2005 Cadillac STS Engine cooling Problems
- Complaints
- 7about this part
- Share
- 7%of 101 total for the year
- Median mileage
- 40,898miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 7 complaints about the engine cooling of the 2005 Cadillac STS, 7% of the 101 complaints for this model year. Where a mileage was given, the median is 40,898 miles. 1 of these say a crash was involved, according to the filers.
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.
“I own a 2005 Cadillac STS. I notice a loud rattling noise followed by sluggish and stalling engine while in the midst of driving. I took the car to the dealership and told me there was a problem with my timing chain. While at the dealership at least 3 other cars of the same type complained of the same problem. This is not safe while the consumer is driving and the car begins to stall at 55 or 60 MPH. This repair costs over $3100.00.”
NHTSA complaint #10339717, filed 2010-06, 81,000 miles“There was no previous indicator of a trouble condition--first indication of trouble was mis-firing---long story short---a complete engine over haul (rings, bearings etc.) was made aware that these cars normally use 1 qt oil per 2000 miles---there is no warning for low oil level on the dash or dic other than remaining oil life, which was ok--an extended warranty covered the repairs the car had between 68k-69k miles and had been maintained as required by the dealership----”
NHTSA complaint #10382538, filed 2011-02, 69,000 miles“The car has had several documented electrical and mechanical failures. Over the past 2 years the car has been shutting down automatically in the middle of traffic. The display shows 'engine power reduced' and is followed by other messages like 'service anti-lock brake sys' or 'service radar' or service stability sys and traction control.' before the car shuts down the traction control is automatically disabled. I have had to bring the car in for the same symptom 4 different times. …”
NHTSA complaint #10378184, filed 2011-01, 40,898 miles“- the contact was driving when she lost consciousness for about 30 seconds. The contact believed that loss of consciousness was due to fumes in the passenger compartment. At the time of the incident the vehicle was traveling at 40 MPH under dry conditions. As a result the contact's vehicle crashed into another vehicle. The contact stated that she was unaware that she was in a crash, and that the air bags deployed. She regained consciousness because of the gases caused by the air bag's deployment. …”
NHTSA complaint #10177649, filed 2007-01, 14,895 miles“Dt: purchased a new vehicle that had an odd smell, but soon became overpowered with its strong odor. Consumer's wife eyes watered from the smell and her throat burned. Took vehicle to dealer for who tried to remedy the problem by placing odor eaters inside of the trunk from where the smell was strongest. The odor was stronger when vehicle was outside in heat or hot weather. Consumer was concerned that this may be toxic. The problem was ongoing. Contacted GM , but they did not answer the concerns. Vehicle continued to smell of odors. …”
NHTSA complaint #10126737, filed 2005-08, 200 milesRelated service bulletins
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- 10250775Feb 22, 2024This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large…
- 10250347Feb 2, 2024This Warranty Admin service bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and…
- 10249579Jan 12, 2024This PI bulletin advises the technician on the proper way to install the pistons in an engine.
- 10245395Nov 6, 2023This service bulletin provides a vibration analysis worksheet the technician can use in conjunction with the appropriate Vibration Analysis-Road testing procedure when diagnosing…
- 10244273Oct 6, 2023This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
- 10242843Sep 1, 2023The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the…
- 10242262Aug 24, 2023This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and…
- 10239101Jun 30, 2023This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
- 10236164Apr 24, 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…
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2008 | 2 | 4% |
| 2007 | 1 | 2% |
| 2006 | 8 | 6% |
| 2005 | 7 | 7% |
| 2004 | 1 | 14% |
| 2003 | 3 | 38% |
| 2002 | 1 | 14% |
| 2001 | 1 | 8% |
| 2000 | 2 | 17% |
| 1999 | 6 | 46% |
Other parts of the 2005 Cadillac STS
23 complaintsTransmission and drivetrain
18 complaintsEngine
12 complaintsAir bags
11 complaintsFuel system
8 complaintsBrakes
7 complaintsOther or unknown
6 complaintsSeats
6 complaintsVehicle speed control
6 complaintsExterior lighting
5 complaintsBody and structure
5 complaintsSuspension
5 complaints
← All problems reported for the 2005 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