Fifth Wheel Trailer Hitch Rail Adapter - ISR Series; For OE Chevy/GMC - PR4452

Fifth Wheel Trailer Hitch Rail Adapter - ISR Series; For OE Chevy/GMC - PR4452

*Scratch & Dent - Item has cosmetic imperfections that do not affect functionality.

This 20,000 OE Series industry standard rail adapter for 2020 Chevy trucks with pucks, converts any PullRite ISR Series hitch, or any other brand industry standard type hitch with tabbed/ spade feet into an OE Puck mounted one. Centered over the axle for a better towing and handling, this OE Series adapter breaks down into 4 individual pieces, uses 4 independent mounting posts and requires no tools to install or remove.

Features & Benefits

  • Fully Removable For A Clean Bed
  • No Tools Required
  • Adapter Converts Your Industry Standard Hitch To An OE Puck Mounted One
  • Fits Any PullRite ISR Series Industry Standard Hitch
  • Mounts Hitch Centered-On-Axle
  • Easier Than Other Brands To Install Or Remove


  • Hitch Compatibility: Adapts OE Fifth Wheel Package Rails To Pullrite Industry Standard Hitches
  • Weight Carrying Capacity: 20000 Pound
  • Estimated Install Time (Hours): 1


Chevrolet / GMC 2020 - Current


OE Series Puck Mounting System — "How it Works"

OE Series Puck Mounting PostThe main feature of an OE Puck mounting system are the mounting posts that install into the truck bed hard points (pucks).

Other brands have their mounting posts in fixed positions on the hitch base. That makes it challenging when you go to install it in the puck mounts for several reasons.  To install the hitch, it must be perfectly square to make all four posts drop in at once and seat properly.  If it doesn’t, you may make repeated attempts at aligning the hitch over holes you can’t clearly see.  And removal of the hitch from all four points simultaneously, requires lifting straight up and level from the center of the hitch.  These two maneuvers can create a lot of undo stress and back strain.

We solved all those issues in our PullRite OE Puck Series hitches with our completely removable, custom designed OE Mounting Posts. 

OE Series Puck Brass WasherFirst, we provide 4 brass washers (right) that convert the standard, rectangular puck point into a nice round hole that are engineered to our Mounting Posts with tight tolerances for the best fit possible…that greatly reduces the amount of chucking during towing. 

By providing you with brass/copper alloy washers, we eliminate corrosion of metals, whereas other manufacturers use steel.  Steel contacting steel, especially when exposed to the elements is going to rust and eventually bind the hitch in the puck holes if left installed too long.

And our brass washers are installed individually by simply dropping them in the puck hole...just like our handles.  With these pieces being modular, you’re not going to get them binding in place.  Other similar OE puck hitches have their washers not only made out of steel, but also fixed/welded onto the bottom side of their base, not allowing for manufacturer’s variances.  Binding is a frequent issue according to the feedback we get, but with our adjustable, modular design, we have yet to receive a complaint.

Because our Mounting Posts aren’t fixed and work independently of one another, you can easily maneuver the hitch over the puck mounts.  Simply install one handle at a time at opposite corners to square it up.  The struggle of lifting it up and down over the holes is eliminated.

OE Puck Series base feet

With trucks being mass produced and not built consistently every single time, you may find your truck frame has some width variances.  To accommodate these inconsistencies, we have designed all our OE Pucks Series hitches with additional space on the passenger side base feet (left), solving fitment issues some other brands experience.

PullRite Castle Nut vs. Other BrandAnother feature that sets our OE Mounting Posts apart from other brands is the use of premium hardware like the castle nut (right).  This specialized nut allows for finer adjustments of the handle into the locked position. 

When you turn the handle into the locked position, you want a tight fit to help eliminate chucking due to additional space between the Mounting Post Cross Pin and the puck mount.  For a snug fit, you simply rotate the castle nut to draw the Cross Pin up and eliminate any “play” in the mounting point.

By using a castle nut with 6 crenel locations, with every 60º turn, you are able to choose which location helps you achieve a tighter fit.  Some other brands have only one through-hole, and in most cases will either be over or under tightened because you can only choose a pin location every 180º.  Check out this video to see a quick demonstration of how castle nut adjustments are made.