Rust Buster Rear Fuel Tank Crossmember for 1999–2006 Chevy Silverado & GMC Sierra 1500/2500 (Non-HD) - RB7322

The Rust Buster RB7322 Rear Fuel Tank Crossmember is engineered as a direct-fit frame replacement component for 1999–2006 Chevrolet Silverado 1500/2500 (Non-HD) and GMC Sierra 1500/2500 (Non-HD) models. Constructed from heavy-duty 11-gauge steel, this 43.50-inch crossmember restores structure and support to a common rust-prone area of the GMT800 platform. Includes a passenger-side shock mount, fuel tank strap mounting bracket, fuel tank support bracket, and pre-welded driver-side mount plate. Outer plates are shipped loose to simplify installation. Ships with a protective oil coating to prevent oxidation during transit. Welding is required.

Product Features

• Fits 1999–2006 Chevrolet Silverado 1500/2500 (Non-HD)

• Fits 1999–2006 GMC Sierra 1500/2500 (Non-HD)

• Fits all cab and bed configurations

• Measures 43.50" in length

• Made from heavy-duty 11-gauge steel

• Includes passenger-side shock mount

• Includes fuel tank strap mounting bracket

• Includes fuel tank support mounting bracket

• Driver-side mount plate pre-welded to tube

• Outer plates shipped loose for easier installation

• Ships with oil protective coating to prevent oxidation

• Welding required

• Recommended to protect with Rust Buster Rust Converter Paint RB9917

• Backed by a Lifetime Warranty

Product Details

• Brand: Rust Buster

• Part Number: RB7322

• Product Type: Rear Fuel Tank Crossmember

• Material: 11-gauge steel

• Length: 43.50"

• Installation: Welding required

• Coating: Oil-based protective coating

• Included Components:

  • Passenger-side shock mount

  • Fuel tank strap mounting bracket

  • Fuel tank support mount bracket

  • Pre-welded driver-side mount plate

  • Loose outer plates for installation

Fitment

• 1999–2006 Chevrolet Silverado 1500 (Non-HD)

• 1999–2006 Chevrolet Silverado 2500 (Non-HD)

• 1999–2006 GMC Sierra 1500 (Non-HD)

• 1999–2006 GMC Sierra 2500 (Non-HD)

• Fits all cab and bed configurations

Additional Information

The 1999–2006 Silverado/Sierra platform is well known for performance, capability, and longevity—but also for frame corrosion, especially around the rear fuel tank crossmember. Rust Buster developed the RB7322 as a precise, heavy-gauge replacement engineered using advanced scanning and CAD modeling to replicate OE frame geometry. This ensures consistent fitment, installation ease, and long-term durability. Backed by a Lifetime Warranty, this crossmember reinforces one of the most critical structural points on the truck and extends the service life of your GMT800 chassis.