One problem related to engine clicking and tapping noises has been reported for the 2006 Cadillac STS. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Cadillac STS based on all problems reported for the 2006 STS.
The car spark plugs keep going out and the car is make a clicking noise it is silender 1 and 3.