AI Damage2005 Cadillac STS: common problems
Owners of the 2005 Cadillac STS filed 101 complaints with NHTSA, most often about electrical system and powertrain. Details by component below, with sources.
Key figures
- Owner complaints
- 101
- involving a crash
- 13
What fails most often
- 1 Electrical system 23% of all complaints
- 2 Powertrain 18% of all complaints
- 3 Engine 12% of all complaints
- 4 Air bags 11% of all complaints
- 5 Engine and cooling 7% of all complaints
- 6 Service brakes 7% of all complaints
- 7 Seats 6% of all complaints
- 8 Vehicle speed control 6% of all complaints
- Electrical system: 23 complaints (23% of all), 3 of them with a crash reported by the owner.
- Powertrain: 18 complaints (18% of all), 2 of them with a crash reported by the owner.
- Engine: 12 complaints (12% of all).
- Air bags: 11 complaints (11% of all), 2 of them with a crash reported by the owner.
- Engine and cooling: 7 complaints (7% of all), 1 of them with a crash reported by the owner.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 3.6 L · petrol · 6 cyl
- 4.6 L · petrol · 8 cyl
- automatic, 5-speed
Drive: RWD, AWD
Symptoms owners describe
How many of the 101 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 23 | 3 | 0 |
| Powertrain | 18 | 2 | 0 |
| Engine | 12 | 0 | 0 |
| Air bags | 11 | 2 | 0 |
| Engine and cooling | 7 | 1 | 0 |
| Service brakes | 7 | 4 | 0 |
| Seats | 6 | 0 | 0 |
| Vehicle speed control | 6 | 4 | 0 |
| Exterior lighting | 5 | 0 | 0 |
| Fuel/propulsion system | 5 | 0 | 0 |
| Structure | 5 | 0 | 0 |
| Suspension | 5 | 1 | 0 |
| Visibility | 5 | 0 | 0 |
| Steering | 4 | 1 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
New tires failed on black ice. Not have traction for condition of road. Tires designed for summer only. Like snow tires for winter only. Vehicle went into oncoming lane, hit on side, spun. - and car trunk demolished - car still ran. But busted exhaust and catalytic converter. Flat tire, rear door jammed on one side.
On june 9, 2016 I was driving on a wet road so when I tried to stop it took an extreme amount of distance to get the car to stop. I figured the brakes got a little wet causing the probable. The next day my wife was driving the car. Traffic stopped ahead of her stopped so she tried to stop.
As I am driving, the hood ajar light comes on and there is no sign of my hood being ajar. In addition, the transmission seems as thought it is going out as well. Before I consult with an attorney I wanted to first give gmc an opportunity to resolve this issues. My vehicle has less than 100,000 miles.
My air bag did not deploy. I spoke with gmac claims representative and he stated that it was normal for the air bag not to deploy. He also, stated that the air bag indicated that I had applied the accelerator when I know that I did not.
The contact stated that while driving 75 mph, the steering wheel began to shake violently as the front driver's side wheel became detached from the vehicle. As a result, the front driver's side of the vehicle to dropped to the ground and the contact crashed into a cement wall.
Consumer states vehicles was involved in an accident and the airbags did not deploy
Tl* the contact owns a 2005 cadillac sts. During brake application, he experienced unintended vehicle acceleration. As a consequence he crashed into a tree. The vehicle was taken to the dealership, but the technicians could not identify the cause of the failure. The failure mileage was 74,000.
Tl contact owns a 2005 cadillac sts. While driving 15 mph, the sybilla track light illuminated and the rear of the vehicle began sliding to the left. The contact depressed the brake pedal and the light illuminated again. The vehicle struck the guardrail and caused $7,014.75 worth of damage. The contact was injured.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 3,538 of 36,656 model years in the NHTSA data (top 10% most complained about).
On average one model year of the STS has 31 complaints (14 years in the data). This year has 101, above average.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
Other years of this model
Questions and answers
What are the most common problems with the 2005 Cadillac STS?
Owner complaints to NHTSA most often mention: electrical system, powertrain, engine. Total complaints: 101. The most frequent symptoms in complaint texts: warning lights, check engine (12%), smoke, burning smell, fire (7%), airbag warning light (6%).
How many service bulletins (TSB) were issued for the 2005 Cadillac STS?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2005 Cadillac STS from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2005 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.