2007 Chevrolet Blazer: what breaks, and at what mileage
What breaks on the 2007 Chevrolet Blazer
On the 2007 Chevrolet Blazer, the failure owners report most often is fuel gauge or level sensor failure, with 4 reports on file. Across every failure mode on this year, half the dated reports were filed before 60,000 miles.
What owners report breaking
Owners have reported 5 named failure modes on the 2007 Chevrolet Blazer, and the three most-reported carry 64% of everything filed, so the trouble here is concentrated rather than scattered.
Fuel gauge or level sensor failure leads with 4 reports and about 33 per 1,000 vehicles.
Other fuel system problem follows with 2 reports, median 45,000 miles.
ABS module or sensor failure follows with 1 report.
By system, the reports fall mostly into fuel (6), lighting (2) and brakes (1).
When these failures get reported
9 of the reports on the 2007 Chevrolet Blazer came with an odometer reading, and half of those were filed before 60,000 miles.
Cumulatively, 11% by 50,000 miles and 67% by 100,000 miles of the dated reports had been filed.
The busiest stretch is between 100,000 and 110,000 miles, which alone holds 33% of the dated reports.
0% of the dated reports were filed below 36,000 miles, so this is mostly a story about older, higher-mileage cars.
Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens
How reports accumulate
Every report with an odometer reading, cumulative, from 0 to 200,000 miles. 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, 1 mentions a crash. 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 3.27, 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, other fuel system problem at $300–$2,200, ABS module or sensor failure at $500–$2,400 and headlight failure or clouding at $150–$1,800. Dealer labour, a seized bolt or a part that is no longer made can push any of these past the top of its range.
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 | 4 | 4 | — | 62k | — | 33.1 | $300–$1,200 | Moderate |
| Other fuel system problem | fuel | 2 | 2 | — | 47k | — | 16.5 | $300–$2,200 | High |
| ABS module or sensor failure | brakes | 1 | 0 | — | — | — | 8.3 | $500–$2,400 | High |
| Headlight failure or clouding | lighting | 1 | 1 | — | 104k | — | 8.3 | $150–$1,800 | Moderate |
| Other lighting problem | lighting | 1 | 1 | — | 105k | — | 8.3 | $120–$1,200 | Moderate |
| Unclassified problem | other | 2 | 1 | — | 105k | — | 16.5 | — | Moderate |
This year had no usable recall paperwork, so the fleet-size estimate is the median of other years of the same model. 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 2007 Chevrolet Blazer draws about 91 per 1,000 vehicles, which puts it in the 97th percentile of complaint rates among 2007 vehicles we can rate.
That denominator is the weakest number on the page and it is fair to say so plainly. This year had no usable recall paperwork, so the fleet-size estimate is the median of other years of the same model.
The working figure is 121 vehicles. If the true number is twice that, every rate on this page is half what it says; the ranking against other 2007 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.
Other fuel system problem
Gage became erratic, not accurately reflecting amount in the tank, read full when not...low fuel lite came on when there was fuel in the tank, some time when started it reflects, we think accurately, then the next time does not-stays on full and over 30 minutes may gradually ease its way down. I have 3 friends at work with same issue, same vehicle. *tr
The gas gauge on our 2007 chevy trailblazer has stopped working. This nearly caused an accident because suddenly I thought I was leaking gas on the freeway after recently filling up. The car is 3 years and 2 months old with 42,000 miles. This seems to be a common defect judging by the complaints on the internet. Chevy/gm will not provide any assistance in fixing this known defect other than charging $800+. *tr
Where 2007 sits in the model line
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.
Within the 2005–2008 generation specifically, 2005 is the strongest year at 64 and 2006 the weakest at 66.
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 2005-2008 generation, 2005 Chevrolet Blazer scores best at 64 and 2006 Chevrolet Blazer worst at 66.
Where these figures stop being useful
11 owner reports; fleet size borrowed from other years of the same model. 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 11 reports, 9 carried an odometer reading, so the mileages here describe 82% 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 2007 Chevrolet Blazer?
The most-reported failures are fuel gauge or level sensor failure (4 reports, median 60,000 miles), other fuel system problem (2 reports, median 45,000 miles) and abs module or sensor failure (1 report). 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.
Which year of the Chevrolet Blazer is best?
Within the 2005–2008 generation, 2005 scores best at 64 out of 100 and 2006 worst at 66. 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