haha I love it when people fly the "oh well theres the magnuson-moss act! I can mod the hell out of my truck and have that to fall back on!!!".
That law is the biggest crock of shit in this day and age. It was written back in the 1970's when everything wasnt "by the book" and "technical" and "official" from GM. There were (basically, you know what I mean) no lawyers back then, no real computers, etc...
In this day and age, GM can void the warranty for whatever they want. It doesnt matter what you do, GM's lawyers are better paid and better in court than your lawyer. Fighting GM on a warranty claim because you blew up your engine or smoked your trans after you tuned it is a long expensive battle that you will never win.
Its not like GM doesnt warn you, its not like GM doesnt clearly state/spell-out "if you plug something in and it makes the engine produce 361hp instead of 360 (LMM) or 398hp instead of 397hp (LML), IT WILL VOID YOUR WARRANTY! This isnt a hard concept to grasp.
I think its funny when people try to play dumb and get GM to warranty ridiculous claims that were caused 100% by what the owner did to his truck. And then they cry when "stupid worthless GM" laughs in their face and blocks their warranty.
06 audi S4, V8/6spd
05 dmax/allison...always testing something new
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