Not sure which 1999 GMC Sierra Folding Tonneau Covers are right for you? We have over 6556 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:
"i think the tri fold is the greatest of all types of tonneau covers and I am extremely happy with the way it looks on my Sierra." —Justin L from Slatington, PA bought a Lund Genesis Tri-Fold Tonneau Cover for a 1999 GMC Sierra.