Codes p0700 and p0722, where is the TCM located?

2005 BUICK LA CROSSE
21,100 MILES • 3.6L • V6 • 2WD • AUTOMATIC
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CHRISAGG100
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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
Jun 28, 2025 at 5:54 AM
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MECHTRIX
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It should be down under the left side of the instrument panel.
Jun 28, 2025 at 11:02 AM
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CHRISAGG100
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Under the dash? And do you have a diagram?
Jun 28, 2025 at 11:39 AM
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MECHTRIX
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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
Jun 28, 2025 at 4:42 PM
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CHRISAGG100
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On the driver or passenger side ?
Jun 28, 2025 at 4:51 PM
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CHRISAGG100
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Do I have to remove anything to get to it?
Jun 28, 2025 at 4:53 PM
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MECHTRIX
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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".
Jun 29, 2025 at 9:41 PM
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STRAILER
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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.
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Jul 14, 2025 at 12:26 PM