GM Service Manual Online
For 1990-2009 cars only

Transfer Case

If your vehicle is equipped with All-Wheel Drive, be sure to perform the lubricant checks described in this section. There are two additional systems that need lubrication.

When to Check Lubricant

Refer to the Maintenance Schedule to determine how often to check the lubricant. See Scheduled Maintenance .

How to Check Lubricant

(A) Drain Plug (B) Filler Plug


Object Number: 874310  Size: B3

To get an accurate reading, the vehicle should be on a level surface.

If the level is below the bottom of the filler plug hole, located on the transfer case, you'll need to add some lubricant. Add enough lubricant to raise the level to the bottom of the filler plug hole. Use care not to overtighten the plug.

What to Use

Refer to the Maintenance Schedule to determine what kind of lubricant to use. See Recommended Fluids and Lubricants .