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Message: <blockquote data-quote="jackinok09" data-source="post: 4037636" data-attributes="member: 51322"><p>black and white wire coming out of harness by firewall connects to bolt on transmission, that's the ground for computer system. if its loose broken, frayed etc. etc. you'll never get it to stop getting the reduced engine power code. WHY the gm engineering idiots decided to put it there is total stupidity. since the computer has no ground it will show anything as a fault code. on my 2004 its about center of engine. drops down to top tranny mounting bolt. rats love to chew on it also since its sort of hidden.</p></blockquote><p></p>