LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1990 >> Forward Control 3.9 L >> Repair and Diagnosis >> External Pages >> Different car >> Section 17 (Servicing - M/T) >> Lubrication >> Checking Fluid Level
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Checking Fluid Level

WARNING: This page does not describe the selected car, but rather 26 other vehicles, including the 1983 GMC Vandura Special, 1983 GMC Vandura, 1983 GMC Value Van, 1983 GMC Suburban, and 1983 GMC S15 Pickup. However, it is still accessible from the selected car via links, so may be relevant.

Check lubricant level at filler plug hole on side of transmission. Lubricant should be level with bottom of filler plug hole. Add lubricant as necessary to bring to correct level.

NOTE: If vehicle is equipped with a transaxle, check fluid level when transaxle is cold. If hot, fluid may flow from filler hole when plug is removed. This could result in burned hands or incorrect level readings.