Vacuum Diagrams: Introduction

This article contains underhood views of vacuum hose routing diagrams. Vacuum hose routing diagrams are located next to Vehicle Emission Control Information Label located in the engine compartment. Use vacuum hose routing diagrams during visual inspection in BASIC TESTING article in the ENGINE PERFORMANCE Section. This will assist in identifying improperly routed vacuum hoses which may cause driveability and/or computer-indicated malfunctions.

Fig 1: Vacuum Hose Routing Diagram (Standard Federal)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Vacuum Hose Routing Diagram (California & Upgraded Federal)

Courtesy of GENERAL MOTORS CORP.