Recommended Folding Hard Cover that Secures Open in the Wind on a 2025 GMC Sierra 2500 w/ 6-3/4' Bed

Updated 11/02/2026 | Published 10/31/2026

Products Featured in This Question

Lomax Stance Hard Tonneau Cover - Folding - Aluminum - Black Urethane

(36)

$1378.80

Question:

when folded against back window, what kind of winds can it withstand. I had a backflip blow off in a strong crosswind while towing my gooseneck.

asked by: Mitch Z

Expert Reply:

Welcome back Mitch. The Lomax Stance Hard Tonneau Cover item # LOM64DR has a completely different retaining system than BakFlip so it can stand up to high winds extremely well. When the cover is folded completely up against the back window, it has magnetic retention straps that firmly grip to mounting points on your truck's roof. These mounting points are securely attached with 3M VHB tape and do not require drilling.

The Lomax Stance Hard Tonneau Cover item # LOM64DR is designed specifically for the 2025 GMC Sierra 2500 with a 6-3/4' bed. It comes with all the clamps needed to install the cover without drilling. This cover has a aluminum panels that have been powder coated black for durability. The low profile cover will sit only a 1/2" above your Sierra's bed rails when installed. It is also compatible with the GM Multi-Pro tailgate.

What kind of gooseneck trailer are you pulling? Feel free to answer this and throw in any other questions you have, where it says Add Comment.

expert reply by: Jerred H

LOM64DR
(click to enlarge)

Mitch Z.

11/2/2026

I pull a 25 foot flatbed and a horse trailer.

Jerred H.

11/2/2026

@MitchZ Thanks for that info. The only drawback with your setup is that the Lomax Stance Hard Tonneau Cover item # LOM64DR is going to completely cover your 3rd brake light camera when you fold it all the way up. You won't be able to see your gooseneck ball when you're backing up to your trailer.