A loose or worn gas cap could be cause the Check Engine Light to illuminate.
2010 Cadillac STS Problem Reports
RepairPal Verified 2010 Cadillac STS Problem Reports
The front turn signal and and daytime running light bulbs are prone to premature failure. Our technicians tell us that these bulbs can be very difficult to replace.
Failure of brake components can be caused by contaminated brake fluid. To help prevent this the Brake fluid should be flushed at the very least every 60,000 miles.