When replacing the TCM does it need to be reprogrammed?

Tiny
CLANG114
  • MEMBER
  • 2001 CHEVROLET 3500
  • 8.1L
  • V8
  • 2WD
  • AUTOMATIC
  • 240,000 MILES
Replaced my TCM with a used one does the used one need to be reprogramed to my VIN?
Sunday, September 7th, 2025 AT 7:23 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Yes it does. The dealer or a shop with a GM Tech 2 scanner or modern J2534 pass-thru device can reflash the TCM with your truck’s VIN and latest calibration
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Monday, September 8th, 2025 AT 11:39 AM

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