One problem related to starter 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.
Air bag light constantly stays on, along with the check engine light. Seat belt chime constantly rings with the seat belt connected. Gas low notification light does not come on until on empty. No heated seats. I think the ecm needs to be reset. Sun roof goes up but not slides open. Passenger side door won't open. Automatic car starter doesn't work. 2 years ago, my son in law, started this car in below zero temp and it started on fire. He put it out and restarted it and it was ok. Something makes noise occasionally for no apparent reason.