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Air Conditioning — Chevrolet Cab & Chassis Silverado 3500 2004 Wiring Diagram

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 2) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for Automatic A/C Wiring Diagram (1 of 2) for Chevrolet Cab & Chassis Silverado 3500 2004:

(6.6l vin 1)
(6.6l vin 2)
(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 fuse 40a
Blower motor (right side of dash)
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 (near right "a" pillar)
G200 (near right side of dash, "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 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 (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 (2 of 2) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for Automatic A/C Wiring Diagram (2 of 2) for Chevrolet Cab & Chassis Silverado 3500 2004:

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
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 i/p fuse block (lower right side of dash)
Right solar sensor
Right sunload sensor sig
Sunload sensor assembly (top center of dash)
Tan

Compressor Wiring Diagram for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for Compressor Wiring Diagram for Chevrolet Cab & Chassis Silverado 3500 2004:

(6.6l vin 1)
(6.6l vin 2)
(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)

Heater Wiring Diagram for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for Heater Wiring Diagram for Chevrolet Cab & Chassis Silverado 3500 2004:

87a
B c5
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)
G200 (near right "a" pillar)
Hot at all times
Hot in run
Htr a/c fuse 30a
Hvac control module (behind center of dash)
Left i/p fuse block (lower left side of dash)
Off
Red
Right i/p fuse block (lower right side of dash)
Tan
Underhood fuse block (left side of engine compt, near battery)

Manual A/C Wiring Diagram (1 of 2) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for Manual A/C Wiring Diagram (1 of 2) for Chevrolet Cab & Chassis Silverado 3500 2004:

(6.6l vin 1)
(6.6l vin 2)
(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 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 Cab & Chassis Silverado 3500 2004

List of elements for Manual A/C Wiring Diagram (2 of 2) for Chevrolet Cab & Chassis Silverado 3500 2004:

(not used)
B12
Body control module (lower left side of dash, below steering column)
Class 2 serial data
G200 (near right "a" pillar)
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)
Right i/p fuse block (lower right side of dash)
Tan

AIR CONDITIONING – Chevrolet Cab & Chassis Silverado 3500 2004 – SYSTEM WIRING DIAGRAMS