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 24 (Servicing - M/T) >> Lubrication >> Service Intervals >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Service Intervals: Notes

WARNING: This page does not describe the selected car, but rather 19 other vehicles, including the 1991 Oldsmobile Bravada, 1991 GMC Vandura, 1991 GMC Value Van, 1991 GMC Sonoma, and 1991 GMC S15 Jimmy. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: There are 2 light duty truck emission control classifications: Light Duty (up to 8600 lbs. Gross Vehicle Weight) and Heavy Duty (vehicles more than 8600 lbs. GVW).
scientia non olet · About LEMON Manuals