Section 22 (Vacuum Diagrams): Introduction: Notes
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1994 GMC Vandura Special, 1994 GMC Vandura, 1994 GMC Rally Camper Special, 1994 GMC Rally, and 1994 GMC Forward Control. However, it is still accessible from the selected car via links, so may be relevant.
This article contains underhood views or schematics of vacuum hose routing. Use these vacuum diagrams during the visual inspection in appropriate BASIC TESTING article in the ENGINE PERFORMANCE section below. This will assist in identifying improperly routed vacuum hoses, which can cause driveability and/or computer-indicated malfunction.