Join Date: Jun 2011
Location: Tinley Park, IL
No, the only thing you would void is the item replaced. i.e. you can't ask GM for a new headlight when you've replaced it with a different one.
With that all said though, you most likely will still run into roadblocks if you go crazy with modding. You'll need to find a mod-friendly service department. When I had my GTO, my service department wanted to void out my electrical warranty because I had modded the motor and trans. I had to fight it and contact a regional GM rep to get my radio fixed. The rep agreed with me in the end, but the more you mod, the more you might have to fight for your warranty rights.
Left a 421RWHP 2004 GTO, but honestly loving the G6 GT coupe!
87' white Firebird(sold)
01' green Grand Am SE2(traded for the 03')
03' orange Grand Am SC/T(totaled)
04' blue GTO(traded for the G6)
00' tan Montana(I swear, its the wife's)
06' black G6 GT Coupe