Question about Chevrolet Silverado 2500HD

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I have a 2002 chevy 2500 4x4 with the 6.0 and after about 10 minutes of driving, the fuel gauge goes crazy, the ABS and brake warning lights come on and the ac stops blowing cold. What is wrong. Is it a computer problem?

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  • trinitycusto Jul 24, 2009

    so you do think it is a computer problem?

  • trinitycusto Jul 25, 2009

    I have not had the truck checked out yet because of the cost....I wanted to go this route first. There have been a few times that i have seen the check engine light flash a series of times but have never counted the number of flashes. I am sure that is a code but have not had a code reader hooked up to it yet. So you dont think it's a computer problem? i thought it was either that, a bad ignition harness or pin, a bad ground somewhere or a shorted wire somewhere because it takes a few minutes for it to heat up. Just some thoughts. I suppose i should go get an obd-II reader.

  • trinitycusto Jul 25, 2009

    I have tested the ac and the pressure is good but I have tried to bypass the low pressure switch to kick on the compressor. Is that controlled by the ECM?

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  • Chevrolet Master
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You will need to have the BCM (body controlo module) tested for trouble codes by the dealer, but this does sound like the BCM is defective, no way to know for sure until the dealer has hooked up there special scan tool and read the module for trouble codes..

Posted on Jul 25, 2009

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There are quite a few TSB out there for this vehicle one of them for the brakes. Also there are many many people with fuel gauge problems with the 99-03's. You may have another issue though. Have you had the vehicle checked or which codes are being thrown? Does it effect the performance acceleration/braking at all? Once I have more information I can assist you further.

Brakes: SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT Service Bulletin Number: 40525002 NHTSA Number: 10022470 Model Years Affected: 1999, 2000, 2001, 2002, 2003, 2004 Date of Bulletin: 08/2007 Bulletin Summary: ABS LIGHT ON, DTC'S C0265, C0201, U1041 SET AND/OR LOSS OF COMMUNICATION WITH BRAKE MODULE. (REGROUND EBCM GROUND).

Thank you,
Lee

Posted on Jul 25, 2009

  • Lee A.
    Lee A. Jul 25, 2009

    First here is one thing for the abs,

    A poor electrical ground under the battery tray may cause the ABS light to illuminate.

    Also there are alot of issues with the A/C on these vehicles this is the cause and it's basically repair is or living with it are your two options.

    The heater & A/C (HVAC) temperature and air delivery mode door actuators may fail causing improper temperature or air delivery.

    As always anything is possible especially with the technology involved with vehicles now. Are you planning on trying to fix this yourself? I would inspect the ground under the battery tray. Sometimes bad grounds can do a lot of weird things. If you still have questions or need further assistance please let me know.
    Thank you,
    Lee


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  • Chevrolet Master
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I would have to agree. Probably your best bet is to go to a good auto wrecker and get one. If that isn't the problem, at least you can return it.

Posted on Jul 24, 2009

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