Three problems related to other fuel system tank assembly 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.
Leaks fuel if you fill the tank to capacity. This was an earlier recall, exact same thing happening again.
The fuel delivery system has been failing in the same manner that I have seen many other Cadillac owners have gotten repaired through a recall already in place. Every single time I put gas in the tank the car refuses to turn on with the first attempt. The only way to get the car to turn on is after multiple attempts and finally enough fuel gets delivered to the system. Similarly, the car will hesitate or feel like no gas is being delivered to the engine while driving on the highway. Often, it will cause a dramatic drop in speed causing a dangerous situation. Gm definitely needs to take this into consideration because it is faults equipment rather than wear and tear. Also, there seems to be a some major issue with the oil system in the car. One week after a synthetic oil change, there is over 1 quart of oil missing in the reserve. There has been over 4 quarts missing at a time.
After purchasing a used 2006 Sts awd from Cadillac NJ in December 2009, wife noticed while making right hand turns on smooth pavement, car seems to stall temporarily not allowing me to accelerate for a few seconds and message traction active is displayed. January 18, 2010,I brought the car back to dealership to complain. They said prob bad gas in lines. Put new gas in and gas treatment for water in tank. Did that, didn't help. February 1, 2010 I returned to dealership to complain it was still doing it on occasion. I asked if there were any complaints on this vehicle. Got a no response. May 2010 brought car back to dealership to complain. By this time my wife has refused to drive it for safety reasons (people think she is letting them into oncoming traffic when car slows down). Looked on internet and found other complaints. I was told gm engineering is aware of issue and are working on solution. Made complaint to gm in sept 2010 was told software update will be ready in 2 months. After getting dodged for 2 1/2 more years, made second complaint to gm April 2012. Gm executive stated I can use a rental due to the seriousness of the condition losing power while driving. They said it was fixed. A week later it started again. Gm executive and service manager of Cadillac called to say that the car was designed that way. There is no fix on it. I told them the 2011 Sts rental I drove did not have any problem losing power while in a turn. They said it is a different system. I said "so there was a problem with the old system" . I was let out of the door with an offer from gm exec's, $4,500 off price of a new car at their dealership. I asked, what about safety? I told them I own a car that my wife refuses to drive due to loss of power. I only drive car because my wife drives my truck. Gm knows of this safety issue. Service said problems on 2006-07 Sts's. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).
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| Other Fuel System Tank Assembly problems | |
| Other Fuel System Pump problems | |
| Other Fuel System Fuel Gauge problems |