Without looking into my laptop the at4x 2500 trucks get the G94 option code electronic selectable rear locking diff. Just looking at the order guide doesn’t give me the supplier but I’m guessing it’s probably an Eaton unit. 2500’s don’t get a front locker like the 1500’s and Canyon/Colorado versions get.
I’m somewhat shocked (pun not intended )a at4x facebook group wouldn’t know about the type of shocks they run.(though Facebook groups aren’t full of Mensa level smarts either) They are Multimatic DSSV units and are pretty killer units in the world of off road shocks. Surprisingly the first vehicle used them on was the gen 5 Camaro ZL1 proving it’s not just good off road. DSSV stands for dynamic suspension spool valve. Which that’s where the magic happens. The spool valve , which is located in part of the big blue anodized reservoir is what allows the shock to change calving based on how fast the shock piston is moving. It’s completely mechanical and yet can still adjust valving in milliseconds without a computer.
If price is any indicator, back when I was at the dealer the Colorado rear DSSV shock was about $1800 per unit over the retail parts counter. It’s just as spendy as any other high end aftermarket off road shocks. One thing that GM does not advertise is like other high end shocks they are rebuildable. GM dealers won’t do it but there are some places you can find online to rebuild them.
