CampingN.C. wrote:
I'm going to go out on a limb here and say you don't need them or any other type of suspension mod. Although my 2500HD is older than yours I'm running around 1400# tongue weight, truck sits perfectly level.
Adding a spring will kill the ride and leave the truck sitting higher in the back unloaded.
If the truck sits level when hitched up (like its supposed to) and it tows fine I'd leave it, unless your looking at hauling a golf cart or something heavy in the bed. Otherwise a 1200# 'properly distributed' hitch weight is nothing on a 2500HD.
My two cents.
X2.
The OP says the rig handles fine and the truck is level (1/4 inch).
I would use the cost of bags/springs and buy the wife a new gadget for your garage :).