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3500 HD Model 310713-321112
Rotary gear design: fewer moving parts means less friction and wear on components
GMC Sierra 2500 HD and 3500 HD crew cab (see application info to verify fitment)
brackets includ ed but shipped separately)
The AT78WX
AMP Research BedXtender HD Sport - Silver Model 74831-00A 13 3/4" 3500 HD Model 310713-321112AMP Research BedXtender HD Sport Silver Model 74831 00A V shape design is the perfect mix of form and function that keeps your gear secure. Provides the extra clearance needed when used with some tonneau cover rails. Flip it out with the tailgate open to gain up to 2 feet of enclosed cargo area. Flip it inside and close the tailgate to keep tools and smaller cargo contained in the truck bed. 3 year 36,000 mile warranty Durable silver or black powder
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