Hummer H3T The popular H3 gets the added capabilties of a small pick-up, with the look and performance of the original H3.

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Old Oct 31, 2025 | 02:22 PM
  #1  
2009h3t's Avatar
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From: FL
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Just received this error code, my OBD scanner will only indicate it's a TCM issue. I've checked wiring and fluid level, all good. The videos I have viewed show numerous "possible" fixes. Is it best to go to a shop that can provide a more thorough scan to determine the issue?
 
Old Oct 31, 2025 | 06:51 PM
  #2  
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Joined: Jul 2012
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From: C-Town
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Originally Posted by 2009h3t
Just received this error code, my OBD scanner will only indicate it's a TCM issue. I've checked wiring and fluid level, all good. The videos I have viewed show numerous "possible" fixes. Is it best to go to a shop that can provide a more thorough scan to determine the issue?
Did you scan all modules for error codes?
P0700: Transmission Control Module (TCM) Requested MIL Illumination


 
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