Base Rails for Reese Custom Outboard Brackets RP56001 on 2015 Chevy Silverado 2500HD

Updated 09/08/2018 | Published 09/07/2018

Question:

2015 GMC 2500 HD. What length of base rail do I need to match up with the Reese 56001 frame brackets that I purchased? Instructions on the frame rails say to mount with the flanges outward on the truck frame. It appears that I will need 50 inch base rail. If the flanges point to the center of the bed the only way to tighten the nuts is by open end wrench making it impossible to torque to specs. I need some help!

asked by: Steve B

Helpful Expert Reply:

The correct base rails for your Reese Quick-Install Custom Outboard Brackets # RP56001 are the Reese Universal Outboard Base Rails # RP30153.

These are 48" base rails so they are close to the 50" length you mentioned and are going to work well for you.

expert reply by: Kyle S