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.
Car problem reports
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Most reported 2006 Cadillac STS problems
A loose or worn gas cap could be cause the Check Engine Light to illuminate.
The rear axle pinion seal may leak causing fluid loss and possible internal rear end damage. Replacing the faulty seal will commonly correct this concern.
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.
The steering wheel position sensor may fail, resulting in the service stability message being displayed.