beachbum77 Posted October 31, 2013 Report Posted October 31, 2013 Hi everyone, I have a 2004 GTP Grand Prix that has suddenly started dropping cruise intermittently. Seems to mostly happen when going downhill. I can do a resume and it will work for a bit, then go off again. Any ideas? Thanks, Brad Quote
l67ss Posted November 1, 2013 Report Posted November 1, 2013 Bad relay? Hi everyone, I have a 2004 GTP Grand Prix that has suddenly started dropping cruise intermittently. Seems to mostly happen when going downhill. I can do a resume and it will work for a bit, then go off again. Any ideas? Thanks, Brad Quote
beachbum77 Posted November 1, 2013 Author Report Posted November 1, 2013 I read that the "3rd" brake light could cause the cruise not to work, but cause it to be intermittent? Quote
beachbum77 Posted November 3, 2013 Author Report Posted November 3, 2013 Not the brake light. They all seem to be working fine. Quote
95 vert Posted November 4, 2013 Report Posted November 4, 2013 There's different contacts/switch for the cruise than the brake lights. Every GM I've had for the last ten years has been a brake light switch causing intermittent or inop cruise. Got a scan tool? Check for "brake applied" (without touching the brake pedal) Quote
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