Codes P0700 and P0722, where is the TCM located?

Tiny
CHRISAGG100
  • MEMBER
  • 2005 BUICK LA CROSSE
  • 3.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 21,100 MILES
I'm not getting a signal from my speed sensor and I'm getting a tribute code p0700 p0722. I also need to know where the TCM is located
Saturday, June 28th, 2025 AT 5:54 AM

7 Replies

Tiny
MECHTRIX
  • MECHANIC
  • 382 POSTS
It should be down under the left side of the instrument panel.
Was this
answer
helpful?
Yes
No
Saturday, June 28th, 2025 AT 11:02 AM
Tiny
CHRISAGG100
  • MEMBER
  • 5 POSTS
Under the dash? And do you have a diagram?
Was this
answer
helpful?
Yes
No
Saturday, June 28th, 2025 AT 11:39 AM
Tiny
MECHTRIX
  • MECHANIC
  • 382 POSTS
Yes under the dash. Lower left side bottom of the instrument panel as far as I know unfortunately I dont have a diagram handy. But it should be there. Good luck
Was this
answer
helpful?
Yes
No
Saturday, June 28th, 2025 AT 4:42 PM
Tiny
CHRISAGG100
  • MEMBER
  • 5 POSTS
On the driver or passenger side?
Was this
answer
helpful?
Yes
No
Saturday, June 28th, 2025 AT 4:51 PM
Tiny
CHRISAGG100
  • MEMBER
  • 5 POSTS
Do I have to remove anything to get to it?
Was this
answer
helpful?
Yes
No
Saturday, June 28th, 2025 AT 4:53 PM
Tiny
MECHTRIX
  • MECHANIC
  • 382 POSTS
Yes it should be on the driver's side. You'll need to remove any panel screws straps, plugs that might be covering or holding it in or connected to it to remove it. Hope this helps good luck".
Was this
answer
helpful?
Yes
No
Sunday, June 29th, 2025 AT 9:41 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Before replacing the TCM you might want to check the fuse: TCM fuse #8 and Trans sol# 21 in the fuse panel under the hood which powers the TCM.

Code P0700 - Transmission Control System (MIL Request)
Code P0722 - Output Speed Sensor No Signal

This guide can help you test the fuse for power as well, (key on)

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Here is the location of the fuse and the TCM is located at the left front of the engine compartment. Check out the images (below). Please let us know what happens.
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Monday, July 14th, 2025 AT 12:26 PM

Please login or register to post a reply.