Replacement Rails and Hardware Kit for BAKFlip MX4 Tonneau for 2015 GMC Sierra 1500 5.5 ft Bed

Updated 07/01/2021 | Published 06/29/2021

Question:

I need some replacement rails for a backflip mx4 hard tonneau cover. It’s for a 2015 GMC Sierra crew cab. I measured the top of the bed and it was 5’9”. I’m not sure what size I need. I also need the hardest kit to install it. If you have it could you tell me what the parts numbers are so I can order it from you. I appreciate it.

asked by: Joe C

Expert Reply:

Since the BakFlip MX4 you'd have on your 2015 GMC Sierra 1500 5-1/2 foot bed is the part # BAK48120 the correct replacement rail kit you'd need is the part # BAKRAILS-48120 and you'd be set.

Then the correct hardware kit you'd need is the part # BAKBK-306KIT.

expert reply by: Jameson C