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: The 2002-2007 Chevrolet Trailblazer is known for many things, but perhaps it is most famous for its faulty fuel gauge.

This gauge flip-flops more than a politician during election season. Some report that the gauge says "empty" after a fill-up, while others report the gauge says "full" when they're running on fumes. Either way, there's one thing everyone seems to agree on: the darn thing is just wrong.

Following hundreds of complaints and a few accidents allegedly caused by the malfunction, the National Highway Traffic Safety Administration (NHTSA) opened an investigation into the issue in May 2011. Unfortunately for frustrated owners, no recall has been announced.


pretty bad
Typical Repair Cost:
Average Mileage:
69,571 miles
Total Complaints:
22 complaints

Most Common Solutions:

  1. not sure (10 reports)
  2. replace a resistor (6 reports)
  3. paid to have blower motor replaced (5 reports)
  4. replaced resister-because hot wire melted resister (1 reports)
2005 Chevrolet Trailblazer AC / heater problems

AC / heater problem

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2005 Chevrolet Trailblazer Owner Comments (Page 1 of 2)

problem #22

Nov 012013

Trailblazer LS

  • Automatic transmission
  • 68,000 miles



- , North Apollo, PA, USA

problem #21

Apr 212011


  • Automatic transmission
  • 58,000 miles

With the little amount of time my Trailblazer is driven, I wouldn't think anything should be going bad on it. This seems to be a common problem that Chevrolet possibly needs to consider recalling.

- , Henderson, NC, USA

problem #20

Aug 052011

Trailblazer V6

  • Automatic transmission
  • 106,000 miles

5 quit working right away, then all fan settings quit this year. I took out the glove box and can't find the resistor people are talking about. Dealer wants $265 to fix it. Need this in Florida heat.

- , The Villages, FL, USA

problem #19

Jul 112011

Trailblazer LS V6

  • Automatic transmission
  • 144,000 miles


About a week prior to actually going completely out, the blower for the front of the vehicle would act very hesitant. It would run full power, cold temperature, and then the next time I started the truck it wouldn't blow beyond the softest of breezes. Less than 3 days after this started happening, the blower in front went entirely out and the back blower, while it still blows full power, does not blow cold at all. I also feel a constant "hot" breeze coming from the floorboards which completely sucks in a Missouri summer, where our temperatures tend to hover in the upper nineties or higher with heat index. Before this, I adored my AC because it blew to the point of feeling frigid, winter-type cold from the vents and having to turn it down. Now, I pray it doesn't cost me a ton to fix because I don't have the money to repair everything that goes wrong.

- , Arnold, MO, USA

problem #18

Oct 252007

Trailblazer LS 4.2L Il 6

  • Automatic transmission
  • 53,000 miles

Brought 05 Trailblazer used, drove it for a year before ac went out.I'm told it will cost anywhere from 500. to 1600. to fix. Guess I will be suffering thru another HOT!!!! Texas summer.

- , Houston, TX, USA

problem #17

Jun 082010

Trailblazer V6

  • Automatic transmission
  • 78,000 miles

Had to change the blower for ac/heater and it really sucked it was cold the first time the really hot the second time and the money i had to use to fix it.

- , O'Fallon, IL, USA

problem #16

Feb 082010

Trailblazer V6

  • Automatic transmission
  • 76,000 miles


I had to change the blower for the ac/heater two times in a 6 month period it is silly they don't recall the things that go wrong on some many Trailblazers or with any cars.

- , O'Fallon, IL, USA

problem #15

Dec 222010

Trailblazer LS

  • Automatic transmission
  • 84,000 miles

I know it is a simple resistor that needs to be replaced, but I've done this once already. This vehicle seems to be loaded with electrical problems!

- , East Grand Rapids, MI, USA

problem #14

Dec 162010

Trailblazer LX V6

  • Automatic transmission
  • 71,000 miles

go out to work one day and no of many thing wrong what the 2005 Trailblazer

- , Creston, IL, USA

problem #13

Sep 152010


  • Automatic transmission
  • 125,000 miles

My a/c control button for blower started messing up,first #5 on dial stopped working,then #4 stopped and so-on.And one day blower did not work.I then spent aprox. 200.00 dollars on control panel,did not work.Then 95.00 dollars on new blower,did not work.Then i bought resister 55.00 dollars.When i unplugged resister i noticed plug was melted at contact,hot wire was black.I contacted a mechanic he stated that wire was a common problem and its a dealer item...wire cost 75.00 total cost 425.00 and 8-10 hours of headaches..

- , Sacramento, CA, USA

problem #12

Aug 162010

Trailblazer LS

  • Automatic transmission
  • 95,000 miles


I just read some of the complaints and solution to this problem. I hope it helps. I do feel that all of us should file a complaint though. This is not the only problem that I have had in the last few months w/this vehicle though.

- , Bartonville, IL, USA

problem #11

Feb 012008

Trailblazer LS V6

  • Automatic transmission
  • 30,000 miles

This was the first of 3 we've replaced so far since owning this suv. The resistor is burnt up. So this first time we thought nothing of it so we paid to get it fixed, had to it was cold outside! I did ask the dealer what caused the resistor to burn out? He said these things just happen. I said for a vehicle that's just 3 years old it shouldn't happen. He smiled and shrugged his shoulders.

- , Cincinnati, OH, USA

problem #10

Aug 252009

Trailblazer EXT LT V6

  • Automatic transmission
  • 72,000 miles

click to see larger images

blower fan motor stopped working

My blower stopped working on speed 5. We just ran it on 1 through 4 until it finally quit working at all. I got online and found the information on this website about a resistor and harness that seemed to fail frequently. Today, I took out the glove box and the blower and found the assembly directly behind the glove box. I bought a new resistor for 30 dollars at Auto Zone and tomorrow I am getting the harness. I think it will only cost me about $50 to fix this myself.

- , Spanish Fork, UT, USA

problem #9

Feb 112009

Trailblazer LT 4.2L V6

  • Automatic transmission
  • 45,000 miles

bought this car in june 2008 as a used car. 6 months later, a million things go wrong. this is just the first.

- , Hilliad, OH, USA

problem #8

May 122009

Trailblazer LS 4.2L V6

  • Automatic transmission
  • 84,000 miles

Here's another complaint about that so called "quality car" of mine. Now my AC goes out on me when were having one of the hottest heat wave ever. The temperature yesterday was about 110 in the shade and today was about 107. I couldn't pick up my 7 month old son from the sitter because of the heat. I had to have my wife pick him up with her air conditioned vehicle. I canvassed around and the average I got was about $700 to repair. They said that it could be the Blower Motor Resistor is burnt out and the harness (which would cost about $900). They said that this was another common problem for this car model. If I or someone else dies from heat exhaustion will they then recall this damn car? What else are they waiting for? I will definitely report this to and ODI (Office of Defects Investigation) or If anyone else has a problem like me please report it so we can get our problems fixed.

- , Brentwood, CA, USA

problem #7

May 042009

Trailblazer LS 3.2L

  • Automatic transmission
  • 60,000 miles

I have a 2005 Trailblazer and the a/c blower thing went out. I cant even drive it, it makes such an awful noise! It will cost me about $600 to get fixed. My parents have the exact same vehicle, and the same thing happened to them not once BUT twice in one month!! A friend also has the same kind except a 2003, and the same thing is wrong with about JUNKS!!!!

- , Belcourt, ND, USA

problem #6

Mar 072009

Trailblazer LX V6

  • Automatic transmission
  • 44,000 miles

What next, this shows a cheep auto or poor parts that only last through the warranty.

Another recall with the gas gauge.

- , St. Petersburg, FL, USA

problem #5

Dec 222008

Trailblazer LS 3.5L

  • Automatic transmission
  • 48,251 miles

I check all pertinent fuses but none were faulty. Checked to determine if another fuse was associated with the overall problem, everything checked out. I had a similar problem with an 98 Grand Prix whereby the blower only worked at the 5th position.

- , Rock Hall, MD, USA

problem #4

Nov 042006

Trailblazer LT 4.2V6

  • Automatic transmission
  • 21,800 miles

This is only beginning of problems. We had it fixed at the Chevy dealer we bought it from was under warranty. It was a resistor. Haven't had any more problems

- , Reader, WV, USA

problem #3

Jan 012007

Trailblazer LX V6

  • Automatic transmission
  • 76,000 miles

My 2005 Trailblazer has been breaking down since I bought it. Replaced ac system 600.00.

Gas gauge stopped working, haven't got it fixed yet and my paint job is rusting even though my car is always in the garage and is washed and waxed regularly.

- , Westerville, OH, USA

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