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#BS-2004-CHETRA-7406

2004 Chevrolet Trailblazer Ext

Based on reports from 306 owners and 1 recall for this exact model.

Complaints
306
Crashes
10
Fires
6
Recalls
1
TSBs
126
🟡

Preliminary Verdict

Think Twice

Based on 306 complaints, 10 crashes, 6 fires, and 1 recalls.

See full verdict with buy/skip conditions

Top reported problems

1

battery not holding charge

2 complaints • Severity 8/10

$X,XXX
2

service engine light comes on

2 complaints • Severity 8/10

$X,XXX
3

crack in gas tank service engine light on

2 complaints • Severity 9/10

$X,XXX

Preview: What's in your full report

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Mechanic Inspection Checklist

!Check the ElectricalHIGH

97 owners reported electrical issues — failures commonly reported around 65K miles.

!Inspect the Electrical System: Instrument Cluster/panelMED
Look for symptoms of wear and premature failure
+ 6 more items in full checklistUnlock

Failure Timeline by Mileage

23
0–30K
85
30–60K
81
60–90K
32
90–120K
18
120–150K
16
150K+

Peak failure range: 30–60K miles (85 reports) • Median: 65K miles

Full report: which components fail at each mileageUnlock

30,000-Mile Cost Projection

Best Case

$X,XXX

Most Likely

$X,XXX

Worst Case

$X,XXX

Top cost driver: Electrical (97 reports).

Includes fuel costs, common repairs, and recall riskUnlock

Also in your report

Owner Intelligence

AI-synthesized themes from real complaints

Buyer Lot Checklist

Questions, test drive checks, walk-away triggers

Negotiation Talking Points

Data-backed dollar deductions

Buy / Skip Verdict

Final recommendation with conditions

10 sections total in the full reportUnlock all

Where the complaints fall

Electrical97 (32%)
Electrical System: Instrument Cluster/panel50 (16%)
Fuel System38 (12%)
Power Train:automatic Transmission11 (4%)
Lights10 (3%)
Engine10 (3%)
Speed Control9 (3%)
Other8 (3%)

2004 Chevrolet Trailblazer Ext: Known Issues & Problem Areas

Electrical Issues

Electrical complaints account for 32% of all reports filed for the 2004 Chevrolet Trailblazer Ext, with 97 owners filing complaints with NHTSA. The median mileage at time of complaint is 65,000 miles, suggesting issues tend to surface around the 65K-mile mark.

Electrical System: Instrument Cluster/panel Issues

Electrical System: Instrument Cluster/panel complaints account for 16% of all reports filed for the 2004 Chevrolet Trailblazer Ext, with 50 owners filing complaints with NHTSA. Owners should pay attention to electrical system: instrument cluster/panel-related symptoms during test drives and pre-purchase inspections.

Fuel System Issues

Fuel System complaints account for 12% of all reports filed for the 2004 Chevrolet Trailblazer Ext, with 38 owners filing complaints with NHTSA. Owners should pay attention to fuel system-related symptoms during test drives and pre-purchase inspections.

Power Train:automatic Transmission Issues

Power Train:automatic Transmission complaints account for 4% of all reports filed for the 2004 Chevrolet Trailblazer Ext, with 11 owners filing complaints with NHTSA. Owners should pay attention to power train:automatic transmission-related symptoms during test drives and pre-purchase inspections.

Data sourced from NHTSA owner complaints and community reports. The full report analyzes severity, repair costs, and failure patterns for each category.

Complaint trend by year

2
04
12
05
17
06
21
07
37
08
65
09
51
10
38
11
18
12
13
13
15
14
3
15
2
16
7
17
2
18
3
19

Complaints filed with NHTSA by year for the 2004 Chevrolet Trailblazer Ext. Recent trend: increasing.

Don't negotiate blind — know what this car costs to own

Repair costs • Negotiation scripts • Mechanic checklist • Buy/skip verdict

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Recall History (1 recall)

04V527000Nov 2004

EXTERIOR LIGHTING:BRAKE LIGHTS

ON CERTAIN SPORT UTILITY VEHICLES, VIBRATION AND HEAT MAY CAUSE THE TAIL LAMP/STOP LAMP BULB TO LOOSEN IN ITS SOCKET. IF THIS OCCURS, THE BULB MAY FLICKER AND EVENTUALLY BECOME INOPERATIVE.

Recall severity analysis & seller scripts

The full report rates each recall's severity and gives you scripts for asking the seller about recall completion.

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The worst model year for the Chevrolet Trailblazer Ext is the 2006 — worth knowing if you're cross-shopping years. The biggest problem area is engine.

About this data

NHTSA Complaints

Federal database of owner-filed safety complaints. 306 records for this vehicle.

NHTSA Recalls

Manufacturer-issued safety recalls. 1 recall found for this vehicle.

Repair Cost Data

Real-world repair costs from owner reports and independent databases.

Other Chevrolet Trailblazer Ext Model Years

2009200820072006200420032002
View all Chevrolet Trailblazer Ext years →

2004 Chevrolet Trailblazer Ext: Frequently Asked Questions

What is the most common problem with the 2004 Chevrolet Trailblazer Ext?
The most commonly reported issue with the 2004 Chevrolet Trailblazer Ext is related to the electrical, with 97 complaints filed with NHTSA.
Is the 2004 Chevrolet Trailblazer Ext reliable?
The 2004 Chevrolet Trailblazer Ext has 306 complaints, 10 crash reports, and 6 fire reports filed with NHTSA. The full report analyzes whether these numbers indicate real risk or are proportional to the vehicle’s popularity.
How much does it cost to fix 2004 Chevrolet Trailblazer Ext problems?
Repair costs vary by issue. The full BumperScan report includes detailed repair cost estimates (low/median/high) for every major issue, plus a 30,000-mile total cost of ownership projection.
Does the 2004 Chevrolet Trailblazer Ext have any recalls?
Yes, the 2004 Chevrolet Trailblazer Ext has 1 recall on record. The full report includes recall severity analysis and scripts for asking the seller about recall completion.
What mileage do Chevrolet Trailblazer Ext problems start?
Based on 255 complaints with mileage data, the median mileage at time of complaint is 65,000 miles. The highest concentration of reported issues occurs in the 30–60K mile range. The full report breaks down exactly which components fail at each mileage bracket.
What’s in the full report?
10 sections of AI analysis: severity-ranked issues, component scores (0-100), 30K-mile cost projection, failure timeline by mileage, recall details with seller scripts, owner sentiment analysis, mechanic checklist, buyer lot checklist, negotiation ammo with dollar figures, and a buy/skip verdict.
How is this different from free NHTSA data?
NHTSA gives you raw complaint text. BumperScan cross-references 2.1M+ complaints with community repair cost data, EPA fuel data, and recall records — then uses AI to synthesize it into actionable advice with dollar figures.
How is this different from Carfax?
Carfax is VIN-specific history ($45/report). BumperScan is model-level reliability intelligence — what problems this car is known for, what they cost, and whether you should buy it. Complementary, not competing.
What if the report isn’t useful?
100% money-back guarantee. If the report doesn’t help you make a more informed decision, we’ll refund you — no questions asked.
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10 sections of AI analysis based on 306 owner reports. Know before you buy.

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