AIR CONDITIONING – Chevrolet Avalanche 1500 2003 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 2) for Chevrolet Avalanche 1500 2003

List of elements for Automatic A/C Wiring Diagram (1 of 2) for Chevrolet Avalanche 1500 2003:

• (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 a/c muffler hose assembly)
• 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 fuse 40a
• Blower motor
• Blower motor control processor (behind right side of dash)
• Blower speed ctrl
• 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 (behind right side of dash, near right "a" pillar)
• G203 (behind left side of dash, 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 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 i/p fuse block (lower left side of dash)
• 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 (in lower left floor duct assembly)
• Lower right air temperature sensor (bottom center of hvac box, in floor duct)
• 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)
• S207 (in headliner harness)
• S218 (in i/p harn)
• 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, in upper duct)
• Upper right air temperature sensor (below dash trim panel, in upper duct)

Automatic A/C Wiring Diagram (2 of 2) for Chevrolet Avalanche 1500 2003

List of elements for Automatic A/C Wiring Diagram (2 of 2) for Chevrolet Avalanche 1500 2003:

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

Automatic A/C Wiring Diagram, Rear A/C for Chevrolet Avalanche 1500 2003

List of elements for Automatic A/C Wiring Diagram, Rear A/C for Chevrolet Avalanche 1500 2003:

• (except luxury) (luxury)
• (in i/p harness)
• 5v ref
• A10
• Air temp door ctrl
• Air temp door sig
• Auxiliary air temperature actuator (near top center of rear hvac module assembly)
• Auxiliary blower motor control processor (behind right rear quarterpanel, below aux blower motor)
• Auxiliary hvac control module (mounted to top of aux hvac assemblly)
• Auxiliary mode actuator (behind right rear quarter trim panel, at front of aux hvac module)
• B(+)
• Blower control
• Blower motor
• Blower mt sp ctrl
• Class 2 ser data
• Class 2 serial data
• Computer data lines system
• 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 (behind right side of dash, near right "a" pillar)
• G203 (benind left side of dash, near left "a" pillar)
• G410 (behind right rear quarterpanel)
• Gnd
• Ground
• Hot at all times
• Hot in run
• 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
• Left i/p fuse block (lower left side of dash)
• 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 10a
• Rear seat audio control module
• Rr ecc fuse 10a
• Rr hvac fuse 30a
• S207 (in headliner harness)
• S210
• S330 s333 (in console harness)
• 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 Chevrolet Avalanche 1500 2003

List of elements for Compressor Wiring Diagram for Chevrolet Avalanche 1500 2003:

• (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 a/c muffler hose assembly)
• 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 (1 of 2) for Chevrolet Avalanche 1500 2003

List of elements for Manual A/C Wiring Diagram (1 of 2) for Chevrolet Avalanche 1500 2003:

• (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 a/c muffler hose assembly)
• 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 (behind right side of dash, near right "a" pillar)
• G203 (behind left side of dash, 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 relay block (left side of dash)
• Ign 3
• Ign e fuse 10a
• Inst lamp dim ctrl
• Interior lights system
• Left i/p fuse block (lower left side of dash)
• 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 i/p fuse block (lower right side of dash)
• 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 (2 of 2) for Chevrolet Avalanche 1500 2003

List of elements for Manual A/C Wiring Diagram (2 of 2) for Chevrolet Avalanche 1500 2003:

• (not used)
• Ambient light sens lo ref
• Ambient light sens sig
• Ambient light sensor (top center of dash)
• B12
• Body control module (lower left side of dash, below steering column)
• Class 2 serial data
• G200 (behind right side of dash, near "a" pillar)
• Left air temperature actuator (top center of hvac control assembly)
• Logic
• Mode actuator (left side of hvac module)
• Recirculation actuator (top center of hvac module)
• Right air temperature actuator (top center of hvac control assembly)
• Right i/p fuse block (lower right side of dash)
• Tan

Manual A/C Wiring Diagram, Rear with A/C only for Chevrolet Avalanche 1500 2003

List of elements for Manual A/C Wiring Diagram, Rear with A/C only for Chevrolet Avalanche 1500 2003:

• (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
• G401 (behind right rear quarterpanel)
• High
• Hot at all times
• Hot in run
• Ign 3 fuse 10a
• Interior lights system
• Left i/p fuse block (left side of dash)
• 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 for Chevrolet Avalanche 1500 2003

List of elements for Manual A/C Wiring Diagram, Rear with Heat & A/C for Chevrolet Avalanche 1500 2003:

• (mounted to aux hvac box, below blower motor) auxiliary blower motor resistor assembly
• A10
• Aux air temp ddor ctrl
• Aux front mode 1 sig
• Aux mode door ctrl
• Aux rear air temp 2 sig
• Aux rear mode 2 sig
• Auxiliary blower motor (behind right rear quarterpanel)
• Auxiliary heater blower motor resistor
• Auxiliary high speed blower motor relay
• Auxiliary hvac control processor (mounted on top of aux hvac assembly)
• Auxiliary low speed blower motor relay
• Auxiliary med speed blower motor relay
• Auxiliary mode actuator (behind right rear quarter trim panel, at front of aux hvac module)
• Auxiliary temperature actuator (near top center of rear 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
• Ign 3 fuse 10a
• Ign 3 voltage
• Ign volt
• Interior lights system
• Left i/p fuse block (left side of dash)
• 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 (behind right rear quarterpanel)
• Underhood fuse block (left side of engine compt, near battery)