I suspect had his radio stopped playing or his HVAC quit cooling, the warranty would still apply.
It was a stretch, a stretch I would not have foreseen, but I can see how GM would argue the warranty did not apply.
I bet that GM is contacting dealers to warn them about installing aftermarket products that are not sanctioned by GM.
I am thinking about the liability to GM & the dealer on this: Had the truck actually rolled over, can the owner sue the Dealer for installing the lift kit? Can he sue GM, since "an authorized dealer" installed the lift kit?
2015 Canyon SLT, Copper Red, 2WD, CC, SB, V6, Tow, blk leather, factory spray liner, safety pkg, generic roll up bed cover.