Question about 2004 GMC Sierra 2500

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Transmission protection mode

My 2004 GMC 2500 keeps going into protection mode and making weird noises and slipping at initial excelleration, even when it is cool outside and not hot. I only have 30,000 miles on the truck.

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  • Anonymous May 23, 2009

    I have the same problem with the ttransmission slipping at take off on my Sierra 2500 HD

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  • 315 Answers

Not able to diagnose such a problem without looking at the truck. Have the dealership troubleshoot. Still got warranty?

Posted on Mar 03, 2009

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