AIR CONDITIONING – Chevrolet Silverado 1500 2003 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

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

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

List of elements for Automatic A/C Wiring Diagram (2 of 2) for Chevrolet Silverado 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

Compressor Wiring Diagram for Chevrolet Silverado 1500 2003

List of elements for Compressor Wiring Diagram for Chevrolet Silverado 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 Silverado 1500 2003

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

List of elements for Manual A/C Wiring Diagram (2 of 2) for Chevrolet Silverado 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