Question about 1999 GMC Sierra

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My truck doesent shift on time & winds hard

My truck takes a long time to shift & then it winds hard after. it feel like it's having to struggle to go into gear.

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  • rpelrine Feb 10, 2009

    my truck is doing the same thing. i just added transmission oil which was low, it didn't help. i just disconnected the battery to see if i an reset the computer. i'll let you know if it works. its a 2004 gmc sierra denali.

  • rpelrine Feb 10, 2009

    i tried resetting the computer, it did nothing. if you come up with something, can u let me know please, thanks!

    R.J.

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Have someone check your timing, or it could be some kind of sensor. or you could just have someone hook it up on a to a diagnostic machine (like for your inspection, that plug in)

Posted on Feb 03, 2009

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