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Posted

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

Posted

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

Posted

I read that the "3rd" brake light could cause the cruise not to work, but cause it to be intermittent?

Posted

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)

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