Two problems related to ignition switch have 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.
2006 Cadillac Sts. Consumer writes in regards to vehicle ignition problem. The consumer stated as he neared the highest elevation of the highway, other vehicles were going about 58-60 mph, and the crest flattened, the speed increased almost automatically, as the resistance deceased. After a few hundred yards, the consumer realized he had no power under his foot, the dash lights went out with no engine condition indicators displaying, the only light on the dash was a lighted "d" indicating the transmission was in drive. Despite the vehicle being in gear, the vehicle was coasting at 70 mph. Upon inspection, the start button and ignition switch failed. A few weeks earlier, the vehicle stalled while at a stop light. He immediately re-stared the vehicle. On a separate occasion, the consumer experienced a lapse of power.
The contact owns a 2006 Cadillac Sts. The contact stated that while driving 72 mph, the vehicle suddenly stalled. The contact engaged the push-to-start button but as soon as pressure was released from the button, the vehicle stalled again. The failure was recurring. The vehicle was taken to the dealer, who replaced the ignition switch. The vehicle was repaired. The failure mileage was 82,100.