GM Full-Size Trucks 1970-1979 Vacuum Diagrams Repair Guide
Access our free Vacuum Diagrams Repair Guide for GM Full-Size Trucks 1970-1979 through AutoZone Rewards. These diagrams include:
- Fig. 1: Vacuum hose schematic – 1977 250 engine, light duty emissions
- Fig. 2: Vacuum hose schematic – 1977 250 and 292 engines, heavy duty emissions (except California)
- Fig. 3: Vacuum hose schematic – 1977 292 engine, heavy duty (California)
- Fig. 4: Vacuum hose schematic – 1977 305 engine, light duty low altitude emissions
- Fig. 5: Vacuum hose schematic – 1977 305 engine, heavy duty emissions
- Fig. 6: Vacuum hose schematic – 1977 350 engine, light duty high altitude and California emissions
Access our GM Full-Size Trucks 1970-1979 Vacuum Diagrams Repair Guide by creating an account or signing into your AutoZone Rewards account. Once you sign in, follow these instructions to access our Repair Guides.
- Add your vehicle in Manage My Vehicles.
- Enter your vehicle details.
- Click the “View More” button, and then click “Vehicle Repair Guides.”
- Select the chapter “Vacuum Diagrams Repair Guide”.
