Important: When performing the following service procedures, use only hand tools in order to remove and install the fill or drain plugs. Always start the plugs by hand in order to prevent cross threading.

1. Remove the transfer case shield, if equipped. Refer to Transfer Case Shield Replacement .
2. Remove the fill plug.



3. Remove the drain plug.

Notice: Refer to Fastener Notice in the Preface section.





Important: If the drain or fill plug have to be replaced, use only aluminum replacement drain plugs. Steel plugs will react with the magnesium of the transfer case.

1. Install the drain plug.

Tighten
Tighten the plug to 20 N·m (15 lb ft).

2. Fill the transfer case to the bottom of the fill plug hole with manual transmission and transfer case fluid GM P/N 88861800 (Canadian P/N 88861801).



3. Install the fill plug.

Tighten
Tighten the plug to 20 N·m (15 lb ft).

4. Install the transfer case shield, if equipped. Refer to Transfer Case Shield Replacement .