AIR CONDITIONING – GMC Yukon 2005 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram, Front A/C (1 of 2) for GMC Yukon 2005

List of elements for Automatic A/C Wiring Diagram, Front A/C (1 of 2) for GMC Yukon 2005:

• (diesel)
• (gasoline)
• 5v ref
• A/c comp cl rly ctrl
• A/c comp fuse 10a
• A/c compressor clutch
• A/c compressor clutch relay
• A/c low pressure switch (right side of accumulator)
• A/c on
• A/c recirc
• A/c ref pre sens sig
• A/c refrigerant pressure sensor (in high side pressure line)
• A10
• A11
• A12
• A5 c1
• Amb air temp sig
• Ambient air temperature sensor (in right front bumper filler assembly
• Auto
• B c5
• B(+)
• B10
• B11
• B12
• Blower motor (right side of dash)
• Blower motor control processor (behind right side of dash)
• Blower speed ctrl
• Blwr fuse 40a
• C4 e
• C5 c1
• Class 2 ser data
• Class 2 serial data
• Fan dn
• Fan up
• Frt def
• G104 (on left rear of engine block)
• G200 (near right "a" pillar)
• G203 (near left "a" pillar)
• Ground
• Hot at all times
• Hot in run
• Hot in run or start
• Hvac 1 fuse 10a
• Hvac control module (behind center of dash)
• Hvac/ ecas fuse 10a
• I/p fuse block (lower left side of dash)
• I/p junction block (lower right side of dash)
• I/p relay block (left side of dash)
• Ign 3
• Ign e fuse 10a
• Inside air temp sig
• Inside air temperature sensor assembly (in headliner above driver)
• Inst lamp dim ctrl
• Interior lights system
• Left temp control
• Lo lt air temp sig
• Lo press sens sig
• Lo rt air temp sig
• Logic
• Low ref
• Lower left air temperature sensor (left end of hvac module)
• Lower right air temperature sensor (bottom of hvac module)
• Lt temp door ctrl
• Mode
• Mode door ctrl
• Off
• Powertrain control module or engine control module (left front of engine compt)
• Recir
• Recir door ctrl
• Recirc door po sig
• Red
• Right i/p fuse block (lower right side of dash)
• Right temp control
• Rt temp door ctrl
• S102 (in engine harness)
• S218 (in i/p harn)
• S345
• Sp205 (in i/p harn)
• Speed ctrl
• Tan
• Temp sen ass ctrl
• Underhood fuse block (left side of engine compt, near battery)
• Up lt air temp sig
• Up rt air temp sig
• Upper left air temperature sensor (below dash trim panel)
• Upper right air temperature sensor (below dash trim panel)

Automatic A/C Wiring Diagram, Front A/C (2 of 2) for GMC Yukon 2005

List of elements for Automatic A/C Wiring Diagram, Front A/C (2 of 2) for GMC Yukon 2005:

• Ambient light sens lo ref
• Ambient light sens sig
• Ambient light sensor
• Ambient light/sunload sensor assembly (top center of dash)
• B12
• Body control module (lower left side of dash, below steering column)
• Class 2 serial data
• I/p junction block (lower right side of dash)
• Left air temperature actuator (bottom of hvac module)
• Left solar sensor
• Left sunload sensor sig
• Logic
• Mode actuator (left side of hvac module)
• Recirculation actuator (upper right of hvac module)
• Right air temperature actuator (top of hvac module)
• Right solar sensor
• Right sunload sensor sig
• Tan

Automatic A/C Wiring Diagram, Rear A/C with Long Wheel Base for GMC Yukon 2005

List of elements for Automatic A/C Wiring Diagram, Rear A/C with Long Wheel Base for GMC Yukon 2005:

• (except luxury) (luxury)
• (in i/p harness)
• (near right "a" pillar)
• 5v ref
• A10
• Air temp door ctrl
• Air temp door sig
• Auxiliary air temperature actuator (on auxiliary hvac module assembly)
• Auxiliary blower motor (right rear of pass compt)
• Auxiliary blower motor control processor (below auxiliary blower motor)
• Auxiliary hvac control module (right rear of vehicle)
• Auxiliary mode actuator (on auxiliary hvac module assembly)
• B(+)
• Blower control
• Blower mt sp ctrl
• Class 2 ser data
• Class 2 serial data
• Computer data lines system
• Ecc fuse 10a
• Except luxury
• Front auxiliary hvac control assembly
• Ft air temp sw sig
• Ft blow mt sw ctrl
• Ft blower mt sw sig
• Ft mode sw sig
• G200
• G203 (near left "a" pillar)
• G410 (behind right rear quarterpanel)
• Gnd
• Ground
• Hot at all times
• Hot in run
• I/p fuse block (lower left side of dash)
• I/p relay block (lower left side of dash)
• Ign 3 fuse 10a
• In air temp sen sig
• Inside air temp ctrl
• Inside auxiliary air temperature sensor assembly (in headliner, near left "c" pillar)
• Interior lights system
• Lo air temp sen sig
• Logic
• Low ref
• Lower auxiliary air temperature sensor (behind right "c" pillar, front of hvac)
• Luxury
• Mode door sig
• Panel lp dim ctrl
• Power distribution system
• Radio fuse 15a
• Rear seat audio (rsa) controller
• Rr hvac fuse 30a
• S210
• S330 s333 (in console harness)
• S345
• Speed ctrl
• Tan
• Temp control
• Underhood fuse block (left side of engine compt, near battery)
• Up air temp sen sig
• Upper auxiliary air temperature sensor (in rear auxiliary hvac upper duct, near "c" pillar)

Automatic A/C Wiring Diagram, Rear A/C with Short Wheel Base for GMC Yukon 2005

List of elements for Automatic A/C Wiring Diagram, Rear A/C with Short Wheel Base for GMC Yukon 2005:

• (except luxury) (luxury)
• (in i/p harness)
• (near right "a" pillar)
• 5v ref
• A10
• Air temp door ctrl
• Air temp door sig
• Auxiliary air temperature actuator (on auxiliary hvac module assembly)
• Auxiliary blower motor (right rear of pass compt)
• Auxiliary blower motor control processor (below auxiliary blower motor)
• Auxiliary hvac control module (right rear of vehicle)
• Auxiliary mode actuator (on auxiliary hvac module assembly)
• B(+)
• Blower control
• Blower mt sp ctrl
• Class 2 ser data
• Class 2 serial data
• Computer data lines system
• Ecc fuse 10a
• Except luxury
• Front auxiliary hvac control assembly
• Ft air temp sw sig
• Ft blow mt sw ctrl
• Ft blower mt sw sig
• Ft mode sw sig
• G200
• G203 (near left "a" pillar)
• G410 (behind right rear quarterpanel)
• Gnd
• Ground
• Hot at all times
• Hot in run
• I/p fuse block (lower left side of dash)
• I/p relay block (lower left side of dash)
• Ign 3 fuse 10a
• In air temp sen sig
• Inside air temp ctrl
• Inside auxiliary air temperature sensor assembly (in headliner, near left "c" pillar)
• Interior lights system
• Lo air temp sen sig
• Logic
• Low ref
• Lower auxiliary air temperature sensor (behind right "c" pillar, front of hvac)
• Luxury
• Mode door sig
• Panel lp dim ctrl
• Power distribution system
• Radio fuse 15a
• Rear seat audio (rsa) controller
• Rr hvac fuse 30a
• S210
• S330 s333 (in console harness)
• S345
• S440
• S441
• Speed ctrl
• Tan
• Temp control
• Underhood fuse block (left side of engine compt, near battery)
• Up air temp sen sig
• Upper auxiliary air temperature sensor (in rear auxiliary hvac upper duct, near "c" pillar)

Compressor Wiring Diagram for GMC Yukon 2005

List of elements for Compressor Wiring Diagram for GMC Yukon 2005:

• (diesel)
• (gasoline)
• 5v ref
• A/c comp cl rly ctrl
• A/c comp fuse 10a
• A/c compressor clutch
• A/c compressor clutch relay
• A/c low pressure switch (right side of accumulator)
• A/c on switch
• A/c ref pre sens sig
• A/c refrigerant pressure sensor (in high side pressure line)
• A12
• B11
• Class 2 ser data
• Class 2 serial data
• G104 (on left rear of engine compt)
• Hot at all times
• Hot in run or start
• Hvac control module (behind center of dash)
• Ign e fuse 10a
• Lo press sens sig
• Logic
• Low ref
• Powertrain control module or engine control module (left front of engine compt)
• Sp205 (in i/p harn)
• Underhood fuse block (left side of engine compt, near battery)

Manual A/C Wiring Diagram, Front A/C (1 of 2) for GMC Yukon 2005

List of elements for Manual A/C Wiring Diagram, Front A/C (1 of 2) for GMC Yukon 2005:

• (diesel)
• (gasoline)
• 5v ref
• 87a
• A/c comp cl rly ctrl
• A/c comp fuse 10a
• A/c compressor clutch
• A/c compressor clutch relay
• A/c low pressure switch (right side of accumulator)
• A/c on switch
• A/c recirc
• A/c ref pre sens sig
• A/c refrigerant pressure sensor (in high side pressure line)
• A10
• A11
• A12
• A5 c1
• B c5
• B(+)
• B10
• B11
• B12
• Blower fuse 40a
• Blower motor (under right side of dash)
• Blower motor control switch
• Blower motor relay
• Blower motor resistor assembly (on hvac module, near blower motor)
• Class 2 ser data
• Class 2 serial data
• Frt def
• G104 (on left rear of engine block)
• G200 (near right "a" pillar)
• G203 (near left "a" pillar)
• Ground
• Hot at all times
• Hot in run
• Hot in run or start
• Htr a/c fuse 30a
• Hvac 1 fuse 10a
• Hvac control module (behind center of dash)
• Hvac/ ecas fuse 10a
• I/p fuse block (lower left side of dash)
• I/p junction block (lower right side of dash)
• I/p relay block (left side of dash)
• Ign 3
• Ign e fuse 10a
• Inst lamp dim ctrl
• Interior lights system
• Left temp control
• Lo press sens sig
• Logic
• Low ref
• Lt temp door ctrl
• Mode control
• Mode door ctrl
• Off
• Off blow mt ctrl
• Powertrain control module or engine control module (left front of engine compt)
• Recir door ctrl
• Recirc switch
• Red
• Right temp control
• Rt temp door ctrl
• S102 (in engine harness)
• Sp205 (in i/p harn)
• Tan
• Underhood fuse block (left side of engine compt, near battery)

Manual A/C Wiring Diagram, Front A/C (2 of 2) for GMC Yukon 2005

List of elements for Manual A/C Wiring Diagram, Front A/C (2 of 2) for GMC Yukon 2005:

• (not used)
• B12
• Body control module (lower left side of dash, below steering column)
• Class 2 serial data
• G200 (near right "a" pillar)
• I/p junction block (lower right side of dash)
• Left air temperature actuator (bottom of hvac module)
• Logic
• Mode actuator (left side of hvac module)
• Recirculation actuator (upper right of hvac module)
• Right air temperature actuator (top of hvac module)
• Tan

Manual A/C Wiring Diagram, Rear with A/C only with Long Wheel Base for GMC Yukon 2005

List of elements for Manual A/C Wiring Diagram, Rear with A/C only with Long Wheel Base for GMC Yukon 2005:

• (mounted to aux hvac box, below blower motor) auxiliary blower motor resistor assembly
• A10
• Auxiliary blower motor (behind right rear quarterpanel)
• Auxiliary heater blower motor resistor
• Auxiliary high speed blower motor relay
• Auxiliary low speed blower motor relay
• Auxiliary med speed blower motor relay
• Fan com
• Front auxiliary hvac control assembly
• G410 (behind right rear quarterpanel)
• High
• Hot at all times
• Hot in run
• I/p fuse block (left side of dash)
• Ign 3 fuse 10a
• Interior lights system
• Low
• Med
• Off
• Rear auxiliary hvac control assembly
• Rear ctrl
• Red
• Rr hvac fuse 30a
• Underhood fuse block (left side of engine compt, near battery)

Manual A/C Wiring Diagram, Rear with A/C only with Short Wheel Base for GMC Yukon 2005

List of elements for Manual A/C Wiring Diagram, Rear with A/C only with Short Wheel Base for GMC Yukon 2005:

• (mounted to aux hvac box, below blower motor) auxiliary blower motor resistor assembly
• A10
• Auxiliary blower motor (behind right rear quarterpanel)
• Auxiliary heater blower motor resistor
• Auxiliary high speed blower motor relay
• Auxiliary low speed blower motor relay
• Auxiliary med speed blower motor relay
• Fan com
• Front auxiliary hvac control assembly
• G410 (behind right rear quarterpanel)
• High
• Hot at all times
• Hot in run
• I/p fuse block (left side of dash)
• Ign 3 fuse 10a
• Interior lights system
• Low
• Med
• Off
• Rear auxiliary hvac control assembly
• Rear ctrl
• Red
• Rr hvac fuse 30a
• Underhood fuse block (left side of engine compt, near battery)

Manual A/C Wiring Diagram, Rear with Heat & A/C with Long Wheel Base for GMC Yukon 2005

List of elements for Manual A/C Wiring Diagram, Rear with Heat & A/C with Long Wheel Base for GMC Yukon 2005:

• (mounted to aux hvac box, below blower motor) auxiliary blower motor resistor assembly
• A10
• Aux air temp door ctrl
• Aux front mode 1 sig
• Aux mode door ctrl
• Aux rear air temp 2 sig
• Aux rear mode 2 sig
• Auxiliary air temperature actuator (on auxiliary hvac module assembly)
• Auxiliary blower motor (behind right rear quarterpanel)
• Auxiliary heater blower motor resistor
• Auxiliary high speed blower motor relay
• Auxiliary hvac control processor (center of headliner)
• Auxiliary low speed blower motor relay
• Auxiliary med speed blower motor relay
• Auxiliary mode actuator (on auxiliary hvac module assembly)
• Fan com
• Front auxiliary hvac control assembly
• Ft mode sig
• Ft temp sig
• G410
• Ground
• High
• Hot at all times
• Hot in run
• I/p fuse block (left side of dash)
• Ign 3 fuse 10a
• Ign 3 voltage
• Ign volt
• Interior lights system
• Logic
• Low
• Med
• Off
• Rear auxiliary hvac control assembly
• Rear ctrl
• Rear enable ctrl
• Rear mode sig
• Rear temp sig
• Red
• Rr hvac fuse 30a
• Sp410 (right rear pass compt)
• Underhood fuse block (left side of engine compt, near battery)

Manual A/C Wiring Diagram, Rear with Heat & A/C with Short Wheel Base for GMC Yukon 2005

List of elements for Manual A/C Wiring Diagram, Rear with Heat & A/C with Short Wheel Base for GMC Yukon 2005:

• (behind right rear quarterpanel) g410
• (mounted to aux hvac box, below blower motor) auxiliary blower motor resistor assembly
• A10
• Aux air temp door ctrl
• Aux front mode 1 sig
• Aux mode door ctrl
• Aux rear air temp 2 sig
• Aux rear mode 2 sig
• Auxiliary air temperature actuator (on auxiliary hvac module assembly)
• Auxiliary blower motor (behind right rear quarterpanel)
• Auxiliary heater blower motor resistor
• Auxiliary high speed blower motor relay
• Auxiliary hvac control processor (center of headliner)
• Auxiliary low speed blower motor relay
• Auxiliary med speed blower motor relay
• Auxiliary mode actuator (on auxiliary hvac module assembly)
• Fan com
• Front auxiliary hvac control assembly
• Ft mode sig
• Ft temp sig
• Ground
• High
• Hot at all times
• Hot in run
• I/p fuse block (left side of dash)
• Ign 3 fuse 10a
• Ign 3 voltage
• Ign volt
• Interior lights system
• Logic
• Low
• Med
• Off
• Rear auxiliary hvac control assembly
• Rear ctrl
• Rear enable ctrl
• Rear mode sig
• Rear temp sig
• Red
• Rr hvac fuse 30a
• S440
• S441
• Underhood fuse block (left side of engine compt, near battery)