Rust Buster Over-Axle Frame Repair Kit (Right / Passenger Side) - RB7321R

The Rust Buster RB7321R Over-Axle Frame Repair Kit is a passenger-side replacement frame rail section designed for 1999–2006 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks. Made from heavy-duty 7-gauge steel, this 22.25-inch panel reinforces the frame between the fuel tank crossmember and rear shock crossmember. It ships coated in protective oil to prevent oxidation during transit and requires welding during installation.

Product Features

• Fits 1999–2006 Chevrolet Silverado 1500

• Fits 1999–2006 GMC Sierra 1500

• Fits all cab & bed configurations

• Passenger-side (right) over-axle frame repair section

  • For driver side, see RB7321L

• Caps the frame rail between the fuel tank crossmember and rear shock crossmember

• Measures 22.25" in length

• Constructed from heavy-duty 7-gauge steel

• Ships with protective oil coating to prevent oxidation

• Welding required

• Recommended to protect with Rust Buster Rust Converter Paint RB9917

• Lifetime Warranty

Product Details

• Brand: Rust Buster

• Part Number: RB7321R

• Product Type: Over-Axle Frame Repair Section (Passenger/Right Side)

• Material: 7-gauge steel

• Length: 22.25"

• Installation: Welding required

• Coating: Oil-based protective coating

Fitment

• 1999–2006 Chevrolet Silverado 1500

• 1999–2006 GMC Sierra 1500

• Fits all cab and bed configurations

Additional Information

GM 1500 trucks from 1999–2006 are known for strength and reliability but often fall victim to frame rust, especially in high-salt regions. The RB7321R replaces the corrosion-prone over-axle section with a precisely engineered, heavy-gauge steel solution. Rust Buster uses advanced scanning and CAD systems to ensure proper fit and OE-level contour accuracy. Backed by a Lifetime Warranty, this repair kit protects your investment and extends the life of your truck.