Question about 2001 GMC Savana

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Service engine light won't go off after tune up

I have a 1996 GMC Savannah conversion van. had a tune up completely, because light that said service engine soon was one. light is still on what is it thanks

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  • gramof9 May 18, 2009

    the information was helpful but the van is not with me but will have someone take a look at it to determine what else can be done. thanks

  • Keith Heavilin
    Keith Heavilin May 11, 2010

    I am assuming that the light was turned off when the service was complete and it came back on?  Have you had the code read to see what it is?


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Ok, when the service engine light is illuminated, this Will represent a failed sensor or a malfunctioning cpu that will need to be diagnosed by a service tech. this light has a trouble code that will have all information that you will need to fix what the light is signaling at this time. you will need to take the vehicle to a mechanic or the dealership so they can connect the diagnosis cpu to your in Car cpu port. this diagnostic cpu will download the actual description of the issue at hand and , it Will direct you to the location of the problem with this engine as well.

In most cases, it will be a failed sensor of some sort.

Posted on May 18, 2009

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Restart the computer, disconnect the negative from the battery, wait five minutes then reconnect. Let me know if it comes back on.

Posted on May 18, 2009

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