WeatherTech Automotive Accessories and AutoAnything sell replacement liners for GMC truck flatbeds, as do JC Whitney and Pickup Specialties. Popular brands available from these sources include BedRug, DualLiner and HercuLiner.
The DualLiner is one of the most popular GMC flatbed liner options. This liner has hard sidewalls and a slip-resistant rubber bottom. It also features UV protection, which prevents fading and cracking from prolonged exposure to sunlight. The DualLiner comes with a lifetime manufacturer's warranty.
The BedRug BedTred and BedTred Pro are also popular GMC flatbed liners. The BedTred Pro is a composite liner with foam floor padding and a textured surface that discourages cargo slippage. Installation does not require drilling or adhesives. Rinsing the BedTred Pro with water removes dust and dirt. This liner comes with a limited lifetime warranty.
The WeatherTech TechLiner protects truck beds from cargo such as construction materials, heavy furniture and landscaping equipment. This flexible, temperature-resistant liner installs either over a bare bed or an existing liner. Installation and removal are quick and simple, and each liner comes with the required mounting hardware.
Al's Liner is a unique bed liner system for all trucks, including GMC models. This spray-on liquid liner comes in three colors and several texture options. Custom tinting is also available.