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Old 12-19-2019, 03:37 PM   #3 (permalink)
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Join Date: Nov 2006
Location: South Central PA
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Originally Posted by GL1800 View Post
I had the same symptoms and it turned out to be the transmission Control Module. Changed it out and never looked back.

Interesting. Did yours act up only when in gear, or in park as well? Can I swap in a TCM from another LML to test, or do they have to be programmed?
2007 Classic Chevy 2500HD LBZ LT CCSB
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