GMC Sierra For sale: Genuine GM bed liner (fiber) for GMC Sierra / Silverado - Short Bed. For sale: Original factory bed liner (fiber) for GMC Sierra and Chevrolet Silverado vehicles. Manufacturer Part Number: GM# 84648943 Compatible Models: From model year 2019 to 2024 and above (new body style). Bed Type: Designed for Short Bed, which usually comes with the Crew Cab model. New, unused. Price: Best offer.