Cooling System Connector End Views

WARNING: This page is about a different car, the 2005 GMC Sierra and 2005 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Auxiliary Water Pump (HP2)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12084126 2-Way F Sealed (BK)
Pin	Wire Color	Circuit No.	Function
1	BK	550	Ground
2	TN/WH	5543	Auxiliary Heater Pump Voltage

Coolant Level Switch (8.1L)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12052644 2-Way F Metri-Pack 150 Series Sealed (GY)
Pin	Wire Color	Circuit No.	Function
A	L-GN	1478	Coolant Level Switch Signal
B	BK	550	Ground

Coolant Level Switch (Diesel)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15324243 2-Way F Metri-Pack 150 Series Sealed (GY)
Pin	Wire Color	Circuit No.	Function
A	L-GN	1478	Coolant Level Switch Signal
B	BK	550	Ground

Cooling Fan - Left (10 Series)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15454358 2-Way F 630 GT (BK)
Pin	Wire Color	Circuit No.	Function
A	YE	5358	Cooling Fan Motor Control
B	GY	532	Cooling Fan Motor Supply Voltage

Cooling Fan - Right (10 Series)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15454358 2-Way F 630 GT (BK)
Pin	Wire Color	Circuit No.	Function
A	BK	250	Ground
B	L-BU	409	Cooling Fan Motor Supply Voltage

Starter/Generator Control Module Coolant Pump (HP2)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12131678 2-Way F Sealed (BK)
Pin	Wire Color	Circuit No.	Function
1	BK	150	Ground
2	L-BU	703	Ignition 1 Voltage