For 1990-2009 cars

### Removal Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove the drain plug (2).
3. Remove the fill plug (1).

### Installation Procedure

1. Clean the drain plug.

Notice: Refer to Component Fastener Tightening Notice in the Preface section.

2. Install the drain plug (2).

Tighten
Tighten the drain plug to 39 N·m (29 lb ft).

3. Fill the transfer case with synthetic gear lubricant GM P/N 89021677 (Canadian P/N 89021678) to the bottom of the fill plug, or 0.80 L (0.85 qt).
4. Install the fill plug (1).

Tighten
Tighten the fill plug to 39 N·m (29 lb ft).

5. Lower the vehicle.