Question about 2004 Buick LeSabre

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Speedometer problems The speedometer on our 2004 LeSabre with 20,000 miles on it suddenly became erratic and jumped to 120 MPH and stayed for a few miles, then jumped to 140 MPH. We were driving in a traffic flow of about 60 MPH. After a few miles the needle went completely to the top and dropped all the way down to the right. When starting the car now in idle it again goes up to around 1 120 mph. We have had no recent repairs other then the replacement of the PVC valve. We are no longer in warranty. I would like to know what the likely problem is before taking it to a repair shop. Speed sensor, vacuum hose, loose wire, speedometer cable, or what? I would appreciate any feedback or assistance.

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  • Anonymous Feb 11, 2009

    I have the same problem with the speedometer. But also the tach and fuel gauge. I'm told it's in the instrument cluster.

  • pastorjim Feb 12, 2009

    The speedometer on our 2004 LeSabre with 74,000 miles on it suddenly became erratic and jumped to 120 MPH and stayed for a few miles, then jumped to 140 MPH. We were driving in a traffic flow of about 55 MPH. After a few miles the needle went completely to the top and dropped all the way down to the right. The needle stays at 140 mph

  • primo1ok Feb 12, 2009

    we had to have our buick lesabre (2004) speedometer replaced because it showed erratic readings all the way to 140. It cost over 500 dollars. We are now in conversations with Buick customer service to see if they will reimburse us for this problem because there are other people with the same problem

  • lfeuerbach Feb 16, 2009

    speedomter went to 35- 50 mph---then went straight down and stayed there

  • luckydadl Feb 24, 2009

    I also have the same problem my speedometer is pointing stright down.

  • mcblue Mar 12, 2009

    My 2004 Buick LeSabre does not have speedometer problems yet, but I do have the same erractic behavior with the fuel gauge (does not work anymore), the temperature gauge and sometimes the RPM gauge. I have spent $500.00 for some new part in the fuel tank which did not fix it, now am told that it is probably in the instrument cluster. After reading other posts I am wondering if it has something to do with OnStar? I had no problems until I did not renew my OnStar subscription. Any one else out there with the same scenario?

  • mityerac May 20, 2009

    Primo1ok,

    Any Luck, I have the same problem

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  • 548 Answers

It may be that the speedo cable has come loose at 1 end and will need to be tightened back up. Sorry but not sure where ends are attached on your car.

Posted on Mar 28, 2017

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Posted on Jan 02, 2017

  • 180 Answers

SOURCE: speedometer problem

Take the cable off of the trans. hook back up to speedo. try turning again,if works look at speedo. gear in transmission, if does not work it will be the cable.One bolt and the driven spedo gear will come out look for wear or flat spot.

Posted on Jan 21, 2009

  • 13 Answers

SOURCE: I have a 97 Lesabre limited that the odometer

You most likely have a defective gauge cluster assembly. GM offers repaired clusters for some models, but they can be costly. (300-400bucks)

Posted on Jul 07, 2009

  • 366 Answers

SOURCE: 2004 Buick LeSabre. First noticed speedometer was

sounds like an instrument cluster failure or a computer problem.

Posted on Nov 22, 2009

  • 82 Answers

SOURCE: speedometer stopped working, fuze looks fine,

Your speedometer cable is broken. all you need to do is replace it.

Posted on Aug 25, 2011

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