Filling Procedure

Fig 1: View Of SGMC Coolant Pump Components

Courtesy of GENERAL MOTORS CORP.

Install the SGCM coolant pump outlet hose to the radiator. Refer to Coolant Pipe Quick Connect Fitting - 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.

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

Courtesy of GENERAL MOTORS CORP.

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.

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. See Special Tools .
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.