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hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
67,853 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2002 Chevrolet Trailblazer EXT transmission problems

transmission problem

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2002 Chevrolet Trailblazer EXT Owner Comments

problem #18

Jan 152010

Trailblazer EXT

  • 120,000 miles


The contact owns a 2002 Chevrolet Trailblazer ext. While the vehicle was parked he attempted to shift gear out of park position and it shifted into a different gear. The vehicle was taken to a local mechanic who advised him that the gear shift needed to be repaired. The vehicle was not repaired. The failure continued to occur. The dealer diagnosed the failure and advised him that the gear shift needed to be repaired. The contact referenced recall NHTSA campaign id number: 03V075000, power train:automatic transmission and was advised by the dealer that the recall repair had already been performed. The failure had been on-going for the last year. The vehicle was not repaired. The failure mileage was 120,000 and the current mileage was 126,000.

- Huntington, IN, USA

problem #17

Aug 162010

Trailblazer EXT

  • 155,000 miles
I own a 2002 Chevrolet Trailblazer ext which has been impeccably maintained by me. Prior to going on a vacation I brought the truck into my mechanic for an inspection as usual and he informed me the transmission fuel lines had to be replaced due to excessive corrosion. He also advised me that this was a common problem with this model which prompted Chevrolet to change the design. He checked to see if it was on a recall list but was not. I checked the NHTSA site and have noticed numerous complaints on this same issue. Why has this not been addressed with GM and placed on a recall list for replacement by a dealership?

- Chatham, NJ, USA

problem #16

Sep 192009

Trailblazer EXT

  • 142,000 miles
Leaking transmission hoses due to excessive corrosion due to poor design on 2002 Chevy Trailblazer ext.

- Fairport, NY, USA

problem #15

Jul 152008

Trailblazer EXT

  • 84,000 miles


While driving on the highway I lost power. I pulled over and found the transmission coolant lines had corroded. Transmission fluid had all leaked out and the transmission was ruined. The car was serviced at the dealer 2 days earlier at the dealer. I understand this is a typical problem with this vehicle and should be a recall.

- Shelton, CT, USA

problem #14

Apr 242008

Trailblazer EXT

  • 85,000 miles
No warning at all. Sounded like I hit something when pulling into a parking spot. I put the truck in reverse and heard the same thing. At 85,000 the transmission was shot and I had to spend almost $1,300 to have a rebuilt put in. This truck has been well-maintained and is in very good condition. I am very angry.

- Fort Wayne, IN, USA

problem #13

Mar 102008

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 83,145 miles
With no prior warning of defect, my 2002 trailblazer would not accelerate while trying to merge into highway traffic. After initial look through for any obvious signs of what may be wrong, I was unable to drive my car and had it towed to nearest dealership where a transmission failure was quickly diagnosed and I was quoted a repair cost of just under $5,000 !!! my wife and I think this is pretty odd considering the regular maintenance and absence of signs of trouble, so we researched the internet only to find out that transmission problems (particularly on 2002 trailblazer) are very common. It is believed that General Motors is very much aware of this and the phrase "silent recall" kept coming up.

- Reading, PA, USA

problem #12

Jan 082008

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 80,000 miles


Transmission went out at 80,000 miles with the sunshield and sun gear had trans replaced with no help form GM this is a problem with the 2002 trailblazers and up trans I fill that GM needs to recall this product be for it kills someone and make good to all consumers that had to pay for there's to be fixed.

- Fortson, GA, USA

problem #11

Jan 062008

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 20 miles
I was driving home when I heard a loud clunk. I turned down my street and the engine started whining and would not go any faster than 20 miles per hour. I pulled into my driveway and proceeded to look under the carriage expected to see oil dripping but, I saw nothing. I decided to start the car and drive around the block but I could not back out of my driveway the car would not go in reverse.

- Livonia, MI, USA

problem #10

Dec 012007

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 54,000 miles
Transmission on 2002 trailblazer failed for the second time within 83K. First time coming off exit ramp of highway at 54K. Second time was in the middle of an intersection at 83K. Transmission in question was the L460E.

- Springfield, MA, USA

problem #9

Apr 032007

Trailblazer EXT 4WD

  • Automatic transmission
  • miles
I went to put the vehicle in reverse this morning and it made a whinnying noise and wouldn't move. I thought maybe a had a toy under the car that was making that noise. So I shut the car off turned it back and still same noise when I went to back up. This is a 2002 with under 60,000 miles and has transmission trouble. Same as that other complaints I've read on here. Book says transmission service when 100,000 miles and I don't believe there should be so many problems with a vehicle with low miles and as many complaints as there has been GM should do something about it and think about a recall. I run a daycare and sometimes have 5 kids in the car explain that to the parents if they would have been hurt. It time for GM to do something about it.

- Lafayette, IN, USA

problem #8

Jan 132007

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 68,000 miles


I backed of the garage and heard a loud noise. As I pulled forward the truck moved very slowly for how far the gas pedal was pushed. I went to go in reverse again but the truck would not go into reverse and could hear a loud whining from the motor. I this just happened to day but I figure it's the transmission. Also, when I bought the truck I had problems with the temp. Sensor and the air conditioning the dealer took care of the problem with the air but the outside temp. Sensor is still broke. I don't know which is worse the failure of the transmission or, seeing all the like complaints on this site with no action.

- Menominee, MI, USA

problem #7

Dec 282006

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 75,000 miles
Transmission failed. Diagnosis was reverse sun shell failure (just like all the other complaints listed on this site)! GM refuses to offer any cost assistance with the repair or acknowledge that there is an obvious defect that should be recalled!!!

- Parma, OH, USA

problem #6

May 112006

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 52,000 miles
Morning of incident, would here a "clunking" noise after engaging the accelerator. That afternoon, while driving in fast lane of interstate at 65 miles per hour, upon engaging the accelerator, the vehicle was going to have to down shift, and instead, heard a loud "whirring" noise, and vehicle slowed down. Upon evaluation, the vehicle will not go into reverse, and has trouble shifting. Repair shopped diagnosed that the transmission has gone out.

- Nashville, TN, USA

problem #5

Aug 112005

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 43,000 miles
Sun gear failed in transmission put into reverse went 6"-12" loud clunk could drive ahead in low gear 2002 trailblazer had 43,000 miles. Dealer fixed under warranty no charge by replacing sun gear.

- Humboldt, IA, USA

problem #4

Jul 082005

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 52,000 miles
While taking off from a toll booth there was a big bang and the transmission would not shift into reverse and made a very loud whinning noise whe going forward

- Ludlow, MA, USA

problem #3

Jan 122005

Trailblazer EXT

  • Automatic transmission
  • 51,000 miles
My transmission went in January of 2005. It is now July and the same thing happened again. I had to fight with the dealership then because I only had the vehicle for 4 months and I am fighting with them again. It is the same problem. It won't shif out of 1st and it won't go in reverse and the loud noise is horrible.

- Saginaw, MI, USA

problem #2

Mar 152005

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 40,439 miles
Small "clunking" noise from under vehicle when shifting from park to reverse or drive. "clunking also evident when slowing to a stop. Ultimate transmission failure occurred while accellerating from a stop. A very loud "clunck" was heard from under the vehicle followed by a loud wirring noise. The vehicle would not shift from first gear afterwards until about 40 mph. The "wirring" noise continued when the vehicle was stopped and the transmission would not shift into reverse. The dealer's mechanic overhauled the transmission and replaced the following "worn" parts: Sun gear shell, sun gear, 3-4 clutch. Vehicle had 40000 miles at time of failure.

- Abilene, TX, USA

problem #1

Jul 142004

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 36,750 miles
Vechile transmissin failure.

- Bethpage, NY, USA

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