2003 Chevrolet Trailblazer Engine cooling Problems
- Complaints
- 65about this part
- Share
- 7%of 901 total for the year
- Median mileage
- 49,890miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 65 complaints about the engine cooling of the 2003 Chevrolet Trailblazer, 7% of the 901 complaints for this model year. Where a mileage was given, the median is 49,890 miles. 1 of these say a crash was involved and 1 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“2nd time replacing clutch fan 68,000 miles check engine light comes on. Loud noise from engine. Eventually goes into reduced power mode max 10mph . My check engine light is on again and it is making that loud whirring noise again. I am expecting a third failure soon. This should be recalled.”
NHTSA complaint #10291215, filed 2009-11, 20,000 miles“While driving from work I stopped at a red light and the trailblazers RPM dropped down and the truck shut off in traffic. But all the lights were on. I had to restart the truck and it crank up. Three weeks later I was pulling up to a gas station and pressed on the brakes to stop and the truck cut off (same experience). Yesterday I was driving in 5 o'clock traffic and pressed on the brakes and it shut off again.”
NHTSA complaint #10266362, filed 2009-04, 107,034 miles“The engine fan clutch failed on my 2003 chevy Trailblazer the truck is only three years old with 65000 miles on it. I was told that GM has change this part several times to try to fix the problem I think there should be a recall on this part as the cost was about $630 dollars to have it repaired.”
NHTSA complaint #10178066, filed 2007-01, 64,900 miles“My chevy Trailblazer has a loud sound when driving or idling. Its sounds like a dump truck. Have taken it to a mechanic and they have said that it is the fan clutch. I then had the fan clutch replaced and the sound continues.”
NHTSA complaint #10227828, filed 2008-05, 93,000 miles“For approx. 2 years there had been a constant ticking when my 2003 Chevrolet Trailblazer was running. Questions about the noise was dismissed by the service technicians as normal. Finally on 3/22/08 my fan clutch failed causing an overheat problem and a constant loud noise, along with a service engine light. Upon investigating this issue I found literally thousands of complaints on the internet regarding the Chevrolet Trailblazer and its premature fan clutch failures. To correct the failure I had to incur the $724.00 repair.”
NHTSA complaint #10222193, filed 2008-03, 70,804 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 |
|---|---|---|
| 2023 | 4 | 5% |
| 2022 | 2 | 2% |
| 2021 | 2 | 1% |
| 2008 | 12 | 6% |
| 2007 | 12 | 2% |
| 2006 | 24 | 2% |
| 2005 | 44 | 3% |
| 2004 | 39 | 4% |
| 2003 | 65 | 7% |
| 2002 | 143 | 12% |
| 2001 | 5 | 25% |
| 2000 | 2 | 8% |
Other parts of the 2003 Chevrolet Trailblazer
285 complaintsFuel system
180 complaintsTransmission and drivetrain
103 complaintsExterior lighting
77 complaintsVisibility (wipers, defrost, mirrors)
70 complaintsAir bags
57 complaintsBody and structure
43 complaintsBrakes
36 complaintsSuspension
33 complaintsEquipment
26 complaintsSteering
26 complaintsVehicle speed control
25 complaints
← All problems reported for the 2003 Chevrolet Trailblazer
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