GM Service Manual Online
For 1990-2009 cars only

Transfer Case

When to Check Lubricant

It is not necessary to regularly check transfer case fluid unless you suspect there is a leak or you hear an unusual noise. A fluid loss could indicate a problem. Have it inspected and repaired.

How to Check Lubricant


Object Number: 1454701  Size: B3
  1. Fill Plug

  2. Drain Plug

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

If the level is below the bottom of the fill 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 fill plug hole. Use care not to overtighten the plug.

When to Change Lubricant

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

What to Use

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