AIR CONDITIONING – Chevrolet Silverado 3500 HD 2009 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram, Except Hybrid (1 of 3) for Chevrolet Silverado 3500 HD 2009

List of elements for Automatic A/C Wiring Diagram, Except Hybrid (1 of 3) for Chevrolet Silverado 3500 HD 2009:

• (left side of headliner) front inside air temperature sensor
• (lower right side of hvac module) blower motor
• (lower right side of hvac module) blower motor control module
• (on right front corner of hvac module) g200
• 5v ref
• A/c ind
• A/c low pressure switch (on right side of a/c accumulator)
• A/c on
• Air temp
• Air tmp
• Air tmp sig
• Amb air tmp
• Ambient air temperature sensor (on left side of radiator support)
• Ambient light/ sunload sensor assembly (top center of dash)
• Auto
• B(+)
• Batt pos volt
• Blwr spd
• Colnt lvl
• Computer data lines system
• Defogger system
• Dfrst val
• Engine coolant level switch (6.6l) (on bottom of surge tank)
• Fan dn
• Fan up
• Fresh air
• Frnt dfg
• Frt def
• Fsh air
• G103 (except 4.3l) (on front of right cylinder head)
• G106 (4.3l) (right rear of engine)
• 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 (in i/p harness, near x200 breakout)
• J328
• L air tmp
• Left i/p junction block (lower left side of dash) x1
• Left sunload sensor
• Left temp control
• Lf sunld
• Logic
• Low ref
• Lw prss
• Mode ctrl
• Mode dn
• Mode up
• Mtr spd ctrl
• Off
• Power distribution system
• R air tmp
• Rear defog
• Rear dfg
• Recir
• Recir ctrl
• Recirc
• Recirc pos
• Red
• Rer def
• Rf sunld
• Right sunload sensor
• Right temp control
• Tan
• Upper left air temperature sensor (under upper left side of dash)
• Upper right air temperature sensor (under upper right side of dash)

Automatic A/C Wiring Diagram, Except Hybrid (2 of 3) for Chevrolet Silverado 3500 HD 2009

List of elements for Automatic A/C Wiring Diagram, Except Hybrid (2 of 3) for Chevrolet Silverado 3500 HD 2009:

• (left front of engine compt, near fan shroud) engine control module (ecm)
• (lower left side of dash) body control module (bcm)
• (on front of a/c compressor) a/c compressor clutch
• (top left rear of engine) (4.3l) g107
• 4a1
• 4a2
• 4a3
• 4a4
• 4a5
• 4a6
• 4b2
• 4b3
• 4b5
• 4b6
• 6.6l except 6.6l & 4.3l 4.3l
• A/c cmprsr fuse 17 (except 6.6l) fuse 16 (6.6l) 10a
• A/c comp- ressor clutch relay
• A4 x5
• E x4
• Engine coolant temperature (ect) sensor (4.3l: left side of dash) (except 4.3l & 6.6l: on top of engine) (6.6l: top front center of engine)
• Except 6.6l & 6.0l (vin k)
• G102 (except 4.3l & 6.6l) (on lower left front of engine)
• Hot at all times
• Hvac batt fuse 39 10a
• Hvac blwr fuse 70 40a
• Hvac ign fuse 55 (except 6.6l) fuse 52 (6.6l) 10a
• J105
• 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)

Automatic A/C Wiring Diagram, Except Hybrid (3 of 3) for Chevrolet Silverado 3500 HD 2009

List of elements for Automatic A/C Wiring Diagram, Except Hybrid (3 of 3) for Chevrolet Silverado 3500 HD 2009:

• (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
• (on lower right radiator support) g101
• 87a
• Cooling fan diode 1
• Cooling fan diode 2
• Except 6.6l & 6.0l (vin k)
• Fan cntrl relay
• Fan hi relay
• Fan lo relay
• Fan-1 fuse 57 40a
• Fan-2 fuse 60 40a
• G100 (on lower left radiator support)
• Hot at all times
• J100
• J101
• Left air temperature actuator (bottom left of hvac module)
• Left engine cooling fan (left front of engine compt)
• 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 engine cooling fan (right front of engine compt)
• Tan
• Under- hood fuse block (left side of engine compt)

Automatic A/C Wiring Diagram, Hybrid (1 of 3) for Chevrolet Silverado 3500 HD 2009

List of elements for Automatic A/C Wiring Diagram, Hybrid (1 of 3) for Chevrolet Silverado 3500 HD 2009:

• (in i/p harness, 14.5 cm from x200 breakout) j206
• (left side of headliner) front inside air temperature sensor
• (on right front corner of hvac module) g200
• 300v+
• 300v-
• 5 volt ref
• 5v ref
• A/c compressor
• A/c ind
• A/c on
• A/c refrig
• A/c refrigerant pressure sensor (right rear of engine compt)
• Accm fuse 3 15a
• Air tmp
• Air tmp sig
• Amb air tmp
• Ambient air temperature sensor (on left side of radiator support)
• Ambient light/sunload sensor assembly (top center of dash)
• Auto
• Auxiliary fuse block (left side of engine compt)
• B(+)
• Blwr spd
• Cab htr pump fuse 4 10a
• Cab htr pump relay
• Computer data lines system
• Cooling pump rly ctrl
• Defogger system
• Dfrst val
• Drive motor generator power inverter module (right rear of engine compt)
• Fan dn
• Fan up
• Fresh air
• Frnt dfg
• Frt def
• Fsh air
• G102 (on lower left front of engine)
• G201 (upper left corner of dash)
• Gmlan l
• Gmlan serial
• Gnd
• Ground
• Heater coolant pump
• Hot at all times
• Hvac control module
• Ign 3
• J203
• J328
• L air tmp
• Left i/p junction block (lower left side of dash)
• Left sunload sensor
• Left temp control
• Lf sunld
• Logic
• Low ref
• Mode ctrl
• Mode dn
• Mode up
• Off
• Pnk
• Power distribution system
• R air tmp
• Rear defog
• Rear dfg
• Recir
• Recir ctrl
• Recirc
• Recirc pos
• Rer def
• Rf sunld
• Right sunload sensor
• Right temp control
• Sens sig
• Tan
• Upper left air temperature sensor (under upper left side of dash)
• Upper right air temperature sensor (under upper right side of dash)

Automatic A/C Wiring Diagram, Hybrid (2 of 3) for Chevrolet Silverado 3500 HD 2009

List of elements for Automatic A/C Wiring Diagram, Hybrid (2 of 3) for Chevrolet Silverado 3500 HD 2009:

• (lower right side of hvac module) blower motor
• (lower right side of hvac module) blower motor control module
• 4a1
• 4a2
• 4a3
• 4a4
• 4a5
• 4a6
• 4b2
• 4b3
• 4b5
• 4b6
• 5v ref 1
• A/c low pressure sensor
• A4 x5
• Batt pos volt
• Body control module (bcm) (lower left side of dash)
• E x4
• Ect sens sig
• Eng fuse 4 15a
• Engine control module (ecm) (left front of engine compt)
• Engine coolant temperature (ect) sensor (on top of engine)
• G102 (on lower left front of engine)
• G200 (on right front corner of hvac module)
• Ground
• Hi spd fan
• Hot at all times
• Hot w/ pwr/trn relay energized
• Hvac batt fuse 39 10a
• Hvac blwr fuse 70 40a
• Hvac ign fuse 55 10a
• J105
• Low ref
• Low spd fan x3
• Med spd fan
• Mtr spd ctrl
• Pnk
• Power distribution system
• Red
• Right i/p junction block (in right end of dash)
• Rly ctrl
• Run/ crnk relay
• Sens sig
• Tan
• Underhood fuse block (left side of engine compt)

Automatic A/C Wiring Diagram, Hybrid (3 of 3) for Chevrolet Silverado 3500 HD 2009

List of elements for Automatic A/C Wiring Diagram, Hybrid (3 of 3) for Chevrolet Silverado 3500 HD 2009:

• (on lower right radiator support) g101
• 87a
• Auxiliary fuse block (left side of engine compt)
• Fan cntrl relay
• Fan hi relay
• Fan lo relay
• Fan mid 1 relay
• Fan mid 2 relay
• Fan-1 fuse 40a
• Fan-2 fuse 40a
• G100 (on lower left radiator support)
• Hot at all times
• J100
• J101
• J117
• J118
• Left air temperature actuator (bottom left of hvac module)
• Left cooling fan (left front of engine compt)
• Left engine cooling fan resistor
• Logic
• Lower left air temperature sensor (left side of hvac module)
• Lower right air temperature sensor (lower left of hvac module)
• Mode actuator (left end of hvac module)
• Pnk
• Recirculation actuator (top right side of hvac module)
• Right air temperature actuator (top middle of hvac module)
• Right cooling fan (right front of engine compt)
• Right engine cooling fan resistor
• Tan

Compressor Wiring Diagram, Except Hybrid for Chevrolet Silverado 3500 HD 2009

List of elements for Compressor Wiring Diagram, Except Hybrid for Chevrolet Silverado 3500 HD 2009:

• (4.3l: top left rear of engine) (6.6l: on front of right cylinder head) (except 4.3l & 6.6l: on lower left front of engine)
• (on front of a/c compressor) a/c compressor clutch
• 4.3l
• 6.6l
• A/c cmprsr fuse 17 (except 6.6l) fuse 16 (6.6l) 10a
• A/c cmprsr relay
• A/c ind
• A/c low pressure switch (on right side of a/c accumulator)
• A/c on
• A/c refrigerant pressure sensor (near compressor, on a/c high pressure hose)
• Automatic a/c
• B(+)
• Computer data lines system
• Engine control module (ecm) (left front of engine compt, near fan shroud)
• Except 4.3l & 6.6l
• G103 (except 4.3l) (on front of right cylinder head)
• G106 (4.3l) (right rear of engine)
• G107 (4.3l) g103 (6.6l) g102 (except 4.3l & 6.6l)
• G200 (on right front corner of hvac module)
• Gmlan l
• Ground
• Hot at all times
• Hvac batt fuse 39 (except 6.6l) fuse 36 (6.6l) 10a
• Hvac control module
• J105
• J106
• J203
• Logic
• Lw prss
• Manual a/c
• Tan
• Under- hood fuse block (left side of engine compt)

Compressor Wiring Diagram, Hybrid for Chevrolet Silverado 3500 HD 2009

List of elements for Compressor Wiring Diagram, Hybrid for Chevrolet Silverado 3500 HD 2009:

• 300v +
• 300v -
• 5 volt ref
• 5v ref 1
• A/c compressor
• A/c ind
• A/c low pressure sensor
• A/c on
• A/c refrig
• A/c refrigerant pressure sensor (right rear of engine compt)
• Accm fuse 3 15a
• Auxiliary fuse block (left side of engine compt)
• Computer data lines system
• Drive motor generator power inverter module (right rear of engine compt)
• Engine control module (ecm) (left front of engine compt)
• G201 (upper left corner of dash)
• Gmlan l
• Gmlan serial
• Gnd
• Hot at all times
• Hvac control module
• Left i/p junction block (lower left side of dash) x1
• Logic
• Low ref
• Low ref sens sig gmlan - glman + x3
• Tan

Manual A/C Wiring Diagram (1 of 3) for Chevrolet Silverado 3500 HD 2009

List of elements for Manual A/C Wiring Diagram (1 of 3) for Chevrolet Silverado 3500 HD 2009:

• (4.3l) g107
• (4.3l: top left rear of engine) (6.6l: on front of right cylinder head) (except 6.6l & 4.3l: on lower left front of engine)
• (6.6l) g103
• (left front of engine compt, near fan shroud) engine control module (ecm)
• (lower right side of hvac module) blower motor
• (lower right side of hvac module) blower motor control module
• 4.3l
• 5v ref
• 6.6l
• A/c cmprsr fuse 17 (except 6.6l) fuse 18 (6.6l) 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
• Ambient air temperature sensor (odometer security wiring provision) (on radiator support)
• B(+)
• Batt pos volt
• Blower motor control switch
• Blwr spd
• Colnt lvl
• Computer data lines system
• Defogger system
• Dfrst val
• Engine coolant level switch (6.6l) (on bottom of surge tank)
• Engine coolant temperature (ect) sensor (4.3l: left side of engine) (except 4.3l & 6.6l: on top of engine) (6.6l: top front center of engine)
• Except 4.3l & 6.6l
• Except 6.6l 6.0l (vin k)
• Fresh air
• Frh air
• G102 (except 6.6l & 4.3l)
• G103 (except 6.6l) (on front of right cylinder head)
• G106 (4.3l) (right rear of engine)
• G200 (on right front corner of hvac module)
• G201 (upper left corner of dash)
• Gmlan l
• Ground
• Hot at all times
• Hvac batt fuse 39 (except 6.6l) fuse 36 (6.6l) 10a
• Hvac blwr fuse 70 (except 6.6l) fuse 65 (6.6l) 40a
• Hvac control module
• Hvac ign fuse 55 (except 6.6l) fuse 52 (6.6l) 10a
• Ign 3
• Interior lights system power distribution system
• J105
• J106
• J203
• Led cntl
• Left i/p junction block (lower left side of dash)
• Logic
• Low ref
• Lw prss
• Mode ctrl
• Mode switch
• Mtr spd ctrl
• Pnk
• R air tmp
• Rear defog
• Rear dfg
• Recir
• Recir ctrl
• Recirc
• Red
• Rer def
• Run/ crank relay
• Tan
• Temperature control switch
• Under- hood fuse block (left side of engine compt)

Manual A/C Wiring Diagram (2 of 3) for Chevrolet Silverado 3500 HD 2009

List of elements for Manual A/C Wiring Diagram (2 of 3) for Chevrolet Silverado 3500 HD 2009:

• (4.3l) g107
• (4.3l: top left rear of engine) (6.6l: on front of right cylinder head) (except 6.6l & 4.3l: on lower left front of engine)
• (6.6l) g103
• (lower left side of dash) body control module (bcm)
• (near compressor, on a/c high pressure hose) a/c refrigerant pressure sensor
• (on front of a/c compressor) a/c compressor clutch
• 4a1
• 4a4
• 4a6
• 4b3
• 4b5
• 87a
• Cooling fan diode 1
• Cooling fan diode 2
• Except 6.6l & 6.0l (vin k)
• Fan cntrl relay
• Fan lo relay
• Fan-1 fuse 57 40a
• Fan-2 fuse 60 40a
• G100 (on lower left rediator support)
• G101 (on lower right radiator support)
• G102 (except 6.6l & 4.3l)
• Hi fan relay
• Hot at all times
• J100
• J101
• J105
• Left cooling fan (left front of engine compt)
• Pnk
• Pwr/ trn relay
• Red
• Right cooling fan (right front of engine 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 2009

List of elements for Manual A/C Wiring Diagram (3 of 3) for Chevrolet Silverado 3500 HD 2009:

• (not used)
• Air temperature actuator (top middle of hvac module)
• Logic
• Mode actuator (left end of hvac module)
• Recirculation actuator (front a/c) (top right side of hvac module)
• Tan