Print this page Notes: It would be ill-advised to blaze any trails with the 2004 Trailblazer. Its faulty fuel gauge could leave you stranded.


pretty bad
Typical Repair Cost:
Average Mileage:
131,625 miles
Total Complaints:
4 complaints

Most Common Solutions:

  1. not sure (2 reports)
  2. replace ignition coil (2 reports)
2004 Chevrolet Trailblazer engine problems

engine problem

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2004 Chevrolet Trailblazer Owner Comments

problem #4

Mar 192016


  • Automatic transmission
  • 151,000 miles


Car was idling hard, and sounded like it was loping at low RPMs. This had been happening for a couple months so I didn't think too much about it. Suddenly the car's check engine light started flashing. I drove to car to Autozone and had them check the check engine light. They said it was either water cylinder 1, or the ignition coil was bad. I bought a new coil and replaced the spark plug. Check engine light went off, and the car has been running smoothly since. Coil was $68, and the fix took about an hour.

- , Shreveport, USA

problem #3

Jun 092015

Trailblazer LS 4.2L

  • Automatic transmission
  • 255,500 miles

Not really a complaint. I had to fix it and I did. Easy to fix with a youtube video. I had P0305 code and took a chance on the problem.

- , Portsmouth, VA, USA

problem #2

Apr 132004

Trailblazer LS

  • Automatic transmission
  • 100,000 miles

Since the day I drove it off of the lot the check engine light will come on and off. It will not stay on long enough to register a code so I have been told numerous times from the dealer! Piece of crap car!

- , Mentor, OH, USA

problem #1

Dec 052005

Trailblazer LS 4.2L

  • Automatic transmission
  • 20,000 miles

The engine light would flash on/off very quickly. Chevy would tell me: 1) nothing is wrong or 2) some ridiculously expensive fix. TURNS OUT NOTHING EVER FIXED IT. It's still flashing on/off.

- , Phoenix, AZ, USA

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