One problem related to warning light on has been reported for the 2007 Cadillac STS. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Cadillac STS based on all problems reported for the 2007 STS.
Passenger air bag warning light - dealer will not fix for less than $800. 00. Same issue as 2007 Cadillac cts. See below. This was a company car built early for employee evaluation. I am sure it was the same seat system general motors is recalling certain model year 2005-2007 Cadillac cts vehicles. Some of these vehicles have a condition in which repeated flexing of the passenger sensing system mat in the front passenger seat may cause the mat to kink, bend, or fold. This flexing can break the connections in the mat. If this occurs, the sensor may not detect the presence of a front seat passenger and will disable the air bag.