I have the Andersen Ultimate but no experience with the Chevy truck. However, I posted in a different thread
herethe following that might be helpful:
Clearance of your pinbox, frame etc, to bed must be checked by you and this post contains no warranty that these settings or positions will clear all obstructions in your particular installation.
The Andersen Ultimate 5th wheel hitch has 4 combinations of positioning that can adjust fore and aft placement of the pin.
The documentation and specs can be found on the andersen website - pick the spec to match the hitch you're curious about The Andersen frame (at least mine - older version) is labeled with "This side towards cab" but communication with Andersen verified I can install it either direction.
The ball leg of the frame is offset from the gooseneck ball connector by 5.375". So, that gives you 10.75" of adjustment fore and aft of the gooseneck ball (not variable adjustment, just 2 different "placements"). The adapter plate that mounts to the kingpin has a 4" offset, and can be oriented forward or aft, yielding an 8" difference. So, ranges of adjustment from the gooseneck ball (my example) can be:
Option 1
- frame pointed aft -5.375"
- adapter pointed aft -4.00"
total aft offset -9.375"
Option 2
- frame pointed aft -5.375"
- adapter pointed forward +4.00"
total aft offset -1.375"
Option 3
- frame pointed forward +5.375"
- adapter pointed aft -4.00"
total forward offset +1.375"
Option 4
- frame pointed forward +5.375"
- adapter pointed forward +4.00"
total forward offset +9.375"
This only addresses fore and aft adjustment. The ball has 3 height positions, measured from the bed of the truck to the top of the ball
+ 16.5"
+ 17.625"
+ 18.75"
