jon1178 Posted March 22, 2005 Report Share Posted March 22, 2005 Modifying your PCM sound like the perfect way to get some good,cheap, easily installed horsepower but will this affect the warranty on my SS. Link to comment Share on other sites More sharing options...
2003SilvSS Posted March 22, 2005 Report Share Posted March 22, 2005 More than likely not. Unless it is a computer controlled problem, more than likely the GM tech will not ever read your PCM. Even if they do read your PCM, most tech's won't notice. Some people on here put superchargers on their trucks and GM will still do warranty work. Just my .02 Brian Link to comment Share on other sites More sharing options...
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