Checking Fluid Level: Transmission
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.
Check lubricant level at transmission filler plug hole. Lubricant should be level with bottom of hole. Add as needed.