Electrical Diagrams

HVAC Schematics

Primary Blower and Air Delivery Controls (C42) and Vacuum Pump (Diesel)





Master Electrical Component List
Air Delivery Description and Operation
Control Module References
Compressor Controls (C60)
HVAC1 and HVAC2 Fuses
AUX PWR OUTLET, BCM-1, BCM-2, BCM-3, BCM-4, BCM-5, BCM-6, BCM-7, FOH MDL, FRT BLWR, LTR/DLC, and TRLR WRG Fuses
G300, G301, G304, and G305
G102, G110 and G120

Compressor Controls (C60)





Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Rear HVAC (C69) with Rear Auxiliary Controls - Front Controls
Primary Blower and Air Delivery Controls (C42) and Vacuum Pump (Diesel)
Electrical Center Identification Views
HVAC1 and HVAC2 Fuses
A/C CMPRSR, ABS MDL, ABS MTR, DIESEL FUEL PUMP, GAS FUEL PUMP, HORN, and WASH Fuses
G102, G110 and G120
G300, G301, G304, and G305

Rear HVAC (C69) with Rear Auxiliary Controls- Front Controls





Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Rear HVAC (C69) with Rear Auxiliary Controls - Rear Controls
Compressor Controls (C60)
HVAC1 and HVAC2 Fuses
Rear HVAC (C69) with Rear Auxiliary Controls - Air Delievery Controls
Rear HVAC (C69) with Rear Auxiliary Controls - Rear Controls
I/P Bulb Dimming (2 of 2)
G348 (1 of 2)

Rear HVAC (C69) with Rear Auxiliary Controls- Rear Controls





Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Rear HVAC (C69) with Rear Auxiliary Controls - Air Delievery Controls
Rear HVAC (C69) with Rear Auxiliary Controls - Front Controls
I/P Bulb Dimming (2 of 2)
G401 (Passenger or Cargo)
G348 (1 of 2)

Rear HVAC (C69) with Rear Auxiliary Controls- Air Delivery Controls





Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Rear HVAC (C69) without Rear Auxiliary Controls - Front Controls
Rear HVAC (C69) with Rear Auxiliary Controls - Rear Controls
RUN/CRNK Relay
HVAC CNTRL, I/P CLUSTER, ONSTAR, OSRVM SW, RDO/CHIME, REAR BLWR, and RFA/TPM Fuses and PWR SEATS Circuit Breaker
HVAC1 and HVAC2 Fuses
Rear HVAC (C69) with Rear Auxiliary Controls - Front Controls
G402 (Passenger or Cargo)

Rear HVAC (C69) without Rear Auxiliary Controls- Front Controls





Master Electrical Component List
Air Delivery Description and Operation
Control Module References
Rear HVAC (C69) without Rear Auxiliary Controls - Air Delievery Controls
Rear HVAC (C69) with Rear Auxiliary Controls - Air Delievery Controls
HVAC1 and HVAC2 Fuses
I/P Bulb Dimming (2 of 2)
G348 (1 of 2)

Rear HVAC (C69) without Rear Auxiliary Controls- Air Delivery Controls





Master Electrical Component List
Air Delivery Description and Operation
Control Module References
Rear HVAC (C36 without C69)
Rear HVAC (C69) without Rear Auxiliary Controls - Front Controls
HVAC CNTRL, I/P CLUSTER, ONSTAR, OSRVM SW, RDO/CHIME, REAR BLWR, and RFA/TPM Fuses and PWR SEATS Circuit Breaker
HVAC1 and HVAC2 Fuses
G402 (Passenger or Cargo)

Rear HVAC (C36 without C69)





Master Electrical Component List
Air Delivery Description and Operation
Control Module References
Coolant Heater (K08)
Rear HVAC (C69) without Rear Auxiliary Controls - Air Delievery Controls
HVAC CNTRL, I/P CLUSTER, ONSTAR, OSRVM SW, RDO/CHIME, REAR BLWR, and RFA/TPM Fuses and PWR SEATS Circuit Breaker
HVAC1 and HVAC2 Fuses
I/P Bulb Dimming (1 of 2)
G402 (Passenger or Cargo)
G347

Coolant Heater (K08)





Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Rear HVAC (C36 without C69)
AUX PWR OUTLET, BCM-1, BCM-2, BCM-3, BCM-4, BCM-5, BCM-6, BCM-7, FOH MDL, FRT BLWR, LTR/DLC, and TRLR WRG Fuses
Communications Enable
G350 and G400
High Speed GMLAN (Diesel)