AIR CONDITIONING – Chevrolet Tahoe 2008 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram, Except Hybrid (1 of 4) for Chevrolet Tahoe 2008

List of elements for Automatic A/C Wiring Diagram, Except Hybrid (1 of 4) for Chevrolet Tahoe 2008:

• (bottom center of hvac module) blower motor control module
• (in headliner harness, approximately 35 cm from inside air temperature sensor front breakout)
• (right front corner of hvac case) g200
• (under right side of hvac module) blower motor
• 5v ref
• A/c low pressure switch (on a/c high pressure hose)
• A/c on ind
• A/c on switch
• Air temp
• Air tmp
• Amb tmp
• Ambient light/ sunload sensor assembly (top center of dash)
• B(+)
• Blwr spd
• Computer data lines system
• Defogger system
• Dfrst val
• Fresh air ind
• Fresh air request switch
• Front defogger ind
• Front defogger switch
• Front inside air temperature sensor (above left front of headliner)
• G103 (front of right cylinder head)
• G200 (right front corner of hvac case)
• G200 (right front corner of of hvac case)
• G201 (behind upper left end of dash)
• Gmlan l
• Gnd
• Ground
• Hvac ambient air temperature sensor (right front of engine compt)
• Hvac control module
• Ign 3
• J106
• J203
• J206 (in instrument panel harness, approximately 14 cm (5.51 in) from c207 breakout)
• J325
• J328
• L air tmp
• Left i/p junction block (below left end of dash)
• Left temperature control
• Lf sunld
• Logic
• Low ref
• Lower auxiliary air temperature sensor (front of a rear hvac module)
• Lw prss
• Mode cntrl
• Mode ctrl
• Mode down switch
• Mode up switch
• Pnk
• Power distribution system
• R air tmp
• Rear defogger ind
• Rear defogger switch
• Recir ctrl
• Recirc
• Recircu- lation ind
• Recircu- lation switch
• Red
• Rer defg
• Rf sunld
• Right temperature control
• Sens sig
• Sns sig
• Spd ctrl
• Sw sig
• Tan
• Upper auxiliary air temperature sensor
• Upper left air temperature sensor (at center of dash, below dash trim panel)
• Upper right air temperature sensor (at center of dash, below dash trim panel)
• X11

Automatic A/C Wiring Diagram, Except Hybrid (2 of 4) for Chevrolet Tahoe 2008

List of elements for Automatic A/C Wiring Diagram, Except Hybrid (2 of 4) for Chevrolet Tahoe 2008:

• (behind lower left side of dash) body control module (bcm)
• (left side of engine compt) engine control module (ecm)
• (on a/c compressor) a/c compressor clutch
• 4a1
• 4a2
• 4a3
• 4a4
• 4a5
• 4a6
• 4b2
• 4b3
• 4b5
• 4b6
• 5-volt ref
• A/c cmprsr fuse 17 10a
• A/c cmprsr relay
• A4 x5
• Aux hvac-ign fuse 48 10a
• Coil ctrl
• Computer data lines system
• Data bus+
• Data bus-
• E x4
• Engine coolant temperature (ect) sensor (front of left cylinder head) b
• G102 (lower left front of engine)
• Hot at all times
• Hvac batt fuse 39 10a
• Hvac blwr fuse 70 40a
• Hvac-ign fuse 55 10a
• J219 (w/ heated steering wheel)
• Low ref
• Pnk
• Red
• Right i/p junction block (below right end of dash)
• Rly ctrl
• Run/ crank relay
• Sens sig
• Tan
• Under- hood fuse block (left side of engine compt)

Automatic A/C Wiring Diagram, Except Hybrid (3 of 4) for Chevrolet Tahoe 2008

List of elements for Automatic A/C Wiring Diagram, Except Hybrid (3 of 4) for Chevrolet Tahoe 2008:

• (bottom left side of hvac module) lower right air temperature sensor
• (left side of hvac module) lower left air temperature sensor
• (lower right radiator support) g101
• 87a
• A/c refrigerant pressure sensor
• Fan cntrl relay
• Fan hi relay
• Fan lo relay
• Fan-1 fuse 57 40a
• Fan-2 fuse 60 40a
• G100 (lower left radiator support)
• Hot at all times
• Left air temperature actuator (bottom left side of hvac module)
• Left engine cooling fan (behind radiator)
• Mode actuator (on left side of hvac module)
• Pnk
• Pwr/ trn relay
• Recirculation actuator (upper right of hvac module)
• Right air temperature actuator (top of hvac module)
• Right engine cooling fan (behind radiator)
• Tan
• Under- hood fuse block (left side of engine compt)

Automatic A/C Wiring Diagram, Except Hybrid (4 of 4) for Chevrolet Tahoe 2008

List of elements for Automatic A/C Wiring Diagram, Except Hybrid (4 of 4) for Chevrolet Tahoe 2008:

• (above left rear of headlines) auxiliary inside air temperature sensor
• (below rear hvac blower motor) auxiliary blower motor control module
• (or pnk)
• 5v ref
• Auto switch
• Auxiliary air temperature actuator (on rear hvac module assembly)
• Auxiliary blower motor (long wheel base: rear of rear hvac module) (short wheel base: right rear of passenger compt)
• Auxiliary mode actuator (long wheel base: at front of rear hvac module) (short wheel base: on rear hvac module)
• Blower speed control switch
• Computer data lines system
• Fan down switch
• Fan up switch
• G200 (right front corner of hvac case)
• G402 (on right "d" pillar)
• Gmlan
• Gnd
• Hot at all times
• Hvac control module
• I/p fuse block (behind lower left end of dash)
• J328 (in headliner harness, approximately 5 cm from inside air temperature sensor front breakout)
• Logic
• Low ref
• Mde cntrl
• Mode select switch
• Mtr cntrl
• Off switch
• Pnk
• Rear hvac fuse 30a
• Rear seat audio (rsa) controller
• Sns cntrl
• Spd ctrl
• Temp cntrl
• Temperature control switch

Automatic A/C Wiring Diagram, Hybrid (1 of 4) for Chevrolet Tahoe 2008

List of elements for Automatic A/C Wiring Diagram, Hybrid (1 of 4) for Chevrolet Tahoe 2008:

• (bottom center of hvac module) blower motor control module
• (in headliner harness, approximately 35 cm from inside air temperature sensor front breakout)
• (right front corner of hvac case) g200
• (under right side of hvac module) blower motor
• 5v ref
• A/c low pressure switch (on a/c high pressure hose)
• A/c on ind
• A/c on switch
• Air temp
• Air tmp
• Amb tmp
• Ambient light/ sunload sensor assembly (top center of dash)
• B(+)
• Blwr spd
• Computer data lines system
• Defogger system
• Dfrst val
• Fresh air ind
• Fresh air request switch
• Front defogger ind
• Front defogger switch
• Front inside air temperature sensor (above left front of headliner)
• G103 (front of right cylinder head)
• G200 (right front corner of hvac case)
• G200 (right front corner of of hvac case)
• G201 (behind upper left end of dash)
• Gmlan l
• Gnd
• Ground
• Hvac ambient air temperature sensor (right front of engine compt)
• Hvac control module
• Ign 3
• J106
• J203
• J206 (in instrument panel harness, approximately 14 cm (5.51 in) from c207 breakout)
• J325
• J328
• L air tmp
• Left i/p junction block (below left end of dash)
• Left temperature control
• Lf sunld
• Logic
• Low ref
• Lower auxiliary air temperature sensor (front of a rear hvac module)
• Lw prss
• Mode cntrl
• Mode ctrl
• Mode down switch
• Mode up switch
• Pnk
• Power distribution system
• R air tmp
• Rear defogger ind
• Rear defogger switch
• Recir ctrl
• Recirc
• Recircu- lation ind
• Recircu- lation switch
• Red
• Rer defg
• Rf sunld
• Right temperature control
• Rly ctrl
• Sens sig
• Sns sig
• Spd ctrl
• Sw sig
• Tan
• Upper auxiliary air temperature sensor
• Upper left air temperature sensor (at center of dash, below dash trim panel)
• Upper right air temperature sensor (at center of dash, below dash trim panel)
• X11

Automatic A/C Wiring Diagram, Hybrid (2 of 4) for Chevrolet Tahoe 2008

List of elements for Automatic A/C Wiring Diagram, Hybrid (2 of 4) for Chevrolet Tahoe 2008:

• (behind lower left side of dash) body control module (bcm)
• (front of left cylinder head) engine coolant temperature (ect) sensor
• (left side of engine compt) engine control module (ecm)
• (on a/c compressor) heater coolant pump
• 4a1
• 4a2
• 4a3
• 4a4
• 4a5
• 4a6
• 4b2
• 4b3
• 4b5
• 4b6
• 5-volt ref
• A4 x5
• Aux hvac-ign fuse 48 10a
• Auxiliary fuse block
• Cab htr pump fuse 4 10a
• Cab htr pump relay
• Computer data lines system
• Data bus+
• Data bus-
• E x4
• Eng fuse 4 15a
• G102 (lower left front of engine)
• 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
• J219 (w/ heated steering wheel)
• Low ref
• Pnk
• Red
• Right i/p junction block (below right end of dash)
• Rly ctrl
• Run/ crank relay
• Sens sig
• Tan
• Under- hood fuse block (left side of engine compt)

Automatic A/C Wiring Diagram, Hybrid (3 of 4) for Chevrolet Tahoe 2008

List of elements for Automatic A/C Wiring Diagram, Hybrid (3 of 4) for Chevrolet Tahoe 2008:

• (bottom left side of hvac module) lower right air temperature sensor
• (left side of hvac module) lower left air temperature sensor
• (lower right radiator support) g101
• (right rear of engine compt) a/c low pressure sensor
• 87a
• Auxiliary fuse block
• 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 (lower left radiator support)
• Hot at all times
• J162
• J163
• Left air temperature actuator (bottom left side of hvac module)
• Left engine cooling fan (behind radiator)
• Left engine cooling fan resistor
• Mode actuator (on left side of hvac module)
• Pnk
• Recirculation actuator (upper right of hvac module)
• Right air temperature actuator (top of hvac module)
• Right engine cooling fan (behind radiator)
• Right engine cooling fan resistor
• Tan

Automatic A/C Wiring Diagram, Hybrid (4 of 4) for Chevrolet Tahoe 2008

List of elements for Automatic A/C Wiring Diagram, Hybrid (4 of 4) for Chevrolet Tahoe 2008:

• (above left rear of headlines) auxiliary inside air temperature sensor
• (below rear hvac blower motor) auxiliary blower motor control module
• (or pnk)
• 300v+
• 300v-
• 5v ref
• A/c compressor
• Accm fuse 3 15a
• Approximately 5 cm from inside air temperature sensor-front breakout)
• Auto switch
• Auxiliary air temperature actuator (on rear hvac module assembly)
• Auxiliary blower motor (long wheel base: rear of rear hvac module) (short wheel base: right rear of passenger compt)
• Auxiliary fuse block
• Auxiliary mode actuator (long wheel base: at front of rear hvac module) (short wheel base: on rear hvac module)
• Blower speed control switch
• Computer data lines system
• Drive motor generator power inverter module
• Fan down switch
• Fan up switch
• G200 (right front corner of hvac case)
• G402 (on right "d" pillar)
• Gmlan
• Gnd
• Ground
• Hot at all times
• Hvac control module
• I/p fuse block (behind lower left end of dash)
• Left end of dash)
• Left i/p junction block (below x1
• Logic
• Low ref
• Mde cntrl
• Mode select switch
• Mtr cntrl
• Off switch
• Pnk
• Rear hvac fuse 30a
• Rear seat audio (rsa) controller
• Serial data
• Sns cntrl
• Spd ctrl
• Temp cntrl
• Temperature control switch

Compressor Wiring Diagram, Except Hybrid for Chevrolet Tahoe 2008

List of elements for Compressor Wiring Diagram, Except Hybrid for Chevrolet Tahoe 2008:

• (on a/c compressor) a/c compressor clutch
• 5-volt ref
• A/c cmprsr fuse 17 10a
• A/c cmprsr relay
• A/c ind
• A/c low pressure switch (on a/c high pressure hose)
• A/c on
• A/c refrigerant pressure sensor
• B(+)
• Computer data lines system
• Data bus+
• Data bus-
• Engine control module (ecm) (left side of engine compt)
• G102 (lower left front of engine)
• G103 (front of right cylinder head)
• G200 (right front corner of hvac case)
• Gmlan l
• Ground
• Hot at all times
• Hvac batt fuse 39 10a
• Hvac control module
• J105
• J106
• J203
• Logic
• Low ref
• Lw prss
• Sens sig
• Tan
• Under- hood fuse block (left side of engine compt)

Compressor Wiring Diagram, Hybrid for Chevrolet Tahoe 2008

List of elements for Compressor Wiring Diagram, Hybrid for Chevrolet Tahoe 2008:

• (behind upper left end of dash) g201
• (below left end of dash) left i/p junction block
• 300v+
• 300v+ x4
• 300v-
• 300v- x5
• 5-volt ref
• A/c compressor
• A/c low pressure sensor (right rear of engine compt)
• A/c on ind
• A/c on switch
• Accm fuse 3 15a
• Auxiliary fuse block
• B3 x1
• Computer data lines system
• Data bus+
• Data bus-
• Drive motor generator power inverter module
• Engine control module (ecm) (left side of engine compt)
• Gmlan l
• Ground
• Hot at all times
• Hvac control module
• Logic
• Low ref
• Sens sig
• Serial data
• Tan

Manual A/C Wiring Diagram (1 of 4) for Chevrolet Tahoe 2008

List of elements for Manual A/C Wiring Diagram (1 of 4) for Chevrolet Tahoe 2008:

• (below left end of dash) left i/p junction block
• (bottom center of hvac module) blower motor control module
• (right front corner of hvac case) g200
• (under right side of hvac module) blower motor
• 5v ref
• A/c low pressure switch (on a/c high pressure hose)
• A/c on ind
• A/c on switch
• Air tmp
• Auxiliary hvac control module (above middle of headliner)
• B(+)
• Blower control switch
• Blwr spd
• Computer data lines system
• Defogger system
• Dfrst val
• Front defogger ind
• Front defogger switch
• G103 (front of right cylinder head)
• G200 (right front corner of hvac case)
• G201 (behind upper left end of dash)
• Gmlan l
• Gnd
• Ground
• Hvac control module
• Ign 3
• Interior lights system
• Interior lights system power distribution system
• J106
• J203
• J328
• L air tmp
• Led cntrl
• Left temperature control
• Logic
• Low ref
• Lw prss
• Mode ctrl
• Mode select switch
• Mode sig
• Mtr sig
• Pnk
• R air tmp
• Rear defogger ind
• Rear defogger switch
• Recir ctrl
• Recircu- lation ind
• Recircu- lation switch
• Red
• Rer defg
• Right temperature control
• Spd ctrl
• Sw sig
• Tan
• Temp sig
• Temperature control switch
• X11

Manual A/C Wiring Diagram (2 of 4) for Chevrolet Tahoe 2008

List of elements for Manual A/C Wiring Diagram (2 of 4) for Chevrolet Tahoe 2008:

• (behind lower left side of dash) body control module (bcm)
• (left side of engine compt) engine control module (ecm)
• (on a/c compressor) a/c compressor clutch
• 4a1
• 4a4
• 4a6
• 4b2
• 4b3
• 4b5
• 4b6
• 5-volt ref
• A/c cmprsr fuse 17 10a
• A/c cmprsr relay
• Aux hvac-ign fuse 48 10a
• Coil ctrl
• Computer data lines system
• Data bus+
• Data bus-
• E x4
• Engine coolant temperature (ect) sensor (front of left cylinder head) b
• G102 (lower left front of engine)
• Hot at all times
• Hvac batt fuse 39 10a
• Hvac blwr fuse 70 40a
• Hvac-ign fuse 55 10a
• J219 (w/ heated steering wheel)
• Low ref
• Pnk
• Red
• Right i/p junction block (below right end of dash)
• Rly ctrl
• Run/ crank relay
• Sens sig
• Tan
• Under- hood fuse block (left side of engine compt)
• X1 x1

Manual A/C Wiring Diagram (3 of 4) for Chevrolet Tahoe 2008

List of elements for Manual A/C Wiring Diagram (3 of 4) for Chevrolet Tahoe 2008:

• (lower right radiator support) g101
• (not used)
• 87a
• A/c refrigerant pressure sensor
• Fan cntrl relay
• Fan hi relay
• Fan lo relay
• Fan-1 fuse 57 40a
• Fan-2 fuse 60 40a
• G100 (lower left radiator support)
• Hot at all times
• J100 (in forward lamp harness)
• Left air temperature actuator (bottom left side of hvac module)
• Left engine cooling fan (behind radiator)
• Mode actuator (on left side of hvac module)
• Pnk
• Pwr/ trn relay
• Recirculation actuator (upper right of hvac module)
• Right air temperature actuator (top of hvac module)
• Right engine cooling fan (behind radiator)
• Tan
• Under- hood fuse block (left side of engine compt)

Manual A/C Wiring Diagram (4 of 4) for Chevrolet Tahoe 2008

List of elements for Manual A/C Wiring Diagram (4 of 4) for Chevrolet Tahoe 2008:

• (below rear hvac blower motor) auxiliary blower motor control module
• (or pnk)
• 5v ref
• Air request
• Auxiliary air temperature actuator (on rear hvac module assembly)
• Auxiliary blower motor (long wheel base: rear of rear hvac module) (short wheel base: right rear of passenger compt)
• Auxiliary mode actuator (long wheel base: at front of rear hvac module) (short wheel base: on rear hvac module)
• Blower speed
• Computer data lines system
• Down
• G402 (on right "d" pillar)
• Gmlan
• Gnd
• Hot at all times
• Hvac control module
• I/p fuse block (behind lower left end of dash)
• Logic
• Low ref
• Mde cntrl
• Mtr cntrl
• Pnk
• Rear hvac fuse 30a
• Rear seat audio (rsa) controller
• Spd ctrl
• Temp cntrl
• Temperature control