Starter Generator Control Module Cooling Fan Always On

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.

Step	Action	Yes	No
Schematic Reference: Engine Cooling Schematics Connector End View Reference: Cooling System Connector End Views DEFINITION: The starter/generator control module (SGCM) coolant fan motor runs continuously.
1	Did you perform the Engine Cooling Diagnostic System Check?	Go to Step 2	Go To Diagnostic System Check - Engine Cooling
2	Turn ON the ignition, with the engine OFF. Is the SGCM coolant fan running all the time?	Go to Step 3	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3	Remove the SGCM coolant fan relay. Did the coolant fan turn OFF?	Go to Step 5	Go to Step 4
4	Repair the short to power in the SGCM coolant fan motor supply voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 7	-
5	Inspect for poor connections at the SGCM coolant fan relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 7	Go to Step 6
6	Replace the SGCM coolant fan relay. Did you complete the repair?	Go to Step 7	-
7	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2