Filling Procedure

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.

Install the SGCM coolant pump outlet hose to the radiator. Refer to Coolant Pipe Quick Connect Fitting - Starter/Generator Control Module .

Fig 1: View Of SGMC Coolant Pump Components

Courtesy of GENERAL MOTORS CORP.

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.

IMPORTANT: Use a 50/50 mixture of DEX-COOL antifreeze and clean, drinkable water.
Fill the SGCM cooling system until the coolant reaches the full cold mark.

Slowly fill the cooling system with a 50/50 coolant mixture. Refer to Capacities - Approximate Fluid in Maintenance and Lubrication.

Fig 2: View Of SGCM Coolant Inlet Hose, Coolant Tank & Inlet Hose Clamp

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Do not exceed the pressure cap rating.

Use the J 24460-01 with the J 46143 in order to apply pressure to the cooling system.
To run the SGCM coolant pump, perform the following steps:
1. Install the scan tool.
2. Turn the ignition ON with the engine OFF.
3. With the scan tool set to Powertrain, Alternative Fuels, Special Functions, SGCM Output Controls, command the SGCM pump speed ON for 1 minute.
4. Turn the ignition OFF.
Remove the cooling system pressure tester and adapter from the SGCM cooling system.
Top off the coolant as necessary.
Repeat step 3 through 7 until the SGCM cooling system is at the full cold mark.
IMPORTANT: Make sure the coolant is flowing.
Inspect the concentration of the SGCM coolant, using the J 26568.
Rinse away any excess coolant from the SGCM and the engine compartment.