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Chevrolet Trailblazer EXT 370Model year report

2003 Chevrolet Trailblazer EXT 370 Problems

Complaints
14filed with NHTSA
Median mileage
140,000miles, 13 complaints with mileage
Recalls
0campaigns on record
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

Sources: NHTSA records for the 2003 Chevrolet Trailblazer EXT 370 (complaints, recalls, investigations). Report an error

NHTSA recorded 14 consumer complaints for the 2003 Chevrolet Trailblazer EXT 370. The part named most often is electrical system, with 6 complaints (43% of the total), followed by fuel system (3) and exterior lighting (2). 13 of the complaints include a mileage, and 8% of those were filed for vehicles with under 50,000 miles; the median is 140,000 miles. NHTSA lists 0 recall campaigns and 76 technical service bulletins for this model year. Electrical system complaints overlap with 11 technical service bulletins filed under the same part. Fuel system complaints overlap with 3 technical service bulletins filed under the same part.

This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Example complaints

Electrical system: “We were driving down the highway when our rear passenger door flew open, and will not stay closed or lock. We had to drive with someone back there holding it shut til we got to a store to ratchet strap it closed. I called chevy when I seen it was part of a recall for the 2005 but they would not look at mine because it was not the same year as the recall and want me to pay out of pocket to fix the problem, and would not tell me k=name of the part to see if I could buy it and fix it ourselves a lot cheaper.”

NHTSA complaint #10652805, filed 2014-11, 160,000 miles

Fuel system: “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. …”

NHTSA complaint #10839742, filed 2016-03, 153,000 miles

Exterior lighting: “This has been going on for three years since 2011 at night at random times our low beam headlights go out on us as your driving down the highway. They may come back on before you get home but we have drove 1hr 30 minutes and still not. We did take it in several times and they can not fine a problem. They said they can change this n that senor but couldn't say that would even fix it. But cost us $$$$$$ why can't some one fine out do a recall we hate driving on our highbeam and so does the people we pass or get behind. …”

NHTSA complaint #10630361, filed 2014-09

Visibility (wipers, defrost, mirrors): “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.”

NHTSA complaint #10758854, filed 2015-08, 87,000 miles

Mileage when problems were reported

8% of the 13 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 87,000 and 153,000 miles.

0%0–108%10–250%25–5015%50–758%75–10023%100–15046%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (13 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 140,000 miles.

Complaints by year filed

Fewer than 15 complaints, too few for a reliable trend.

201120122014201592016
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Recalls and investigations

NHTSA lists no recall campaigns for the 2003 Chevrolet Trailblazer EXT 370 in the data used here. A recall can apply to some vehicles of a model year and not others, so check a specific vehicle by VIN at nhtsa.gov/recalls.

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 76 on record; the latest 10 are shown.

See all 76 bulletins →

Other model years of the Chevrolet Trailblazer EXT 370

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
200616105,0000———Stable
200523770,0000——Not compared (before 2008)Stable
20041596,2500———Stable
200314140,0000———Not enough data
20026120,0000———Not enough data

All Chevrolet Trailblazer EXT 370 model years

Frequently asked questions

How many NHTSA complaints does the 2003 Chevrolet Trailblazer EXT 370 have?

NHTSA recorded 14 consumer complaints for the 2003 Chevrolet Trailblazer EXT 370 as of Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2003 Chevrolet Trailblazer EXT 370 is reported most often?

Electrical system is named most often, in 6 complaints (43% of the total), followed by fuel system with 3.

Has the 2003 Chevrolet Trailblazer EXT 370 been recalled?

NHTSA lists no recall campaigns for this model year in the data used here. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

At what mileage are problems with the 2003 Chevrolet Trailblazer EXT 370 reported?

Among the 13 complaints that include a mileage, the median is 140,000 miles and the middle half falls between 87,000 and 153,000 miles; 8% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.