HomeAir and Fuel Delivery > Fuel StorageSpectra GM21B Fuel Tank
Part #: GM21B

Spectra GM21B Fuel Tank

⚙️ 17 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Buick and Cadillac, Eldorado, Riviera, and Seville
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Reliable Fuel Tank Replacement for Buick and Cadillac Models

The Spectra GM21B fuel tank is designed specifically for select Buick and Cadillac vehicles, including the Eldorado, Riviera, and Seville. This fuel storage component ensures proper fuel containment and delivery, maintaining the performance and safety of your vehicle's fuel system.

  • Compatible with Buick Eldorado, Cadillac Riviera, and Cadillac Seville models
  • Durable construction for long-lasting fuel storage
  • Meets OEM specifications for fit and function
  • Part number GM21B for precise identification
  • Designed to integrate seamlessly with existing fuel delivery systems

Product Details and Specifications

The Spectra GM21B fuel tank is engineered to provide a direct replacement for the original fuel tank in Buick Eldorado, Cadillac Riviera, and Cadillac Seville vehicles. Manufactured to meet or exceed OEM standards, this fuel tank offers reliable fuel storage and helps maintain the integrity of the fuel system. Its design ensures proper fitment and compatibility, reducing the risk of leaks or fuel delivery issues. The GM21B part number allows for easy identification and ordering, ensuring you receive the correct component for your vehicle.

Common Applications and Problem Resolution

  • Replacement for damaged or leaking fuel tanks in Buick Eldorado, Cadillac Riviera, and Seville
  • Solves fuel contamination issues caused by rust or corrosion inside the tank
  • Addresses fuel delivery interruptions due to compromised fuel storage
  • Restores proper fuel system pressure and flow
  • Prevents fuel odors and potential safety hazards from tank deterioration

Installation Notes and Tips

When installing the Spectra GM21B fuel tank, ensure the vehicle is safely supported and the fuel system is depressurized. Verify compatibility with your specific Buick Eldorado, Cadillac Riviera, or Seville model year before installation. Inspect all fuel lines and connections for wear or damage and replace as necessary to maintain system integrity. Properly torque mounting hardware to manufacturer specifications to avoid leaks or movement.

Quality Assurance and Warranty Information

Spectra fuel tanks are manufactured under strict quality control standards to meet OEM requirements. The GM21B part number is backed by Spectra's commitment to durability and performance. Please consult the product packaging or manufacturer documentation for specific warranty details related to this fuel tank.

This part fits 17 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
1985BuickRiviera3.8LV6GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck
1985CadillacEldorado4.1LV8GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck
1985CadillacSeville4.1LV8GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck
1984BuickRiviera3.8LV6GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck
1984CadillacEldorado4.1LV8GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck
1984CadillacSeville4.1LV8GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck
1983CadillacEldorado4.1LV8GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck
1983CadillacSeville4.1LV8GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck
1982CadillacEldorado4.1LV8GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck
1982CadillacSeville4.1LV8GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck
1981CadillacEldorado6.0LV8GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck
1981CadillacSeville6.0LV8GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck
1980CadillacEldorado6.0LV8GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck
1980CadillacEldorado5.7LV8GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck
1980CadillacSeville6.0LV8GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck
1980CadillacSeville5.7LV8GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck
1979CadillacEldorado5.7LV8GASN/A40-3/8 in. x 39 in. x 9-1/4 in.; Lock Ring Kit Included; w/o Filler Neck

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

22510737FT550TNKGM21B

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.