Question about 2002 Buick Rendezvous

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2002 buick Rendezvous dash lights/gauges/radio go on & off

My dash blinks on and off and the radio and windows don't work when this is happening the car keeps running though 2002 Buick Rendezvous when i turn my key to on or start my dash is flashing and door locks keep locking my windows dont work and a/c dont work ... a couple of times it started normal and no blinking and a/c worked but no windows Please email me with any help Thanks Kevin I have the same problem as posted by "bodyman", my dash lights and gauges go on & off, windows operate extremely slow (with engine running). It started intermittently but now does it everytime it's started. It appears many people have this same problem in some form or another from posts on many different sites on the net. However the solutions are very few. I have seen that the "body control module" has been replaced in several cases but it wasn't clear if this solved the problem, I also have seen where a wiring problem may have caused this. Several posts list the wiring on the floor behind the drivers seat and one very well written by "Roadside Jerry" stating a wiring rub through on the transmission side cover. It appears the problem is likely a wiring issue that is one of the hardest problems to find/fix, taking a skilled mechanic, the reason for very few post of a solution. any cures for this problem would be appreciated.

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  • dpytlik Aug 15, 2009

    Problem was corrected by replacing the body control module. This required the front seat and center consule to be removed to access the BCM, then the program downloaded to the new module. My mechanic diagnosed the problem but had to take it to a GM dealer for the module programing (he did not have the equipment to perform this task). I bought the module online (saved $100.00) and he took it to the GM dealer.
    All told it cost me just under $700.00, mainly due to diagnostic time for my mechanic to find the problem (7 hours). Also the key fob needs to be programed with the new BCM, remember to take your spare, It won't unlock the doors without reprogramming.



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Hello, I work for a GM dealer in Texas. I have seen this issue a couple of times, on your model and several times on the Trail Blazer. That vehicle has a cassette type ignition switch, that have had some issues. It can lose one leg of the switch intermittently and cause several things to go nuts. I just looked on our service site and there are no bulletins related to the issue. If you know a tech at a dealership, have him scan the vehicle for codes and send them to me. Also ask him to check the power mode operation on the scanner, It will let you know for sure if it is a ignition switch.The switch is easy to change and costs about $35 so it is not going to break the bank. Electrical problems are difficult to diagnose at best but really hard not being there to do the testing. If you can give me any codes/ power mode info I will be better able to help you. Good Luck

Posted on May 29, 2009

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My 2002 had this also. Of course, it went bad on vacation! After putting up with it for a couple of months and much research, I found that it was the body control module (BCM). I replaced it myself, but you have to have the GM dealer program it. Most everything works after you install it, but not the radio and it disabled my airbags. You have to use a new one, you can't reprogram used ones. It sits on top of the fuse box, inside the center console. The console has about a dozen screws to find to take it out. Online directions I found showed the BCM was easy to remove after that. Not for my car. I had to remove the fuse box to pop the BCM off the top. BSM was about $170, programming was about $120.

Posted on Nov 03, 2014


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My 2002 buick rendezvous radio lock came on and my dash lights will not come on now

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Security Light on and gauges now not working

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