Question about 2004 GMC Sierra

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2004 Sierra Speedometer Problem

I've had one episode recently of complete shutdown of the speedometer after watching it hiccup around 65 mph. The rest of the instrument cluster was fine as far as I know. The next morning it worked fine and it's been fine for the past 2 days. My usual dealer said it would cost at least $300 to replace, but they don't recommend it since I don't have an extended warranty and it's working OK now. Another GMC dealer in town said they feel badly that it has failed and it will fail again. They will replace or repair it for free knowing I have no warranty left. The truck has 51,000 miles 90% of which are highway miles. Any thoughts on what to do? Sometimes a kind offer is just a kind offer. Sometimes there is a hidden agenda. Sometimes you should just leave well enough alone. What's going on with the Sierra's speedometer? Is it a known problem? I have a 2004 GMC Sierra my gage cluster stops working the volt,fuel,temp,oil press gages in the position where they would be with truck turned off the speed o is about 20 miles per hr off, the tach is about 1000 rpm off, the ABS light is on. The gear slector and milage has no data. The truck has 22853 miles on it but the 3 year 36000 mile warrnty exspired last year. Is there any way to fix this with having fork out a lot money? Thanks for any help.

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  • cobertur Apr 13, 2009

    Thanks for your reply



    i have seen a lot of post online about simular problems and would like to know why gm is not offering to fix this problem. I am going to my dealer today and talk face to face see what can be done. I purchesed the truck in 2005 it was new 3 year 36000 mile warrnty, the truck sits parked and is driven on when im home which is about once a month, i travel all over and that is why the truck does not have many miles on it. I will let you know what happens at the dealer again thanks.







    Charles

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Having worked in a new car dealer for this truck here is what I know about this problem, it is either a loose of signal from the Vehicle speed sensor due to a faulty sensor or a poor connection to the sensor on the trans or the little motor that moves the needle is defective or the connection to the speedo is defective from the main harness, I would check the connector at the Vehicle speed sensor for water intrusion and if u see that is ok replace the speed sensor, this is the most common problem, here is a picture of the sensor which is on the outside of the trans case, the part on rock auto.com is just $23
DELPHI Part # SS10302 original equip part (they supply GM)
2004 Sierra Speedometer Problem - f5c3c84.jpg

Posted on Apr 13, 2009

  • yadayada
    yadayada Apr 13, 2009

    I think I have found the problem with the intermittent speedo reading/operation, metal particles get on the magnetic end of this sensor and degrade the signal, this can cause anything from erratic readings to not working at all, it can come and go, the older sensors wear a gear driven tiny signal generator, these new sensors are magnetic induction sensors. Pull your sensor out and look for metal on the end of it.

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There have been a lot of troubles with Chev/GMC IP’s (instrument panel) doing what you’ve described.
It would only take a couple of minutes to confirm this with a scanner that is capable of commanding the IP to do a full needle sweep of all gauges. If some do not do as they’re told, then you would either replace the IP cluster or have it rebuilt.
The legal way of having an IP replaced or rebuilt would be to send it into an authorized facility where they would certify that the mileage on the odometer, has not been tampered with and is accurate, as to what they found on the original.

I hope that solves your Problem, If so kindly accept it.
Thank You, Arjun.

Posted on Apr 13, 2009

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