2006 Cadillac DTS Stabilitrac light is on

What type of wheels were installed and are they the same size as the OEM wheels?

The code you are getting is related to the YAW system. I will try to explain it. The Yaw rate sensor measures the car's rotation rate. Basically, the sensor determines how far off-axis a car is “tilting” in a turn. This information is then fed into a microcomputer that compares the data with wheel speed, steering angle and accelerator position. If the system senses too much yaw, braking force is applied. Lastly, the wheel speed sensors measures the wheel speed. If there is a change there (difference in wheel size) the stabilitrac system will malfunction and the ABS will stop working. The entire car is being monitored. Basically, steering, speed, stopping, the vehicle's axis is monitored, and everything comes together to determine if the computer needs to compensate for driver error. I hope this helps and doesn't add further confusion in your life.

As far as the parts they want to replace, I would have to question why they were fine prior to the new wheels.

Rey,

With the code which is present, the module sounds like the problem. However, it is strange that the problem started after the wheels were changed. I'm not sure why the TPMS was bothered with unless there was no signal from the sensor.

Without the vehicle in front of me, it makes it difficult. Can you leave it as they suggested? Yes, you can, but you will not have a functional stabilitrac system.

Were the new wheels or tires a different size?

I believe he is wrong too, but anything is possible anymore. As far as the offset, one would believe that small of a difference wouldn't cause the issue. However, these vehicles are so complex, it could.

Truthfully, I don't like spacers. Could that make a difference, yes.