Spectra GM12A Fuel Tank

Spectra GM12A Fuel Tank for Classic GM A-Body Cars

The Spectra GM12A fuel tank is a direct replacement for select 1973-1977 GM A-body vehicles. It is built to match original equipment fit and function for Buick, Chevrolet, Oldsmobile, and Pontiac applications where the tank mounts without a filler neck.

• OE-style fuel tank replacement for classic GM platforms
• Fits 1973-1977 Buick Century and Regal
• Fits 1973-1977 Chevrolet Malibu and Monte Carlo
• Fits 1973-1977 Oldsmobile Cutlass, plus 1975-1977 Cutlass Salon and 1973-1974 / 1976-1977 Cutlass Supreme
• Fits 1975-1977 Pontiac Grand LeMans and 1973-1977 Pontiac LeMans
• Lock ring kit included
• Application notes: 39-3/4 in. x 26-1/2 in. x 9-1/4 in.; w/o filler neck

Built for fuel storage service, this Spectra Premium tank uses manufacturing controls and engineering standards aimed at matching or exceeding the original tank it replaces. The GM12A part number is used across multiple interchange references, making it a practical choice when replacing a worn, rusted, or leaking tank on a classic Buick Century, Chevrolet Malibu, or Pontiac LeMans.

Common Reasons for Replacement

• Fuel tank corrosion from age and moisture exposure
• Fuel leaks caused by rust, pinholes, or seam deterioration
• Damaged tank from road debris or prior repair issues
• Fuel delivery problems related to a compromised tank interior
• Restoration work on classic GM A-body vehicles

Installation Notes

Verify the tank dimensions and filler-neck configuration before installation. This fuel tank is specified for vehicles without a filler neck, and the lock ring kit is included for the sender opening. Confirm all mounting points, venting, and fuel sender compatibility against the original tank before final assembly.

Quality Assurance

Spectra Premium fuel tanks are manufactured with engineering, production, and quality-control processes intended to meet or exceed original equipment performance. This part cross-references FLGM12A and FT512 for the same application.