Question about 2003 Chevrolet Silverado 2500HD

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ABS/Brake lights are on, Speedometer stopped working, truck shifting extremely hard. all this happened at the same time.

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  • Chevrolet Master
  • 22,095 Answers

Change the brake light switch this is your problem for the brake lights ,the speedo and the gearchange are different problem and i would suspect the speedo pick up sensor its on top of the diff output drive shaft passenger side .Providing that its normal wiring and not a CAN bus line because if it is then it could be a parallel resistor playing up which would knock out more that one thing but i have no product knowledge of this american vehicle .sorry

Posted on Nov 09, 2010

  • DYWTFW Nov 18, 2010

    My 03 z 71 spedo quit working, there was a dealer recall on mine as long as there was less than 70k on it the whole gauge cluster had to be replaced. I had a 99 Z 71 and the ABS light came on and would not turn off, I could also hear the pump running all the time, even when the truck was off turned out that a relay inside the ABS pump was bad, dealer said 900.00 for the part. I just pulled the ABS fuse and went about my way.

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