Where is the TCM located?

Tiny
JOE WINDER
  • MEMBER
  • 2008 BUICK LUCERNE
  • 3.8L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 133,500 MILES
I need the exact location. So, I can replace. The car listed above is CXL model.
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Sunday, February 27th, 2022 AT 4:16 PM

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Tiny
SQM
  • EXPERT
Hello,

The transmission control module (TCM) is located on the left rear of the engine compartment. I have attached the diagram below for your reference.

Please note that the replacement TCM will need to be programmed to the vehicle in order to function properly. This will require a scan tool.

I have attached the programming procedure below as well.

Let me know if you have any questions.
Thank you.

https://www.2carpros.com/articles/how-a-car-computer-works-pcm-ecm-bcm
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Monday, February 28th, 2022 AT 11:38 AM

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