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.


hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
84,224 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.

2003 Chevrolet Trailblazer EXT engine problems

engine problem

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2003 Chevrolet Trailblazer EXT Owner Comments

problem #5

Jan 052009

Trailblazer EXT

  • 87,000 miles


I purchased a 2003 Chevy Trailblazer ext in June,2007. In Jan of 2009 my problem first began. While driving normal speed, the service engine light sometimes comes on immediately followed by the "reduced engine power". when this happens, the car immediately loses power and the vehicles only goes around 10mph. You never know when it is going to happen. It can happen several times in a day or not at all. It is very dangerous when it happens because you can sometimes stop the traffic flow. The light will come off and the vehicle will return to normal speed if you stop the car and then restart it. It happens particularly when it is cold outside. In the morning it can happen 15-20 times before I get to work, and then in the afternoon only once or twice. I have taken it to several auto repair shops and no one seems to be able to fix it. They recommend one thing, I pay for it and then it happens again. I have had my clutch replaced and also the accelerator pedal system. I researched "Chevy reduced engine power" on the internet and there are a great amount of pages of people experiencing this same problem. It appears to happen to Chevy SUVS, in particular the trailblazer. I don't understand how so many people can experience this same problem and there not be a recall. I have taken it to 2 Chevy dealers and they don't even know what to do. I paid $18K for this vehicle in June, 2007 - I put $5K down and still owe about $10K. Chevy needs to recognize this problem and correct it. The vehicle is virtually undrivable and unsafe.

- Youngstown, OH, USA

problem #4

May 112009

Trailblazer EXT

  • 165,000 miles
2003 Chevy trailblazer transmission.. I usually have to stop, put the car in park, and then back in drive once or twice to get first gear to engage. Also, when passing or accelerating on the freeway, I am losing power.

- Fort Myers, FL, USA

problem #3

Feb 282008

Trailblazer EXT

  • 60,000 miles
Where should I start" purchased 03 trailblazer in 2/08 w/only 60,000 miles. Has been in shop 3 months..lost count of costs. A/C and heat not working hot air; clutch fan replaced; transmission slipping; engine cuts off while at stop-light. Should I go on" you would think w/only 60,000 miles on it--it was just getting broken in. I have never been so disappointed in a truck I am stuck with the truck and its more money to repair and can't afford to trade in.

- Kilmarnock, VA, USA

problem #2

Jul 012007

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 78,120 miles
Rear ac/engine coolant line was rubbed thru due to the defective installation of a heat shield. The two lines provide freon and engine coolant to the rear ac/heater. The GM part number is 15113349 and is on national back order because this part is not suppose to fail. GM currently has over 100 open tickets where this part is failing and they do not have any supply of replacement parts as this pipe is an aluminum pipe that ones from the front to the back and is not suppose to fail.

- Raleigh, NC, USA

problem #1

Nov 162004

Trailblazer EXT

  • Automatic transmission
  • 31,000 miles
NHTSA recall 04V527000, after almost being rear ended consumer went to the dealer and a new mother board was put on. Battery exploded. Consumer went to retrieve the vehicle after dealer made the repairs and it will not start.

- Inverness, FL, USA

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