Join Date: Mar 2006
Location: Minco OK
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Simply cannot tell if the shocks are the problem until you change them. There may be absolutely nothing wrong with those shocks as built, for a light gas truck. Regardless of their marketing, most of these lift kit shocks are NOT valved correctly for a diesel truck. That takes a customized shock like Fox or King, or, a cheaper alternative is the Bilstein 5100 or 5160 series shocks, they are valved specifically for the diesels and do a much better job of rebound control.
The 5100 series is a bolt in for a 3" lift and as long as you aren't going for big articulation should work fine. IF you try to drop the axle too far they will hit the stops with a 3" lift and thta will eventually kill them, but, that takes some extreme terrain and jumps to do that.
The 5160's are a remote reservoir shock and work EXCELLENT for rough roads and heavy loads that cause most shocks to be useless once they warm up. Biggest problem aside form valving is the fade when they get hot which they can do on round roads. The 5160's will require a modified lower rise shock tower to work correctly so not exactly a bolt in application.
05 QC LWB 4x4 Auto 3.73 LSD, IssproEV2's, Performance 48RE Opie TransGo , Smarty Tuned BBI Injected