Research · Sport Utility Vehicle - 2WD
2005 Chevrolet Trailblazer ExtRecalls, problems, MPG & safety
NHTSA lists 0 safety recalls and 1,703 owner complaints for the 2005 Chevrolet Trailblazer Ext. Most complaints involve electrical system (718) and fuel system, gasoline (502). The EPA rates it 14–15 mpg combined.
Combined MPG
14–15mpg
EPA · 4 versions
NHTSA overall
—
Not rated by NCAP
Safety recalls
0campaigns
NHTSA
Owner complaints
1,703
Top: electrical system
Fuel cost / yr
$4,150est.
EPA estimate, best version
Safety recalls
NHTSA campaigns for this model year
0 recalls found in NHTSA data for the 2005 Chevrolet Trailblazer Ext as of Nov 10, 2026.
Data from NHTSA Recalls API · synced Nov 10, 2026NHTSA vehicle page
Owner complaints by component
1,703 complaints filed with NHTSA · Jan 2005 – Aug 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Nov 10, 2026 · Full problem breakdownNHTSA vehicle page
What owners report most
Verbatim excerpts from NHTSA complaints, by component
Electrical system
718 reports5 crashes11 fires
“FOR SEVERAL YEARS THE LOW BEAM HEADLIGHTS WOULD GO OFF AND ON INTERMITTENTLY. NOW, THEY ARE MOSTLY OFF WHICH MEANS I CANNOT DRIVE MY VEHICLE AT NIGHT ANYMORE UNLESS I WANT TO BLIND PEOPLE OR GET STOPPED. I HAVE CHANGED HEADLAMPS, RELAYS AND FUSES TO NO AVAIL. NOW, I SEE THAT MANY OTHERS WITH THE SAME MAKE AND MODEL SUV HAVE BEEN HAVING THE SAME ISSUE BUT NO RECALLS HAVE BEEN ISSUED FOR THIS YEAR MODEL. THIS IS A MAJOR SAFETY ISSUE WHEN WE HAVE TO DRIVE WITH THE HIGH BEAMS ON AND WHEN THE LIGHTS GO OFF UNEXPECTEDLY. IF YOU WILL ISSUE A RECALL FOR ONE YEAR MODEL HAVING A PARTICULAR ISSUE, WHY WOULD YOU NOT DO THE SAME WITH ALL YEAR MODELS HAVING THE SAME ISSUE? COME ON CHEVROLET AND NHTSA, LET'S GET THIS PROBLEM SOLVED TO SAVE SOME LIVES. IT IS VERY SCARY TO BE DRIVING AND HAVE YOUR HEADLIGHTS GO OUT AND A MAJOR PAIN TO HAVE TO BE SURE YOU ARE HOME BY DARK OR NOT BE ABLE TO GO OUT AFTER DARK BECAUSE YOUR HEADLAMPS ARE OR MAY STOP WORKING.”
Fuel system, gasoline
502 reports1 crash3 fires
“2005 CHEVROLET TRAILBLAZER. CONSUMER WRITES IN REGARDS TO REIMBURSEMENT FOR FUEL LEVEL SENSOR RECALL REPAIRS. *SMD THE CONSUMER STATED THE EXHAUST MANIFOLD NEEDED TO BE REPLACED. THE CONSUMER REQUESTED TO BE REIMBURSED FOR THE SENSOR RECALL AND THE MANIFOLD REPAIRS, *JS”
Exterior lighting
155 reports2 fires
“MOST RECENT, I AM DRIVING DOWN THE ROAD MY HEAD LIGHTS GO OUT. NOTHING ELSE, JUST THE MAIN HEAD LIGHTS. ALL.OTJER LIGHTS STAY ON. HIGH BEAMS WORK, PARKING LIGHTS STAY ON. THIS IS NOT SAFE!!!”
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 10, 2026
Engines, transmissions & drive
4 versions rated by the EPA
- EPA class
- Sport Utility Vehicle - 2WD, Sport Utility Vehicle - 4WD
- Engines
- 4.2L 6-cyl · 5.3L 8-cyl
- Transmissions
- Automatic 4-spd
- Drive
- Rear-Wheel Drive · 4-Wheel or All-Wheel Drive
- Fuel
- Regular Gasoline
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
Data from EPA fueleconomy.gov · synced Nov 10, 2026EPA listing
EPA fuel economy by version
City / highway / combined, annual fuel cost and CO₂
EPA
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| TrailBlazer Ext 2WD Auto 4-spd, 6 cyl, 4.2 L · Rear-Wheel Drive | 13 | 18 | 15 | $4,150 | 592 |
| TrailBlazer Ext 2WD Auto 4-spd, 8 cyl, 5.3 L · Rear-Wheel Drive | 13 | 19 | 15 | $4,150 | 592 |
| TrailBlazer Ext 4WD Auto 4-spd, 8 cyl, 5.3 L · 4-Wheel or All-Wheel Drive | 13 | 18 | 15 | $4,150 | 592 |
| TrailBlazer Ext 4WD Auto 4-spd, 6 cyl, 4.2 L · 4-Wheel or All-Wheel Drive | 12 | 17 | 14 | $4,450 | 635 |
- 15mpg comb.
- 15mpg comb.
- 15mpg comb.
- 14mpg comb.
Data from EPA fueleconomy.gov · synced Nov 10, 2026 · Fuel cost is EPA’s annual estimate (15,000 mi, 55% city)
NHTSA 5-Star Safety Ratings
1 tested variant
NHTSA has not published 5-Star Safety Ratings for the 2005 Chevrolet Trailblazer Ext as of Nov 10, 2026.
Data from NHTSA NCAP Safety Ratings API · synced Nov 10, 2026Vehicle 1357
Maintenance basics
General guidance, not the OEM schedule. Check your owner’s manual.
General guidance
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
- Engine oil & filter5,000–10,000 mi
6–12 months - Tire rotation5,000–7,500 mi
Every oil change - Engine air filter15,000–30,000 mi
1–2 years - Cabin air filter15,000–25,000 mi
1–2 years - Brake fluid—
2–3 years - Coolant60,000–100,000 mi
5–10 years - Spark plugs60,000–100,000 mi
— - 12V battery—
3–5 years
Typical intervals for modern cars. Severe service (towing, short trips, extreme heat or cold) shortens them.
2005 Trailblazer Ext questions
How many recalls does the 2005 Chevrolet Trailblazer Ext have?
0 recalls found in NHTSA data as of Nov 10, 2026.
What are the most common 2005 Chevrolet Trailblazer Ext problems?
Owners filed 1,703 complaints with NHTSA. The most-cited components are electrical system (718), fuel system, gasoline (502), exterior lighting (155). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
What MPG does the 2005 Chevrolet Trailblazer Ext get?
The EPA rates the 2005 Chevrolet Trailblazer Ext at 14–15 mpg combined, depending on engine and drivetrain (4 versions rated).
Data from NHTSA & EPA · synced Nov 10, 2026