Section 11 (Vacuum Diagrams): Introduction: Notes
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1994 GMC Yukon, 1994 GMC Suburban, 1994 GMC Pickup, 1994 GMC Cab & Chassis, and 1994 GMC C3500 HD. 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.