FixVault

Transfer Case

WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 1989 GMC Vandura Special, 1989 GMC Vandura, 1989 GMC Value Van, 1989 GMC Suburban, and 1989 GMC Safari. However, it is still accessible from the selected car via links, so may be relevant.

Remove filler plug. Check oil level. If level is not up to filler plug opening, add lubricant until it is.