2009 Cadillac STS Engine Problems
- Complaints
- 2about this part
- Share
- 13%of 15 total for the year
- Median mileage
- 140,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the engine of the 2009 Cadillac STS, 13% of the 15 complaints for this model year. Where a mileage was given, the median is 140,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The known timing chain issue GM done a warranty for to fix it but won’t fix it now. My car is running sluggish because of it and had numerous times that it wouldn’t go up to the speed limit almost caused accidents because of it and I’m afraid to even drive it anymore knowing that it’s a time bomb waiting to happen that could blow up on the highway that can cause accidents.”
NHTSA complaint #11732370, filed 2026-04Related service bulletins
- 11009531Sep 27, 2024This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
- 11007116Aug 6, 2024This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
- 11007091Aug 5, 2024This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
- 11004761Jun 28, 2024This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or…
- 11000119Apr 26, 2024This service bulletin provides technicians with information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
- 10242298Aug 10, 2023This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308…
- 10211658May 2, 2022This service bulletin provides policy information on warranty administration guidelines for multiple repairs with independent causes (GM Canada Dealers Only).
- 10205052Aug 20, 2021This service bulletin provides diagnostic aid information/procedures to perform inspections to determine if the engine needs to be replaced as opposed to just internal parts for…
- 10199244May 24, 2021This service bulletin provides diagnostic aid procedure to perform inspections to determine if the engine needs to be replaced as opposed to just internal parts for knocking…
- 10199238May 3, 2021This service bulletin provides information on the cold start control system in DI engines to reduce cold start emissions and improve fuel economy.
Engine: other model years
Other parts of the 2009 Cadillac STS
5 complaintsElectronic stability control
4 complaintsBrakes
3 complaintsSteering
3 complaintsElectrical system
1 complaintsEquipment
1 complaintsExterior lighting
1 complaintsOther or unknown
1 complaintsTransmission and drivetrain
1 complaintsVehicle speed control
1 complaintsWheels
1 complaints
← All problems reported for the 2009 Cadillac STS
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology