Important: When performing the following procedures, use only hand tools to remove and install the drain and fill plugs.

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Remove the transfer case shield, if equipped. Refer to Transfer Case Shield Replacement .
3. Remove the fill plug.
4. Remove the drain plug.
5. Allow the transfer case fluid to drain completely.

Important: Use only drain and fill plugs that are made from aluminum. Steel or brass plugs are not compatible with the magnesium case.

Notice: Refer to Fastener Notice in the Preface section.




1. Apply sealant, GM P/N 12346004, (Canadian P/N 10953480), or equivalent to the threads on the drain and fill plugs.
2. Install the drain plug.

Tighten
Tighten the plug to 25 N·m (18 lb ft).

3. 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).
4. Install the fill plug.

Tighten
Tighten the plug to 25 N·m (18 lb ft).

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