Question about 2003 Buick Rendezvous

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After some running around started the 2003 Buick Rendezvous(it started and sounded good)and the communication center went through a bunch of warning signals then I lost all dash board readings ie: heat gauge, speedometer, also the radio and could not open back hatch. When I finally got home and shut the vehicle off the head and tail lights would not go off until I must have hit the right button or wiggled something. This morning she started up fine and everything was working again. I just do not need this to happen again it is weird trying to drive with not speedometer. Why or What would cause this, Thanks

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It's most likely the wiring harness that runs under the body and up through the floor, located under the driver seat. Search online and you will find discussion and repair videos to help you with your issue. (It's too lengthy to go into the diagnostic and repair specifics on this forum.)

Posted on Dec 12, 2014

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Check the body to chassis earth strap as well as the earth for the body control module. remove them & roughen them with emery cloth re attach and make sure they are tight.

Posted on Dec 13, 2014

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Check body module and all ground wire

Posted on Dec 12, 2014

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Check both battery terminals. Remove them and make sure the connections are shinny and no sign of corrosion or missing metal. Then replace.

Posted on Dec 12, 2014

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A short or maybe a ground wire somewhere not getting good connection

Posted on Dec 12, 2014

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