Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety. 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:
93,165 miles
Total Complaints:
13 complaints

Most Common Solutions:

  1. not sure (13 reports)
2004 Chevrolet Trailblazer engine problems

engine problem

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2004 Chevrolet Trailblazer Owner Comments

problem #13

Jul 152015

Trailblazer Exstended 3.8L

  • Automatic transmission
  • 128,000 miles


the problem started with a service engine warning,scanned for codes & replaced what it coded. it ha sdone this multiple times,each time a different code appears or the same ones.nothing seams to solve the dam problem. what sucks is when lights on you have no cruise. The dealers high priced shop labor is killing my wallet, any ideas would be greatly appreciated. Thank you.

- , Shenandoah, IA, USA

problem #12

Jul 012012

Trailblazer LS 3;2 V6

  • Automatic transmission
  • 70,000 miles

Engine light has been on 5 or more years and on star said not to worry about it..Allanin

- , Fort Wayne, IN, USA

problem #11

Jul 232012

Trailblazer LS V6

  • Automatic transmission
  • 171,143 miles

Engine light came right after I bought the SUV and I had test ran it and nothing was wrong. So they check the gas cap and it was loose so I changed that but once again the light came. So I returned and they thought it was the gas cap and gas section which we/I changed it again. Still the came back on!! Not making me happy.

- , Highlands Ranch, CO, USA

problem #10

Mar 062012

Trailblazer LS 3.2L V6

  • Automatic transmission
  • 115,000 miles


The service engine light stays on all the time. We have hooked it up to a machine fixed what it told us to and the light went off for a minute then came right back on. Cannot figure out what the deal is if it's mechanical or something to do with the computer maybe??

- , Okeechobee, FL, USA

problem #9

Mar 192013


  • Automatic transmission
  • 76,944 miles

I was on the freeway and the check engine light came on and the car hardly moved. I was going about 10 miles per hour at that point. The engine just reduced power. It was VERY scary as I tried to find an exit. I then had to have it towed to the dealer. By the way this was in the evening, the dealer was not open so the tow driver just parked it and left the keys in the drop box. The next day I was informed the technician was trying to figure out why that happened because when he started the car it was fine. Anyway, I was called out of town on a family emergency. I was in contact by phone with the advisor, and they found lots of "problems" which cost me over $2200.00.

- , Durham, CA, USA

problem #8

Feb 232012

Trailblazer LS V6

  • Automatic transmission
  • 133,456 miles

This is ridiculous! As soon as I got the whole gauge panel fixed, my lights were off for a whole 10 minutes...I am ready to let the bank come get it or try to sell it. one problem is that my conscience will not allow me to let someone else get into this financial drowning pool!!!!!!!!! I HATE THIS SUV!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I want my Honda back! Chevrolet should make good on this!

- , Vidalia, GA, USA

problem #7

Dec 072011

Trailblazer LT V6

  • Automatic transmission
  • 103,100 miles


5 complaints to report the last 'check engine' light was on. vacuum leak, electrical components, heater modules, heater core, onstar turning on when touch steering wheel to turn up volume. replaced over 15 fuses, a/c wiring. water pump 3 times,heater core once already. all the other times were numerous of smaller projects that still added up to over $3000 in repairs, mostly covered by warranty. no more warranty and NOW here we go again. come on chevy, love the ride but can't afford repairs. a lot of single parents out here.

- , Mesa, AZ, USA

problem #6

Sep 162009

Trailblazer LT 4.2L I6

  • Automatic transmission
  • 72,000 miles

Code 320 came up ,Replaced O2 sensor,Then Code 410 came up,Replaced Air injection pump,Air pump Diverter Vaulve ,Light is still on.

- , Little Falls, NY, USA

problem #5

Feb 032010

Trailblazer EXT LS V8

  • Automatic transmission
  • 65,655 miles

Check engine light came on. Took it to auto zone and they stated it was the knock sensor. Said the engine was misfiring or firing too soon.

- , Richmond, IN, USA

problem #4

Apr 172009

Trailblazer LS V6

  • Automatic transmission
  • 40,000 miles

I have had other problems. I was told I need to replace my gas tank. I needed to have a motor replaced for my power seat to work and now the tachometer has malfunction. I would like to know if there is a recall on these items. If not it needs to be. There are others in this area that have had the same problem.

- , Peterman, AL, USA

problem #3

Oct 112008

Trailblazer LS 4.2L V6

  • Automatic transmission
  • 53,847 miles


Chevrolet should have a recall on this problem, I know of 5 Trailblazer owners that are having the same problems. The engine light stays on and the odometer works whenever it feels like it. I have to Chevrolet and the Silverado has no issues and it's two years older than the Trailblazer. I think due to all the problems they have is the reason why they stopped making them.

- , Miami, FL, USA

problem #2

Oct 092009

Trailblazer LT 3.2L V6

  • Automatic transmission
  • 60,000 miles

Check Engine Soon light kept coming on. Dropped my truck off @ the mechanic for oil change. They put the truck on a diagnostic which cost me an extra $30.00. It came back something is wrong with the Air System. They stated that could cost me $450.00

on top of another new problem, paying $16,000.00 for this truck, and now another problem this should all be included in recall probs. Since all the issues with my truck are the same complaints posted about this truck same year!! Come on GM u need to take care of us, like we've taken care of YOU!! By buying these vehicles!! Sincerely, a very upset Chevy OWNER!!

- , Caspian, MI, USA

problem #1

Jan 182006

Trailblazer LS 3.2L V6

  • Automatic transmission
  • 122,000 miles

Engine light is on and nothing wrong w/engine. No one seems to be able to get it to stay off.

- , Hartford, SD, USA

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