Which parts fail
Components named in complaints (fuel pump, injectors, fuel tank, hybrid and EV propulsion).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2006 Cadillac STS owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2006 Cadillac STS. The contact stated while inspecting the vehicle, he noticed fuel dripping from the fuel tank. The contact stated no warning light was illuminated. The vehicle was not taken to a dealer. Upon investigation, the contact associated the failure with NHTSA Campaign Number: 14V542000 (Fuel System, Gasoline) however, the VIN was not included. The manufacturer was not informed of the failure. The failure mileage was approximately 140,000.
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.
4/14 - car was shutting off intermittently, pulled over in hotel parking lot and a gentlemen came up to car to tell me that it was smoking, got out and there was a fire at the rear of the car. Ran into hotel and got fire extinguisher to put it out, had towed to repair shop. There determined that the terminal on the top of the fuel pump over heated and melted a hole in the top of the pump, causing fuel to leak out and catch fire -$6000 worth of damage, only used parts available to fix car. 8/14 recall was released about fuel module and harness. 6/15 - called dealer about unrelated issue (door lock), VIN# was ran and was told parts were available to fix recall. I mentioned I did not receive the letter that parts were available and was told dealer had to order them, 4 days later parts came in and work was scheduled. Car was there for 10 days "having trouble getting parts". …
This complaint pertains to GM recall #14405-2. Also listed under the national highway traffic safety administration campaign id number of 14V542. Here is my issue: when a manufacturer, in this case Cadillac, issues a recall that is an inconvenience to their customers, why doesn't the government require them to give a loaner car and/or additional compensation to the vehicle owner to cover the cost and hassle of taking off work and getting a rental car to use? I asked the dealership, the Cadillac customer service line representative, ahmed, and the Cadillac customer service supervisor, michelle for a loaner car and the request was denied. I think that as part of the cost of recalls the manufacturer should limit the customer's inconvenience to an absolute minimum. Please consider requiring manufacturers to provide a loaner car when a recall is issued in the future. …
Driving out of town stop got gas everything fine 20 min from then I pull over the side of road turn car get something out the trunk back in the car turn fuel gauge reads almost empty now I'm way out in the middle of nowhere.did get any warning etc but now I don't know if I've gas it's reading empty.so had to cut the trip turn around to drive all back which was the six-hour drive I've to spend over $200 gas in the fear of not running finally gets in the shop work on decide to take another road trip and I cant believe this does it again now its back in shop.
Tl* the contact owns a 2006 Cadillac STS. The contact stated that there was fuel leaking without warning. The contact stated that NHTSA campaign number: 14V542000 (fuel/propulsion system) exceeded a reasonable amount of time for the recall repair. The manufacturer confirmed that the part was not available. The dealer informed the contact that the part might become available in June of 2015. The approximate failure mileage was 103,000.
Tl* the contact owns a 2006 Cadillac STS. While driving at 60 MPH, the engine stalled. The vehicle was taken to an independent mechanic who diagnosed that the fuel pump wiring needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 70,000.
Certain times while driving, the traction assist comes on, and all power is lost to the engine. Lights are still on, car is still on, but gas does not accelerate and car is hard to steer. I have had to pull over 6 times in the last few months, turn the car off, restart and hope it does not happen 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.
Tl* the contact owns 2006 Cadillac STS. The contact received a recall notice for NHTSA campaign number: 14V542000 (fuel system, gasoline) and stated that the parts were unavailable. The dealer was uncertain when the parts would become available to service the vehicle under the recall. The manufacturer was notified of the issue and stated that they were also uncertain when the parts would become available. The contact had not experienced a failure. Updated 8/27/15 the consumer stated the check engine light illuminated. Updated 09/08/15
Related recalls
Fuel system, gasoline › Delivery › Fuel pump
General Motors LLC (GM) is recalling certain model year 2004-2007 Cadillac CTS-V vehicles manufactured October 6, 2003, to March 15, 2007, and 2006-2007 Cadillac STS-V vehicles manufactured June 23, 2005, to March 15, 2007.
Remedy: GM will notify owners, and dealers will replace the fuel module and fuel tank jumper harness, free of charge. GM sent out interim notices in late October. The recall began on March 12, 2015.
Fuel system, gasoline › Delivery
Certain vehicles equipped with v6 engines May have a condition where fuel is no longer supplied to the engine. This condition occurs without the illumination of the fuel level low indicator light or the warning chime.
Remedy: Dealers will reprogram the electronic control module (ECM) with new software free of charge. Owners were notified in December 2005 and asked to maintain at least 1/4 of a tank fuel level to avoid this condition until…
Fuel System complaints in other STS years
Frequently asked questions
How common are fuel system problems on the 2006 Cadillac STS?
NHTSA has 20 complaints about the fuel & propulsion system of the 2006 Cadillac STS, 14% of the model year's 139 complaints. The component named most often is storage › tank assembly (1 mentions).
Is there a recall for 2006 Cadillac STS fuel system problems?
Yes — NHTSA recall 14V-542 (fuel pump, Sep 9, 2014); NHTSA recall 06V-020 (delivery, Jan 25, 2006). Recall repairs are free at authorized dealers.
At what mileage do 2006 Cadillac STS fuel system problems start?
Half of the complaints with a recorded mileage happened before about 82,000 miles.
Is it dangerous?
Owners linked 0 crashes, 3 fires and 0 injuries to fuel & propulsion system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.