Nothing appears to be loose or wrong with the harness (at least that I can see, I've had it off many times). An internal wiring harness and case connector assembly links the internal components with the Transmission Control Module. I've tried diaelectric grease, cleaning/inspecting the terminals and harness but nothing seems to keep the problem away.
#2012 GMC 3500 TCM CONNECTOR ENDVIEW HOW TO#
So my question is, I'm about 99% sure the problem has to do with the area of that TCM harness but not really sure how to permanently fix it. I experimented with removing the tapshifter harness (problem was still there without the tapshifter harness), and "wiggling" the top connector of the TCM and this would temporarily fix the issue. (knowledge of Italian and Spanish) is desirous of secur ing a new connection. It was fine for literally a year, but within the past year and half or so, I started getting lack of power and rough shifts. IUMdWA3kTCm MATTER JUNE 23, 1879, AT THE POST OFFICE AT NEW ENTERED A3. Took it back to the installer, they said the tapshifter harness on the TCM wasn't in all the way and boom, fixed. Let me explain.Ī few years ago, I had the LLY tapshifter installed and maybe a few months later, had an episode where my truck wouldn't move at all. /rebates/8099&.com252ffind252f2012-gmc-sierra-3500-hd-transmission-control-module.
I've figured out where the problem is, but not really sure of the fix. Hey guys, i've had an ongoing shifting/hesitation on acceleration issue for a few years now.
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