Not sure which 1999 GMC Sierra Tonneau Covers are right for you? We have over 18756 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"The cover makes my 14 yr. old truck look new. I love the fact that the support bracing does not move around. Excellent value. Thanks!" —Randolph M from Aurora, CO bought an Extang Classic Platinum Original Snap Style Roll Up Tonneau Cover for a 1999 GMC Sierra, Standard bed (approx. 6' 6").