and stick to GMPP parts and you will have no warranty issues as it states as warranty:
GMPP installed by dealer at the time of purchase=normal warranty applied
GMPP installed by dealer=warranty 1y-parts and labour
GMPP installed by yourself=warrantyh 1 y parts
either way the rest of the unaffected parts will keep its warranty intact
good luck staying away from being tempted, I caved!
MODS: GMPP "Performance" cat-back, GMPP intake, GMPP extrude honed header, GMPP ground effects kit, lip spoiler, gen 4 headlights, DC sport strut tower brace, splitter, vortex generators, motegi SP10, Iridium spark plugs, ractive aluminum pedals, white carbon shift knob, shorty antenna, 4300K HID low beams (screw electricals warranty)