YearToAvoid

2005 Chevrolet Trailblazer Ext 370 Reliability Data: Problems & Recalls

No verdict The 2005 Chevrolet Trailblazer Ext 370 has a complaint index of 100, the worst of the 2 model years with data, ranked 1 out of 2. Electrical System problems lead with 112 complaints (47% share), followed by Fuel System issues at 94 complaints (40% share), with no recalls filed.

Based on NHTSA complaints per model-year, not a reliability rating. Methodology

YearToAvoid Scorecard

Complaint Index
100/100
#1 of 2 Trailblazer Ext 370 years
Verdict
No verdict
vs. other years of this model
Complaints
237
unique NHTSA reports
Recalls
0
distinct NHTSA campaigns
Crashes
7
reported in complaints
Fires
1
Injuries
9
Top issue
Electrical System
Best nearby year
—
no alternative with data

Top 2005 Chevy Trailblazer Ext 370 problems

Share of this year’s NHTSA complaints by component group. Groups with 15+ complaints have their own page.

  1. Electrical System112 (47%)
  2. Fuel System94 (40%)
  3. Engine22 (9%)
  4. Structure & Body13 (5%)
  5. Visibility & Wipers9 (4%)
  6. Other8 (3%)
  7. Airbags7 (3%)
  8. Suspension, Wheels & Tires7 (3%)
  9. Transmission & Powertrain5 (2%)
  10. Brakes3 (1%)

A complaint can list more than one component, so shares add up to more than 100%. Shares are % of complaints.

What owners report

  • Window switch panels and dashboard electronics have caught fire or failed entirely, with drivers reporting fuel gauges, lights, and dashboard displays going out unpredictably.
  • Airbags failed to deploy during crashes, including a frontal impact and a spin on an icy bridge, resulting in injuries.
  • Power steering has failed suddenly at highway speed, causing violent shaking and loss of control.
  • New transmissions have failed to downshift into low gear at a stop or lost power shortly after purchase, sometimes at very low mileage.
  • Brakes reportedly locked up or failed to respond properly on wet or icy roads, leading to loss of control.
  • A left-side door failed to operate properly after a side collision.
2005 Chevrolet Trailblazer Ext 370 complaints: complaints filed per quarter252005 Q12007 Q12008 Q42010 Q32012 Q22014 Q22016 Q12019 Q4
237 complaints filed with NHTSA from 2005 Q1 to 2019 Q4; peak 2011 Q2 (25).

2005 Chevrolet Trailblazer Ext 370 recalls

No safety recalls on record for this model year.

2005 compared with other Trailblazer Ext 370 years

Complaint Index by model year (0 = fewest issues, 100 = most)025507510020052006
Complaint Index: 0 = fewest issues, 100 = most, relative to other years of this model. Avoid Caution Good Best
YearVerdictIndexComplaintsRecallsMPG
2005No verdict1002370—
2006No verdict0160—

All Chevrolet Trailblazer Ext 370 years: best and worst →

Frequently asked questions

Is the 2005 Chevrolet Trailblazer Ext 370 reliable?
Based on NHTSA owner complaints, the 2005 model has a complaint index of 100 and ranks 1st worst out of the 2 model years with data, driven mainly by Electrical System and Fuel System complaints.
What are the most common problems with the 2005 Chevrolet Trailblazer Ext 370?
Electrical System issues make up 47% of complaints (112 total), and Fuel System issues make up 40% (94 total). The median mileage at failure for electrical problems was 74,066 and for fuel system problems was 69,000.
Does the 2005 Chevrolet Trailblazer Ext 370 have any recalls?
NHTSA lists no recalls for the 2005 Trailblazer Ext 370.
Were there any crashes or fires linked to the 2005 Trailblazer Ext 370?
NHTSA data shows 7 crashes, 1 fire, and 9 injuries reported for the 2005 model year, with no deaths recorded.
How does the 2005 model compare to the 2006 Trailblazer Ext 370?
The 2005 model has 237 complaints and a complaint index of 100, while the 2006 model has only 16 complaints and a complaint index of 0.

Sources: NHTSA Office of Defects Investigation complaint and recall databases; U.S. EPA fuel economy data; NHTSA 5-Star Safety Ratings. Complaints are unverified owner reports.

Data updated Sep 24, 2026. Read the methodology and data sources. The Complaint Index is based on NHTSA owner complaints and recalls; it is not a reliability rating.