Question about Chevrolet Tahoe

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I noticed that all gaguate reading sometime not right. I see all gaguate read at high for one trip. turn car off and start new trip the reading chnage signafiguntlly to very low. the car fuel if full while read is half.

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  • milahy_en535 May 19, 2011

    Voltage , temrature & oil gauges

  • milahy_en535 May 19, 2011

    intermittent(meaning not all the time)

  • milahy_en535 May 19, 2011

    My car is Tahoe 2008 and still under warranty. I got it to the dealer two time and they change battery and it cables, but I still see the problem happended again and agian. Now I can not trust the gauge reading any more.

  • milahy_en535 May 26, 2011

    I have a Chev. Tahoe 2008 and on July 2010 I noticed that panel Gagautes(oil, Voltage, Temp & fuel gagaute) read very hight at some point more than usaul and sometimes less(example fuel tank is full and reading is 75% ) I took car to agent and after one week they changed battery and its cables. however problem still there. I need your help please. thank you

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I have seen this in several different GM models....there may be the possibility that the ground connection from the battery is defective....you can check the ground connection coming off the battery...there is one that goes to the engine block and one that goes to the body of the car...the body ground is usually the culprit...make sure the wire going to the body is good(or even there)...if you don't have a wire there(or it has broken off) you can add one to the ground post of the battery and then attaching it to a place on the body...a good place is where the fender attaches...you can put a ring type crimp terminal on the wire and take out the fender bolt...put the ring terminal through the bolt and re-attach...another possibility with some GM models is the instrument cluster plugs in to a plug on the dashboard...there is the possibility that the connections on this plug have become oxidized and that the cluster is not making proper contact...you can remove the cluster and try reseating it to see if this solves the problem....and finally, there may be the possibility that the voltage regulator in the alternator is going bad...the way to check this is to obtain a voltmeter and check the voltage on the battery with the car running....it should be around 14.4-15 Volts DC...if the voltage is around 12.5 - 13 Volts DC with the car running, then the alternator is not working and therefore not charging the battery or providing enough voltage in order for the gauges to work properly

Posted on May 26, 2011

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  • Master
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Thanks for choosing FixYa and welcome. Besides the fuel, what all is reading wrong?

Posted on May 19, 2011

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  • Richard Hale
    Richard Hale May 19, 2011

    Also, is it always like this or does it just happen from time to time?

  • Richard Hale
    Richard Hale May 19, 2011

    I see that this happens from time to time. You may have a bad dash cluster that is causing this. If so, you are looking at a few hundred dollars in repair charges. If you are able, you need to get to the cluster wiring harness. You will probably have to remove the dash. You might have a bad wire, break, or loose connection in the harness. Once you have found this, try wiggling some of the wires and see if that helps any. You can also test the wires with a voltage meter for current also if you wish. Check and pay close attention to the wires and connections. Make sure none are damaged. It is possible that you can visually see the damage on the wires and know exactly which one it is. Most times, it doesn't happen that way but every now and then you can get lucky. If you have someone to do this for you, it will cost hundreds of dollars. I would try getting a Haynes manual for your vehicle. I believe it has information on how to take the dash off but I am not 100% sure on that. You should ask first before your purchase. Since it is all of them I believe, the problem should be in that general area Milahy.

  • Richard Hale
    Richard Hale May 19, 2011

    Are you able to get the dash off?

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