There is a known problem with the gas tanks on these vehicles. The vapors cause the check engine light to illuminate. In nys this car will not pass the yearly inspection. Chevrolet has an extended coverage bulletin out but it only is for vehicles that have les than 150,000 miles on it or are not older than 15 years old. Whichever come first. Prior to this, their extended coverage was for 150,000 miles or 12 years. I was excluded from the first time due to age of the vehicle when I purchased it and am now excluded from the second extended coverage due to the mileage. It is absolutely ridiculous that this is not an official recall and that chevy has loopholed numerous owners out of the coverage by not increasing the mileage requirement. The national average to drive a car according to the federal safety agency is between 15,000 and 16,000 per year. According to their mileage requires a person would have had to drive this car less that 10,000 per year. This is totally unrealistic. Since this safety issue involves fuel which is highly flammable I am baffled as to why the federal safety agency is not forcing an official; recall on this vehicle or forcing chevy to take the mileage restriction/age off of the extended coverage.
The worst 2003 Chevrolet Trailblazer EXT 370 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Electrical6
- Fuel system3
- Engine2
- Lights2
- Visibility2
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Electrical6
- Fuel system3
- Engine2
- Lights2
- Visibility2
- Body1
- Driver assistance1
- Tires1
- Wheels1
Recalls
No recalls on record for this model year.
Defect investigations
Fuel pump module leaks gasoline
During the course of this ea investigation, odi observed that the majority of the complaints (88%) and warranty claims (94%) were reported for vehicles that are registered for use in the salt belt region of the us.this area includes 20 states in the northeast, mid atlantic and the midwest regions and the district of columbia.consumers in the salt belt region reported to odi that they could smell fuel vapors in their vehicles while driving.upon further examination of their vehicles, they discovered that fuel vapors were coming out of the top of the fuel tank. This condition is caused by corrosion of the return and sender lines of the fuel pump module.water and road salt collect on top of the fuel pump leading to small pinholes appearing on the fuel lines.fuel may leak and collect on top of the module and/or spill onto the ground.the data evaluated under this investigation reflect a relatively low frequency of occurrence that largely arises in salt belt states.gm has extended the warranty on the subject component to ten years or 120,000 miles.further use of agency resources does not appear to be warranted at this time; accordingly, this investigation is closed.the closing of this investigation does not constitute a finding by the federal safety agency that no safety-related defect exists.the agency reserves the right to take further action if warranted by the circumstances.for additional information select document search.
EA07009
Fuel tank leak
In june 2007, gm will expand its special policy to address fuel tank inlet check valve (icv) fractures on certain model year (my) trailblazer ext and gmc envoy xl vehicles.the expanded policy covers my 2002-2004 trailblazer ext, gmc envoy xl, and gmc envoy xuv vehicles and will extend for a period of 10 years or 150,000 miles (whichever comes first).gm will provide free repair of the fuel tank. It is sending letters to owners beginning in june of 2007.this action supersedes gm's previous 7 year/70,000 mile special policy for my 2002 trailblazer ext and envoy xl vehicles.the condition is most often reported as illumination of the service engine soon (ses) light.the vehicle's diagnostic system detects the presence of a fuel system pressure leak and illuminates the ses light.other owners report smelling gasoline fumes. The action taken by the manufacturer is sufficient to resolve the issues raised by this investigation.the closing of this investigation does not constitute a finding by the federal safety agency that no safety-related defect exists.the agency reserves the right to take further action if warranted by the circumstances.
PE07014
Fuel pump module leaks gasoline
Odi has received reports that the fuel pump module leaks fuel and or vapor underneath the vehicle.gm states, the failure mechanism is corrosion of the fuel pump module flange which may lead to a fuel leak.corrosion of the fuel pump module flange is the result of the vehicle operating in a corrosive environment.odi has upgraded this pe to engineering analysis (ea07-009) to further assess this issue.
PE07013
Technical service bulletins for the 2003 Chevrolet Trailblazer EXT 370 76
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
- Unknown or other
- Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles
- GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities
- This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves...
- This bulletin provides information for use on a Product Assistance Claim (PAC), which is formerly known as...
- This service bulletin provides information for dealers/technicians on Service Programming System (SPS)...
- This Warranty Administration bulletin provides retail and wholesale service personnel with the...
- This bulletin provides information for electrical ground repairs using new General Motors replacement...
- This bulletin advises the technician of possible location of an internal coolant leak from a specific...
See all 76 bulletins for the 2003 Chevrolet Trailblazer EXT 370
What 2003 Chevrolet Trailblazer EXT 370 owners say
Most recent owner complaints, unedited.
2003 chevrolet trailblazer 370 rear passenger side door electrical window control switch would not completely close window . Smelled like electrical wire burning. Had vehicle stop at time and had assistance in removing door interior panel and found electrical window switch completely melted and wire connection burned . Personal vehicle used on vacation, stopped just off highway at time .
Tl* the contact owns a 2003 chevrolet trailblazer ext 370. While driving at various speeds, there was an abnormal odor of fuel coming from the vehicle. The failure recurred continuously. The contact observed fuel dripping from the rear driver side of the vehicle. The vehicle was taken to the dealer where it was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 21,000.
Tl* the contact owns a 2003 chevrolet trailblazer ext 370. The contact stated that while driving at various speeds, the vehicle surged forward and the rpms fluctuated without warning. In addition, the contact stated that an abnormal fuel odor emitted from the vehicle as the check fuel warning light illuminated. The vehicle was taken to the dealer where it was diagnosed that the fuel tank vacuum and fuel tank needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 150,000.
My wife was driving the SUV at highway speed when the front windshield wipers ceased to function during a heavy thunderstorm. She had to pull over because her visibility was obstructed to the point of not being able to operate the vehicle safely.
Tl* the contact owns a 2003 chevrolet trailblazer ext 370. While driving various speeds, the hatch door ajar light illuminated and failed to latch without warning. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The approximate failure mileage was 100,000.
Vehicle started leaving spots of oil on the ground over night. Was driving to work on wednesday and a bluish cloud of smoke was trailing behind me. Arrived at work and let truck cool down after which I crawled underneath and with a mirror was able to locate the leaking rear main seal. This is a common problem with gm,s 5.3 liter engines. Multiple forums are posting many people complaining of the same issue. Gm needs to stand behind there products and repair this issue which again is a wide spread known problem.
After a long day of work, I returned to my parked vehicle to discover a totally flat front right tire, on closer examination it was noted that the tire had split on the outside seam. It was noted that the same condition of the tire splitting was visible on all three of the other tires on the vehicle. Flat tire was replaced with spare tire that had never been used. I returned the vehicle to the place that I had purchased the tires; the tech at the store examined the tires and declared that all four tires were manufactured from the same batch of tires manufactured by goodyear. And that all four were defected. Today I contacted goodyear and took my vehicle to their location. The man at goodyear stated that goodyear has never had a recall nor defective tires. That he would have to contact goodyear when they opened on the east coast. My complaint is with goodyear. And the validity of the goodyear tech stating that goodyear has never had a defective tire or recall on their tires.
Tl*the contact owns a 2003 chevrolet trailblazer ext 370. The contact stated that the windows failed to roll up or down. Also, the contact mentioned that the heated seat would not turn off. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was 140,000.
Tl* the contact owns a 2003 chevrolet trailblazer ext 370. The contact stated that the turn signals do not function properly and the hazard lights illuminated instead of the turn signals. The contact was able to press the button for the hazard lights when needed, but not the turn signals. The vehicle was not diagnosed. The failure continued and caused the front headlight assembly and the rear headlight assembly to short and dim with no warning. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 150,000.
Compare the 2003 Chevrolet Trailblazer EXT 370
Other model years
Questions about the 2003 Chevrolet Trailblazer EXT 370
Is the 2003 Chevrolet Trailblazer EXT 370 reliable?
Owners have filed 14 complaints about the 2003 Chevrolet Trailblazer EXT 370, close to a typical Trailblazer EXT 370 model year.
What is the 2003 Chevrolet Trailblazer EXT 370 year score?
The 2003 Chevrolet Trailblazer EXT 370 scores 76 out of 100 (average). The score compares it with the other model years of the Chevrolet Trailblazer EXT 370: 75 is a typical year, 50 means twice the usual complaints, and serious complaints and recalls lower it.
What is the most common problem with the 2003 Chevrolet Trailblazer EXT 370?
Electrical system, with 6 complaints, typically around 140,000 miles. Next is fuel system (3).
How many recalls does the 2003 Chevrolet Trailblazer EXT 370 have?
No recalls on record.
VIN decoder
See the problems and recalls for an exact car
Buying a used 2003 Chevrolet Trailblazer EXT 370?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history