COOLING FAN
4.3L VIN X
4.3L VIN X, Cooling Fan Wiring Diagram for GMC Sierra 2500 HD 2012
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List of elements for 4.3L VIN X, Cooling Fan Wiring Diagram for GMC Sierra 2500 HD 2012:
- (near compressor, on a/c high pressure hose) a/c refrigerant pressure sensor
- 4.3l
- 4.8l, 5.3l & 6.2l
- 5v ref
- 87a
- Computer data lines system
- Cooling fan diode 1
- Cooling fan diode 2
- Data bus (+)
- Data bus (-)
- Ect sens sig
- Engine control module (ecm) (left front of engine compt, near fan shroud)
- Engine coolant temperature (ect) sensor (4.3l: left side of engine) (except 4.3l: on top of engine)
- Fan cntrl relay
- Fan hi relay
- Fan lo relay
- Fan rly ctrl
- Fan-1 fuse 60 40a
- Fan-2 fuse 62 40a
- G100 (on lower left radiator support)
- G101 (on lower right radiator support)
- Hot at all times
- J100
- J101
- Left cooling fan (left front of engine compt)
- Low ref
- Pwr/ trn relay
- Pwrtrn rly ctrl
- Right cooling fan (right front of engine compt)
- Sens sig
- Tan
- Under- hood fuse block (left side of engine compt)
4.8L VIN A
4.8L VIN A, Cooling Fan Wiring Diagram for GMC Sierra 2500 HD 2012
List of elements for 4.8L VIN A, Cooling Fan Wiring Diagram for GMC Sierra 2500 HD 2012:
- (near compressor, on a/c high pressure hose) a/c refrigerant pressure sensor
- 4.3l
- 4.8l, 5.3l & 6.2l
- 5v ref
- 87a
- Computer data lines system
- Cooling fan diode 1
- Cooling fan diode 2
- Data bus (+)
- Data bus (-)
- Ect sens sig
- Engine control module (ecm) (left front of engine compt, near fan shroud)
- Engine coolant temperature (ect) sensor (4.3l: left side of engine) (except 4.3l: on top of engine)
- Fan cntrl relay
- Fan hi relay
- Fan lo relay
- Fan rly ctrl
- Fan-1 fuse 60 40a
- Fan-2 fuse 62 40a
- G100 (on lower left radiator support)
- G101 (on lower right radiator support)
- Hot at all times
- J100
- J101
- Left cooling fan (left front of engine compt)
- Low ref
- Pwr/ trn relay
- Pwrtrn rly ctrl
- Right cooling fan (right front of engine compt)
- Sens sig
- Tan
- Under- hood fuse block (left side of engine compt)
5.3L VIN 0
5.3L VIN 0, Cooling Fan Wiring Diagram for GMC Sierra 2500 HD 2012
List of elements for 5.3L VIN 0, Cooling Fan Wiring Diagram for GMC Sierra 2500 HD 2012:
- (near compressor, on a/c high pressure hose) a/c refrigerant pressure sensor
- 4.3l
- 4.8l, 5.3l & 6.2l
- 5v ref
- 87a
- Computer data lines system
- Cooling fan diode 1
- Cooling fan diode 2
- Data bus (+)
- Data bus (-)
- Ect sens sig
- Engine control module (ecm) (left front of engine compt, near fan shroud)
- Engine coolant temperature (ect) sensor (4.3l: left side of engine) (except 4.3l: on top of engine)
- Fan cntrl relay
- Fan hi relay
- Fan lo relay
- Fan rly ctrl
- Fan-1 fuse 60 40a
- Fan-2 fuse 62 40a
- G100 (on lower left radiator support)
- G101 (on lower right radiator support)
- Hot at all times
- J100
- J101
- Left cooling fan (left front of engine compt)
- Low ref
- Pwr/ trn relay
- Pwrtrn rly ctrl
- Right cooling fan (right front of engine compt)
- Sens sig
- Tan
- Under- hood fuse block (left side of engine compt)
5.3L VIN 7
5.3L VIN 7, Cooling Fan Wiring Diagram for GMC Sierra 2500 HD 2012
List of elements for 5.3L VIN 7, Cooling Fan Wiring Diagram for GMC Sierra 2500 HD 2012:
- (near compressor, on a/c high pressure hose) a/c refrigerant pressure sensor
- 4.3l
- 4.8l, 5.3l & 6.2l
- 5v ref
- 87a
- Computer data lines system
- Cooling fan diode 1
- Cooling fan diode 2
- Data bus (+)
- Data bus (-)
- Ect sens sig
- Engine control module (ecm) (left front of engine compt, near fan shroud)
- Engine coolant temperature (ect) sensor (4.3l: left side of engine) (except 4.3l: on top of engine)
- Fan cntrl relay
- Fan hi relay
- Fan lo relay
- Fan rly ctrl
- Fan-1 fuse 60 40a
- Fan-2 fuse 62 40a
- G100 (on lower left radiator support)
- G101 (on lower right radiator support)
- Hot at all times
- J100
- J101
- Left cooling fan (left front of engine compt)
- Low ref
- Pwr/ trn relay
- Pwrtrn rly ctrl
- Right cooling fan (right front of engine compt)
- Sens sig
- Tan
- Under- hood fuse block (left side of engine compt)
6.0L VIN J
6.0L VIN J, Cooling Fan Wiring Diagram for GMC Sierra 2500 HD 2012
List of elements for 6.0L VIN J, Cooling Fan Wiring Diagram for GMC Sierra 2500 HD 2012:
- 87a
- Auxiliary fuse block (left side of engine compt)
- Computer data lines system
- Data bus +
- Data bus -
- 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)
- 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)
- G101 (on lower right radiator support)
- Gmlan l
- Hi spd fan rly
- Hot at all times
- Hot w/ pwr/trn relay energized
- Hvac control module
- J100
- J101
- J117
- J118
- Left cooling fan (left front of engine compt)
- Left engine cooling fan resistor
- Logic
- Low ref
- Low spd fan rly
- Med spd fan rly
- Pnk
- Power distribution system
- Right cooling fan (right front of engine compt)
- Right engine cooling fan resistor
- Tan
- Underhood fuse block (left side of engine compt)
6.0L VIN J, Hybrid Cooling Fan Wiring Diagram for GMC Sierra 2500 HD 2012
List of elements for 6.0L VIN J, Hybrid Cooling Fan Wiring Diagram for GMC Sierra 2500 HD 2012:
- 5v ref
- Air inlet drive motor battery temperature sensor
- Air outlet drive motor battery temperature sensor
- Auxiliary fuse block (left side of engine compt)
- Becm fan fuse 2 15a
- Computer data lines system
- Cool pump fuse 6 15a
- Cool pump relay
- Data bus +
- Data bus -
- Drive motor battery temperature sensor 1
- Drive motor battery temperature sensor 2
- Drive motor battery temperature sensor 3
- Drive motor battery temperature sensor 4
- Drive motor generator battery (under second row seats)
- Drive motor generator battery control module
- Engine control module (ecm) (left front of engine compt)
- G100 (on lower left radiator support)
- G101 (on lower right radiator support)
- G311
- Generator battery vent fan
- Generator battery vent fan relay
- Generator control module temperature sensor
- Gnd
- Hot at all times
- In temp sens rtn
- In temp sens sig
- J100
- J101
- J119
- J395
- Left generator control module coolant pump
- Low ref
- Low temp cooling pump mtr gnd
- Not used
- Out temp sens rtn
- Out temp sens sig
- Red
- Right generator control module coolant pump
- Rly ctrl
- Tan
- Temp sens rtn 1
- Temp sens rtn 2
- Temp sens rtn 3
- Temp sens rtn 4
- Temp sens sig 1
- Temp sens sig 2
- Temp sens sig 3
- Temp sens sig 4
- X120
- X150
- X215
- X350
6.2L VIN 2
6.2L VIN 2, Cooling Fan Wiring Diagram for GMC Sierra 2500 HD 2012
List of elements for 6.2L VIN 2, Cooling Fan Wiring Diagram for GMC Sierra 2500 HD 2012:
- (near compressor, on a/c high pressure hose) a/c refrigerant pressure sensor
- 4.3l
- 4.8l, 5.3l & 6.2l
- 5v ref
- 87a
- Computer data lines system
- Cooling fan diode 1
- Cooling fan diode 2
- Data bus (+)
- Data bus (-)
- Ect sens sig
- Engine control module (ecm) (left front of engine compt, near fan shroud)
- Engine coolant temperature (ect) sensor (4.3l: left side of engine) (except 4.3l: on top of engine)
- Fan cntrl relay
- Fan hi relay
- Fan lo relay
- Fan rly ctrl
- Fan-1 fuse 60 40a
- Fan-2 fuse 62 40a
- G100 (on lower left radiator support)
- G101 (on lower right radiator support)
- Hot at all times
- J100
- J101
- Left cooling fan (left front of engine compt)
- Low ref
- Pwr/ trn relay
- Pwrtrn rly ctrl
- Right cooling fan (right front of engine compt)
- Sens sig
- Tan
- Under- hood fuse block (left side of engine compt)
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