmprsr fuse 18 10a
• A/c comp- ressor clutch relay
• A/c compressor clutch
• A4 x5
• Body control module (bcm) (lower left side of dash)
• E x4
• Engine control module (ecm)
• G102 (on lower left front of engine) (w/o 1500) g107 (lower left side of engine) (w/ 1500)
• Hot at all times
• Hvac batt fuse 40 10a
• Hvac blwr fuse 72 40a
• Hvac ign fuse 57 fuse 55 10a
• Pnk
• Red
• Right i/p junction block (in right end of dash)
• Run/ crank relay
• Tan
• Under- hood fuse block (left side of engine compt)
• W/ 1500
• W/ diesel
• W/o 1500

Automatic A/C Wiring Diagram (3 of 3) for Chevrolet Silverado 3500 HD 2007

List of elements for Automatic A/C Wiring Diagram (3 of 3) for Chevrolet Silverado 3500 HD 2007:

• (left side of hvac module) lower left air temperature sensor
• (lower left of hvac module) lower right air temperature sensor
• (near compressor, on a/c high pressure hose) a/c refrigerant pressure sensor
• 87a
• Cool/ fan relay 1
• Cooling fan diode 1
• Cooling fan diode 2
• Fan cntrl relay
• Fan lo relay
• Fan-1 fuse 59 40a
• Fan-2 fuse 62 40a
• G100 (on lower left radiator support)
• Hot at all times
• J100
• Left air temperature actuator (bottom left of hvac module)
• Left cooling fan
• Logic
• Mode actuator (left end of hvac module)
• Pwr/ trn relay
• Recirculation actuator (top right side of hvac module)
• Right air temperature actuator (top middle of hvac module)
• Right cooling fan
• Tan
• Under- hood fuse block (left side of engine compt)

Compressor Wiring Diagram for Chevrolet Silverado 3500 HD 2007

List of elements for Compressor Wiring Diagram for Chevrolet Silverado 3500 HD 2007:

• A/c cmprsr fuse 18 10a
• A/c cmprsr relay
• A/c compressor clutch
• A/c ind
• A/c low pressure switch
• A/c on
• A/c refrigerant pressure sensor
• B(+)
• Computer data lines system
• Engine control module (ecm)
• G102 (on lower left front of engine) (w/o 1500) g107 (lower left side of engine) (w/ 1500)
• G103 (on front of right cylinder head) (w/o 1500) g106 (lower left side of engine) (w/ 1500)
• G200 (on right front corner of hvac module)
• Gmlan l
• Ground
• Hot at all times
• Hvac batt fuse 40 10a
• Hvac control module
• J106
• J203
• Logic
• Lw prss
• Tan
• Under- hood fuse block (left side of engine compt)
• W/ 1500
• W/ diesel
• W/o 1500

Manual A/C Wiring Diagram (1 of 3) for Chevrolet Silverado 3500 HD 2007

List of elements for Manual A/C Wiring Diagram (1 of 3) for Chevrolet Silverado 3500 HD 2007:

• (gas) (diesel)
• (lower right side of hvac module) blower motor control module
• 5v ref
• A/c cmprsr fuse 18 10a
• A/c comp- ressor clutch relay
• A/c ind
• A/c low pressure switch (on right side of a/c accumulator)
• A/c on
• B(+)
• Blower motor
• Blwr spd
• Colnt lvl
• Computer data lines system
• Defogger system
• Dfrst val
• Diesel
• Engine control module (ecm)
• Engine coolant level switch (on bottom of surge tank)
• Fresh air
• Frh air
• G102 (on lower left front of engine) (w/o 1500) g107 (lower left side of engine) (w/ 1500)
• G103 (on front of right cylinder head) (w/o 1500) g106 (lower left side of engine) (w/ 1500)
• G200 (on right front corner of hvac module)
• G201 (upper left corner of dash)
• Gmlan l
• Ground
• Hot at all times
• Hvac batt fuse 40 10a
• Hvac blwr fuse 72 40a
• Hvac control module
• Hvac ign fuse 57 fuse 55 10a
• Ign 3
• Interior light system power distribution system
• J106
• J203
• Led cntl
• Left i/p junction block (lower left side of dash)
• Logic
• Low ref
• Lw prss
• Mode ctrl
• Pnk
• R air tmp
• Rear defog
• Rear dfg
• Recir
• Recir ctrl
• Recirc
• Red
• Rer def
• Run/ crank relay
• Tan
• Under- hood fuse block (left side of engine compt)
• W/ 1500
• W/ diesel
• W/o 1500

Manual A/C Wiring Diagram (2 of 3) for Chevrolet Silverado 3500 HD 2007

List of elements for Manual A/C Wiring Diagram (2 of 3) for Chevrolet Silverado 3500 HD 2007:

• (near compressor, on a/c high pressure hose) a/c refrigerant pressure sensor
• 87a
• A/c compressor clutch
• Body control module (bcm)
• Cool/ fan relay 1
• Cooling fan diode 1
• Cooling fan diode 2
• Fan cntrl relay
• Fan lo relay
• Fan-1 fuse 59 40a
• Fan-2 fuse 62 40a
• G100 (on lower left radiator support)
• Hot at all times
• J100
• Left cooling fan (left front of eng compt)
• Pnk
• Pwr/ trn relay
• Red
• Right cooling fan (right front of eng compt)
• Right i/p junction block (in right end of dash)
• Tan
• Under- hood fuse block (left side of engine compt)

Manual A/C Wiring Diagram (3 of 3) for Chevrolet Silverado 3500 HD 2007

List of elements for Manual A/C Wiring Diagram (3 of 3) for Chevrolet Silverado 3500 HD 2007:

• Logic
• Mode actuator (left end of hvac module)
• Not used
• Recirculation actuator (top right side of hvac module)
• Right air temperature actuator (top middle of hvac module)
• Tan