Engine Cooling Wiring Schematics

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Coolant Level Indicator Control Wiring Schematic - Diesel & L18 Only

Courtesy of GENERAL MOTORS CORP.

Fig 2: Auxiliary Heater Pump (HP2) Wiring Schematic

Courtesy of GENERAL MOTORS CORP.

Fig 3: Starter/Generator Control Module Cooling Wiring Schematic - HP2 - 1 Of 2

Courtesy of GENERAL MOTORS CORP.

Fig 4: Starter/Generator Control Module Cooling Wiring Schematic - HP2 - 2 Of 2

Courtesy of GENERAL MOTORS CORP.