2003 Chevrolet Blazer Engine cooling Problems
- Complaints
- 6about this part
- Share
- 8%of 77 total for the year
- Median mileage
- 40,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 6 complaints about the engine cooling of the 2003 Chevrolet Blazer, 8% of the 77 complaints for this model year. Where a mileage was given, the median is 40,000 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.
“I was out late in a desolate area-no houses-no stores. I smelled burning rubber so bad I thought the car was on fire. I had no alternative but to continue driving. I was terrified, I am a senior citizen-female alone. I refused to drive it anywhere once it was parked. My mechanic was kind enough to pick it up. The dealer would not. It was the intake manifold. The car only has 44,000 miles on it. It cost me $466.26. I was truly terrified.”
NHTSA complaint #10253199, filed 2008-12, 44,000 miles“Chevrolet Blazer would rev up and after a year began to run a little hotter than it should for no reason. I had it checked many times. A few months ago I was told it was a bad sensor. Was this a defect from the very beginning. It does not rev up now. Has anyone else had this problem.”
NHTSA complaint #10150631, filed 2006-02, 94,000 miles“Vehicle stalled while driving, but will restart when key was turned in the ignition. Vehicle was serviced 5 times in which a diagnostic test was performed, no failure code found. Then, dealership removed the automatic starter system, and the vehicle only stalled once. A year later, the service engine light came on while driving. Dealership replaced the computer chip, but the light came back on.”
NHTSA complaint #10115414, filed 2005-03, 300 miles“- the contact owns a 2003 Chevrolet Blazer. The contact purchased the vehicle on 01/13/07. The clear coat was peeling off the vehicle on the driver's side door, and that the vehicle has been in an accident, and that the headlight on the drivers side was coming off, and the front bumper brace on the passengers side was missing. The contact stated that the dealer added a mechanical service contract without his knowledge. The dealer misrepresented the vehicle. That he was told the vehicle would be inspected, and he didn't know parts were missing. …”
NHTSA complaint #10180981, filed 2007-01, 72,654 miles“The contact owns a 2003 Chevrolet Blazer. Everytime the contact opens the door of the vehicle, the interior lights consistently flicker on and off, especially in cold weather. As a consequence, the battery and alternator continue to fail and need replacing. The dealer stated that the failures were a normal characteristic of the vehicle and no remedy was available. Secondly, he noticed that the fuel gauges were inoperative. When the fuel gauge dial indicates that the fuel level is at half a tank, the fuel warning light illuminates. …”
NHTSA complaint #10229957, filed 2008-06, 36,000 milesRelated service bulletins
- 10251887Mar 14, 2024This bulletin advises the technician of possible location of an internal coolant leak from a specific cylinder head and location.
- 10251890Mar 13, 2024This technical 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…
- 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…
- 10249579Jan 12, 2024This PI bulletin advises the technician on the proper way to install the pistons in an engine.
- 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…
- 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…
- 10235802Apr 24, 2023This diagnostic tip bulletin provides additional information on how to diagnose a possible valve, lifter or camshaft issue.
- 10234141Mar 23, 2023This diagnostic tip bulletin provides additional information on how to diagnose a possible valve, lifter or camshaft issue.
- 10234110Mar 17, 2023This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2024 | 2 | 4% |
| 2023 | 2 | 5% |
| 2022 | 1 | 2% |
| 2021 | 3 | 2% |
| 2020 | 3 | 1% |
| 2019 | 1 | 1% |
| 2008 | 1 | 20% |
| 2005 | 1 | 7% |
| 2004 | 4 | 8% |
| 2003 | 6 | 8% |
| 2002 | 20 | 8% |
| 2001 | 23 | 7% |
| 2000 | 63 | 11% |
| 1999 | 62 | 14% |
| 1998 | 64 | 9% |
| 1997 | 93 | 12% |
| 1996 | 149 | 13% |
| 1995 | 213 | 17% |
| 1994 | 42 | 7% |
| 1993 | 51 | 10% |
| 1992 | 9 | 3% |
| 1991 | 12 | 5% |
| 1990 | 5 | 16% |
| 1989 | 4 | 11% |
| 1988 | 7 | 18% |
| 1987 | 2 | 7% |
| 1986 | 5 | 26% |
| 1985 | 5 | 17% |
| 1984 | 1 | 11% |
Other parts of the 2003 Chevrolet Blazer
14 complaintsBody and structure
12 complaintsTransmission and drivetrain
12 complaintsFuel system
10 complaintsElectrical system
9 complaintsBrakes
8 complaintsExterior lighting
4 complaintsSuspension
4 complaintsVisibility (wipers, defrost, mirrors)
4 complaintsSteering
3 complaintsEquipment
2 complaintsInterior lighting
2 complaints
← All problems reported for the 2003 Chevrolet Blazer
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