Question about 2003 Hummer H2

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2003 H2 transmission


Our H2 is only 5 years old. We have it maintained every 3 months. What might have caused the transmission problem. I have to pay almost 3K to have it replaced.

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  • daninfl Sep 22, 2008

    2005 H2 lost drive and reverse gear during acceleration.
    Could this be a solenoid problem or a pump failure?


  • Anonymous Jan 03, 2009

    dont drive forward or back

  • dpatel77 Mar 08, 2009

    I think I have the same problem might have to replace the transmission. Infact I have really kept my H2 in a great condition with regular service etc... don't drive it much. I totally lost power and wont go from 1st or 2nd gear with high RPM. Any suggestions I am in europe we don't have a dealership in Romania.

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  • Hummer Master
  • 61,037 Answers

Most likely a defect in the trans from the factory

Posted on Sep 21, 2008

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1 Answer

At what RPM 1st gear should shift on a H2 Hummer 2003


well is that hummer that a 2 ton or 4 ton vehicle ?

would take a lot of revs for first gear to make it roll from a standing start
think it will be fitted with an 6 speed automatic transmission

guessing only from my heavy vehicle driving experiences
first should change below 3000 rpm

if transmission was slipping in first gear you would know

suggestion
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