I had my 2012 GMC Terrain serviced:
- Tire Rotation
- Brake System Flush
- Wheel Alignment
Before taking the vehicle in, there were no outward signs (alerts, false-positives or otherwise) of any problems with any of the tire pressure sensors. During the service, the rep from the GMC dealership called and said we are now getting a fault in tire monitoring system and they quoted me $250 to replace the sensor. After explaining to him that we didn't have a problem before we brought the vehicle it, he said that the sensor was probably going out and having the vehicle service revealed the problem.
We declined to repair the sensor due to the price, but now the dashboard throws up all kinds of persistent and annoying warnings.
So my question is, during the course of having these services performed, is it more likely that the sensor was damaged by the technician, or is the claim that we brought it in with a bad sensor, and the act of servicing the vehicle made us aware of it?