Flushing - Starter/Generator Control Module
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.
IMPORTANT:
- Do not use a chemical flush.
- Store used coolant in the proper manner, such as in a used engine coolant holding tank. Do not pour used coolant down a drain. Ethylene glycol antifreeze is a very toxic chemical. Do not dispose of coolant into the sewer system or ground water. This is illegal and ecologically unsound.
- Various methods and equipment can be used to flush the cooling system. If special equipment is used (such as a back flusher) follow the manufacturer's instructions.
- Block the drive wheels.
- Place the transmission in park (P) or neutral (N).
- Engage the park brake.
- To run the SGCM coolant pump, perform the following steps:
- Install the scan tool.
- Turn the ignition ON with the engine OFF.
- With the scan tool set to Powertrain, Alternative Fuels, Special Functions, SGCM Output Controls, command the SGCM pump speed ON for 1 minute.
- Turn the ignition OFF.
- Follow the drain and fill procedure using only clean drinkable water. Repeat the procedure if necessary, until the fluid is nearly colorless. Refer to Draining and Filling Cooling System - Starter/Generator Control Module .
- Fill the cooling system. Refer to Draining and Filling Cooling System - Starter/Generator Control Module .
NOTE:
The procedure below must be followed. Improper coolant level could result in a low or high coolant level condition, causing starter/generator control module damage.