Where is the TCM located?

Tiny
BOBBY7789
  • MEMBER
  • 2005 PONTIAC GRAND PRIX
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 260,000 MILES
I'm needing to replace the TCM in my car listed above GT, but can't find where it's located?
Sunday, April 7th, 2024 AT 3:15 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,217 POSTS
Hi,

This vehicle doesn't have a separate module for the transmission (TCM). Instead, the transmission is controlled by the powertrain control module (PCM). It is located at the front left (driver's side) of the engine compartment.

I attached the wiring schematic below, so you have a reference.

Let me know if this helps or if you have other questions.

Take care,

joe

See pics below. Note: I had to cut the schematic in half to make it readable. I did overlap the two so you can follow from one to the next.
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Sunday, April 7th, 2024 AT 7:04 PM

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