2003 Chevrolet Blazer: what breaks, and at what mileage
What breaks on the 2003 Chevrolet Blazer
On the 2003 Chevrolet Blazer, the failure owners report most often is fuel gauge or level sensor failure, and the reports cluster around 35,000 miles. Across every failure mode on this year, half the dated reports were filed before 45,000 miles. Overall it scores 66 out of 100, high risk for a 2003.
High risk for a 2003 — 226th riskiest of the 330 2003 vehicles we can rate. 103 owner reports; fleet size estimated from this year's own recall paperwork.
What breaks on the 2003 Chevrolet Blazer
Owners have reported 29 named failure modes on the 2003 Chevrolet Blazer, and the three most-reported carry 31% of everything filed, which is an unusually even spread for one model year.
Fuel gauge or level sensor failure leads with 14 reports, about 0.9 per 1,000 vehicles and with the middle half of reports between 30k to 35,000 miles.
Airbag failed to deploy in a crash follows with 9 reports, median 175,000 miles.
Other body or interior problem follows with 9 reports, median 30,000 miles.
By system, the reports fall mostly into fuel (18), body (15) and airbag (9).
At what mileage it happens
68 of the reports on the 2003 Chevrolet Blazer came with an odometer reading, and half of those were filed before 45,000 miles.
Cumulatively, 57% by 50,000 miles, 76% by 100,000 miles and 84% by 150,000 miles of the dated reports had been filed, with 2 filed above the top of the chart.
The busiest stretch is between 30,000 and 40,000 miles, which alone holds 16% of the dated reports.
35% of the dated reports were filed below 36,000 miles, which is early enough that a fair number of these cars were still under a factory warranty when the owner complained.
Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens
Showing the 12 most-reported failure modes of 29. The full list is in the table below.
How reports accumulate
Every report with an odometer reading, cumulative, from 0 to 200,000 miles. A further 2 reports came in above that, which is why the line stops short of the top. A curve that climbs early is a car with early problems, whatever its total.
- Line share of reports filed by that mileage
- Dashed the median reported mileage
Severity, and what it costs
Across the named modes, 15 mention a crash and 1 an injury. Those are the words owners used in their own complaints, and NHTSA does not verify them, but they are the closest thing in this data to a measure of what a failure actually did.
The average severity weight across every report on this year is 4.22, where a stalled engine or a failed airbag weighs many times more than a rattling trim panel, and a figure this high means the reports are dominated by failures with safety consequences rather than annoyances. The weighting is set out in full on the methodology page.
What the top failures cost to put right, as editorial estimates for an independent US shop rather than figures from NHTSA: fuel gauge or level sensor failure at $300–$1,200, airbag failed to deploy in a crash at $1,000–$5,000, other body or interior problem at $200–$2,000 and other lighting problem at $120–$1,200. Dealer labour, a seized bolt or a part that is no longer made can push any of these past the top of its range.
16% of the reports on this year sit in the engine, transmission, drivetrain or cooling systems — the four where a repair bill is usually four figures.
Every reported failure mode
| Failure mode | System | Reports | With reading | 25th | Median | 75th | Per 1,000 | Typical repair | Severity |
|---|---|---|---|---|---|---|---|---|---|
| Fuel gauge or level sensor failure | fuel | 14 | 14 | 30k | 36k | 36k | 0.9 | $300–$1,200 | Moderate |
| Airbag failed to deploy in a crash | airbag | 9 | 5 | — | 175k | — | 0.6 | $1,000–$5,000 | Critical |
| Other body or interior problem | body | 9 | 4 | — | 32k | — | 0.6 | $200–$2,000 | Moderate |
| Other lighting problem | lighting | 6 | 4 | — | 156k | — | 0.4 | $120–$1,200 | Moderate |
| Differential or transfer case failure | drivetrain | 5 | 1 | — | 194k | — | 0.3 | $900–$4,200 | High |
| Other powertrain problem | transmission | 5 | 4 | — | 29k | — | 0.3 | $400–$4,500 | High |
| Other electrical problem | electrical | 5 | 4 | — | 76k | — | 0.3 | $250–$2,000 | Moderate |
| ABS module or sensor failure | brakes | 4 | 0 | — | — | — | 0.3 | $500–$2,400 | High |
| Stalling while driving | engine | 3 | 3 | — | 300 | — | 0.2 | $300–$2,500 | Critical |
| Fuel pump failure | fuel | 3 | 2 | — | 176k | — | 0.2 | $600–$2,600 | High |
| Cruise control failure | adas | 3 | 1 | — | 21k | — | 0.2 | $200–$1,400 | High |
| Tail light, brake light or signal failure | lighting | 3 | 3 | — | 44k | — | 0.2 | $100–$900 | Moderate |
| Other engine problem | engine | 3 | 3 | — | 44k | — | 0.2 | $300–$4,000 | High |
| Other suspension problem | suspension | 3 | 1 | — | 20k | — | 0.2 | $350–$2,000 | Moderate |
| Ignition switch, key fob or immobilizer failure | electrical | 2 | 2 | — | 27k | — | 0.1 | $250–$1,500 | High |
| Loss of braking | brakes | 2 | 0 | — | — | — | 0.1 | $400–$3,000 | Critical |
| Liftgate, tailgate or trunk failure | body | 2 | 1 | — | 250 | — | 0.1 | $250–$1,500 | Moderate |
| Other brake problem | brakes | 2 | 1 | — | 30k | — | 0.1 | $300–$1,800 | High |
| Other steering problem | steering | 2 | 2 | — | 35k | — | 0.1 | $350–$2,400 | High |
| Parking brake failure | brakes | 1 | 1 | — | 55k | — | 0.1 | $250–$1,300 | Moderate |
| Control arm, ball joint or bushing failure | suspension | 1 | 1 | — | 10k | — | 0.1 | $400–$2,200 | High |
| Paint peeling or clear coat failure | body | 1 | 1 | — | 73k | — | 0.1 | $600–$6,000 | Low |
| Rust or structural corrosion | body | 1 | 1 | — | 110k | — | 0.1 | $500–$6,000 | High |
| Door latch or handle failure | body | 1 | 0 | — | — | — | 0.1 | $250–$1,200 | High |
| Sunroof failure or glass breakage | body | 1 | 1 | — | 15k | — | 0.1 | $700–$4,500 | High |
| Windshield cracking | glass | 1 | 1 | — | 44k | — | 0.1 | $300–$1,600 | Moderate |
| Wiper or washer failure | glass | 1 | 1 | — | 110k | — | 0.1 | $120–$800 | Moderate |
| Other fuel system problem | fuel | 1 | 0 | — | — | — | 0.1 | $300–$2,200 | High |
| Other visibility problem | glass | 1 | 1 | — | 250 | — | 0.1 | $150–$1,400 | Moderate |
| Unclassified problem | other | 8 | 5 | — | 85k | — | 0.5 | — | Moderate |
Rate per 1,000 uses a fleet-size estimate derived from recall paperwork for this exact model year. It is a lower bound. Repair costs are typical independent-shop ranges for the failure, not figures from these reports.
How often, against how many were built
Scaled by an estimate of how many of these cars exist, the 2003 Chevrolet Blazer draws about 6.7 per 1,000 vehicles, which puts it in the 84th percentile of complaint rates among 2003 vehicles we can rate.
That denominator is the weakest number on the page and it is fair to say so plainly. Rate per 1,000 uses a fleet-size estimate derived from recall paperwork for this exact model year. It is a lower bound.
The working figure is 15,326 vehicles. If the true number is twice that, every rate on this page is half what it says; the ranking against other 2003 vehicles, which is what the risk score uses, is far more robust than the rate itself.
What owners wrote
Verbatim from NHTSA complaint narratives, trimmed for length. The odometer reading is the one the owner gave.
Fuel gauge or level sensor failure
As the owner of a 2000 chevrolet blazer, coup (VIN: [xxx]) I was looking forward to continue purchasing chevrolet vehicles in the future. However, a recent experience has made me hesitant in this regard. *ak when I recently noticed that my gas gauge was giving questionable readings and I had no idea as to the amount of fuel still remaining in the tank I took the vehicle to the mechanics at selman chevrolet in orange. It was, indeed, determined that the fuel gauge sensor was not functioning correctly, but much to my chagrin I learned that it is not covered under warranty. This includes the extended warranty that I purchased from glendale nissan (member # [xxx]) obviously I was surprised that an item so vital to safety is not covered. I can understand if it were an item requiring replacement after so many miles, but that is obviously not the case. I drive in heavy freeway traffic every day, many times with my 4 year-old daughter, and should I run out of gas the results would be disastrous if not deadly. In such a case who would be responsible if the vehicle ran out of gas due to a faulty reading of the gauge? Are you aware that this…
Consumer had experienced loud thumping from the engine compartment. There were times when transmission got stuck in one gear for an extended amount of time. Vehicle was taken to the dealer four times for transmission problems. Also, fuel gauge was not functioning properly. When gas was in the tank it could register full one minute and half full the next minute without moving the vehicle. Manufacturer and the dealer had been notified.*ak
Airbag failed to deploy in a crash
I was traveling southbound when I experienced a seizure and lost control of my vehicle. I proceeded to veer to the left where I clipped several cars that were headed northbound and had stopped due to the realization that my vehicle was not under control. I then proceeded over a tree lawn and into a parking lot. I hit a dodge ram pickup with the right front corner of my vehicle and pushed that vehicle into another parked car that was next to it. Both vehicles ended up sideways and my vehicle ended up spun around 180 degrees. At this time my vehicle came to a stop. Police were called an paramedics arrived. The jaws of life were used to extract me from my vehicle. I was taken to a local hospital where it was determined that I suffered burst fractures of l1, l2, and l3. I also suffered an evulsion fracture of my left ankle. The police report states that I was travelling at a high rate of speed and that the vehicles which were northbound were just clipped. The airbags are both still within their cases as neither deployed. I would expect this of the passenger airbag as that seat was unoccupied but the driver bag should have deployed…
Was hit by right side impact by a truck without brakes at a stop light. It was going 40 MPH. Coming down hill as I took off at stop light . Pushed across 3 lanes of traffic. Air bags did not deploy ! Also I was hit on front right side panel . It later caused my instrument panel to not display the lights on warnings . Had to replace the panel . That's when I was informed that air bags will not deploy at all ! But flashes on and off as you drive. *js
Other body or interior problem
I opened the drivers door on my 2003 chevrolet blazer with only 13,000 miles and the door dropped down in my hands. The pins that hold the door hinge had partly lifted out. It would not have been out of the question for the pin to have fallen out completly in which case the hinge would have come completely apart and the door would have fallen off the vehicle. When I called the chevy dealer they were well aware of the problem. Apparently this happens all the time with s10 pickiups and blazers. Aside from the frustration of such a shoddy design I am afraid to think of the effect of such a failure at 65 MPH or of a door coming off in an accident as a result of faulty hinges. *ak
Tl*the contact owns a 2003 chevrolet blazer. While driving 5 MPH and looking in the blind spot, the contact stated that the passenger seat blinded him more. The seat prevented him from seeing other vehicles in his blind spot and nearly caused a crash. The contact would have to place the seat all the way down or forward in order to see properly. The dealer was notified of the failure a few years ago, but did not assist. The current mileage was approximately 19,000 and failure mileage was approximately 4,000.
Recalls on the 2003 model year
NHTSA has issued 1 recall campaign covering the 2003 Chevrolet Blazer, affecting an estimated 15,326 vehicles. A recall is a different kind of evidence from a complaint: it is the regulator and the manufacturer agreeing that something has to be fixed, and the fix is free for as long as the car exists.
The campaigns cover equipment:other:labels. Whether the work was actually done on the car in front of you is a question only the VIN can answer, and the manufacturer or NHTSA will answer it free.
Recalls also distort complaint counts. Publicity about a campaign reminds owners that complaining is possible, so reports for a recalled component often spike after the recall rather than before it.
EQUIPMENT:OTHER:LABELS
183,922 vehicles 2004-03-18- Defect
- Certain pickup trucks and sport utility vehicles fail to comply with the requirements of federal motor vehicle safety standard no. 208, "occupant crash protection."
- Consequence
- Some of these vehicles include incorrect statements on one of the air bag warning labels.
- Remedy
- Owners will be provided with correct labels and installation instructions. Owner notification began on june 4, 2004. Owners should contact chevrolet at 1-800-630-2438 or gmc at 1-866-996-9463.
Recall work is free at a franchised dealer regardless of the car's age. Check the VIN at nhtsa.gov/recalls before assuming it was done.
How it ranks in the 2003 field
The score at the top of the page, placed among its peers. The zones are the same thresholds the scorer applies, read out of the scorer itself, so the picture and the band word cannot disagree.
Scores are ranked within the model year, never across years, because an older car has had longer to accumulate reports.
- Left fewer and less serious reports
- Right more, or worse
- Marker this vehicle
Where 2003 sits in the model line
High risk for a 2003 — 226th riskiest of the 330 2003 vehicles we can rate. The comparison is always within the same model year, so an older car is never penalised for having had longer to break.
Across the 18 model years of this car that carry enough reports to score, 2005 comes out best at 64 and 2024 worst at 82, with 2003 itself at 66.
No other year of this model scores meaningfully better than 2003, so if this generation is what you want, the year is not the lever.
Within the 1996–2004 generation specifically, 2002 is the strongest year at 65 and 1999 the weakest at 70.
Scores compare each year against other cars of the same model year, so a low number on an older car is a real result and not an artefact of age.
Shorter is better. Years with too few reports to score are shown without a bar rather than as a zero, because no data is not good news.
Within the 1996-2004 generation, 2002 Chevrolet Blazer scores best at 65 and 1999 Chevrolet Blazer worst at 70.
What the numbers say to check
The mileages below are where the first quarter of reports for each mode had already been filed, which makes them the point at which a fault is worth looking for rather than the point at which it happens: fuel gauge or level sensor failure from about 30k.
On a 2003 Chevrolet Blazer with more miles than that on it, the useful question to put to a seller or a mechanic is whether fuel gauge or level sensor failure has been dealt with, and if so with what parts and at whose expense. A car that has already had the repair is in a different position from one that has not.
None of this is a diagnosis. It is a list of what other owners of the same model year reported, ordered by when they reported it, which is a good place to point an inspection and a poor place to stop.
The limits of complaint data
103 owner reports; fleet size estimated from this year's own recall paperwork. Every count on this page is therefore a floor: it is the number of owners who went to the trouble of filing with a federal agency, which is a small and self-selected fraction of the owners who had the fault.
Of those 103 reports, 68 carried an odometer reading, so the mileages here describe 66% of the sample rather than all of it. Owners also round: readings pile up on multiples of ten thousand, which is why this site publishes "about 90,000 miles" and not "91,438".
Named failure modes come from matching phrases in the complaint text, so a badly worded complaint can land in the wrong bucket. The effect washes out across hundreds of reports and does not wash out across five.
And nothing here predicts what one car will do. These are other people's complaints, filed years apart, on cars maintained by strangers. Read the page as a map of where this model year has previously gone wrong, then have the specific car in front of you inspected.
Questions this page answers
What are the most common problems with the 2003 Chevrolet Blazer?
The most-reported failures are fuel gauge or level sensor failure (14 reports, median 35,000 miles), airbag failed to deploy in a crash (9 reports, median 175,000 miles) and other body or interior problem (9 reports, median 30,000 miles). Counts come from owner complaints filed with NHTSA, which are voluntary, so they show what owners bothered to report rather than every fault that occurred.
At what mileage do 2003 Chevrolet Blazer problems start?
Fuel gauge or level sensor failure is the earliest failure mode to show up, with a median reported mileage of 35,000 miles and a quarter of reports before 30,000 miles. Across all failure modes on this year, the median report sits at 45,000 miles.
Is the 2003 Chevrolet Blazer reliable?
It scores 66 out of 100 on our risk index, which is high — 226th riskiest of the 330 2003 vehicles we can rate. The score is a comparison against other 2003 vehicles, not a prediction about any individual car, and it is built from complaint rates, severity and how early failures appear.
Which year of the Chevrolet Blazer is best?
Within the 1996–2004 generation, 2002 scores best at 65 out of 100 and 1999 worst at 70. Same body, same engines, different luck.
Where this comes from. Every figure above is computed from NHTSA owner complaints and recall records for this exact make, model and year. Complaints are voluntary and self-selected, so treat counts as a floor. The methodology page writes out each formula, and the same numbers are available as JSON.
What breaks at my mileage Compare with another car
Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt Published by AtWhatMileage How every figure is computed