Did they check your sway bar links?
Also check they sway bar at the ends, they crack sometimes..
Check the ride height from side to side, right side could be lower.

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2004 Hummer H2 " Metallic Red "
20 inch Mojave's (Teflon)(325/60/20) BFG A/T's
MagnaFlow kitty back...Hypertech Tuned..Music to my ears
HCMI Member 50043