What Lomax Hard Tonneau Cover Fits 2021 GMC Sierra 1500 With 5 Foot 8 Inch Bed

Updated 12/22/2025 | Published 10/06/2024

Question:

What years are compatible with my 21 gmc sierra 1500 5 foot 8 inch bed. And does it matter if there is a multipro tailgate or not in those years

asked by: Nick J

Expert Reply:

Hi Nick,

I'm not sure what you mean by what years, but I can tell you there are a couple of fits for your 2021 GMC Sierra 1500 with a 5 foot 8 inch bed for the Lomax hard tonneau cover, and it does not matter if you have the MultiPro tailgate or not. What DOES matter is if you have the CarbonPro box or not, so here are the options for both:

- WITHOUT CarbonPro Box: Lomax Hard Tonneau Cover # A45FR

- WITH CarbonPro Box: Lomax Hard Tonneau Cover # A65FR

expert reply by: Kyle S

Jameson C.

12/22/2025

Hey Nick, how did the Lomax hard tonneau cover work out on your Sierra with the 5-foot 8-inch bed? Did the fit match up well with your truck’s setup? Your update could make it easier for others with the same model to choose the right cover.