Short answer: I replaced my DDM with ACDelco part and the issue went away.
Longer answer:
My seat issues started with the heated seat not staying on, driver side only. Passenger side had no problem.
Replaced heated seat element with Dorman 641-105 in September 2018 and confirmed that the...
I had the same issue on my 2003 Tahoe. My driver seat module needed to be reprogrammed. Here is the detail I found on it.
At first I didn't notice the opposite direction problem. Just the limited range of movement.
Good Luck!
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#PIT3598: Power Seat Switch Works in the Opposite...
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