GM Buick, Oldsmobile, Pontiac, Full-Size 1975-1990 Firing Orders Repair Guide
Access our free Firing Orders Repair Guide for GM Buick, Oldsmobile, Pontiac, Full-Size 1975-1990 through AutoZone Rewards. These diagrams include:
- Fig. 1: Buick-built 231, 252 V6 Engine firing order: 1-6-5-4-3-2 Distributor rotation: Clockwise
- Fig. 2: Olds-built 260, 307, 350, 400, 403, 455 Pontiac-built 265, 301, 350, 400, 455 V8 Engine Firing Order: 1-8-4-3-6-5-7-2 Distributor rotation: Counter-clockwise
- Fig. 3: Buick-built 350 V8 Firing order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise
- Fig. 4: Chevrolet-built 267, 305, 350 Firing Order: 1-8-4-3-6-5-7-2 Distributor rotation: clockwise
- Fig. 5: Chevrolet-built 262 Firing order: 1-6-5-4-3-2 Distributor rotation: clockwise

Access our GM Buick, Oldsmobile, Pontiac, Full-Size 1975-1990 Firing Orders 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 ” Firing Orders Repair Guide”.