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.

Print this page


really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
82,664 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 Blazer electrical problems

electrical problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2003 Chevrolet Blazer:

Unsubscribe any time. We don't sell/share your email.

2003 Chevrolet Blazer Owner Comments

problem #6

Feb 162015


  • 175,000 miles


Takata inflators: I had left my house headed to work at approximately 6:30 am and got on I40 eastbound, it had snowed the day before and the roads had been treated and were clear for travel, I was traveling on a 3 lane highway in the left lane @ aprox 50mph and I applied my brakes to do upcoming traffic, when the ABS system locked. I attempted to let off and re apply the brake but the ABS system just stayed engaged and the front end started sliding hard to the left and I steered away from the pull. I subsequently hit the center concrete wall at approx. 40mph with the front passenger side of my car, which caused me to spin around and hit the passenger rear, I continued to spin until I was facing back East. My air bags did not deploy but it caused severe damage to core support and passenger side frame horn. It was a single vehicle accident and no damage was done to anything but my vehicle and myself, the ABS did not release within what I approximate to be about 6 seconds and this so called safety device nearly killed me. I was wearing my seat belt.

- Yukon, OK, USA

problem #5

May 202014


  • 115,000 miles
The contact owns a 2003 Chevrolet Blazer. The contact stated after several attempts starting the ignition, the engine failed to operate. The vehicle was towed to the residence. The vehicle was diagnosed by a certified mechanic, who informed that the starter relay switch would need to be replaced. The vehicle had not been repaired. The manufacturer was not notified of the problem. The approximate failure mileage was 115,000.

- Old Fort, TN, USA

problem #4

Sep 262011


  • 155,984 miles
Brake lights fail to turn on when brake pedal is pressed. Replaced brake switch, all tail lights. Mechanic investigation shows multi-function switch to be cause of problem as in previous recall for multi-function switch on 2002 Blazer. Requesting investigation and addition to the recall.

- Monmouth Junction, NJ, USA

problem #3

Aug 312006

Blazer 4WD 8-cyl

  • Automatic transmission
  • 37,000 miles


1. speedometer acting erratically. 2. dealer wanted to charge $450 dollars to change speed sensor. I told him he was crazy. They reconnected. Speedometer stared working again. 3. 7 months later speedometer starts acting erratically. I search websites and find that many other owners of 2003 Tahoe experience the same thing. Ordered new speed sensor to for self installation. Yet to install. 4. speedometer starts working again after battery changed. 5. runs for 5 days working fine then act erratic again. 6. ready to change. 7. thought I'd complain first. Think this is a safety issue and something should be done about it.

- Little Rock, AR, USA

problem #2

Feb 262004

(reported on)

Blazer 4WD 6-cyl

  • 13,000 miles
The was a sensor on the dash which controlled the headlights. When the vehicle was under a tree or in the garage, the headlights went dim. The dealer stated there was a code to over ride the system. The dealers had no access to the code. The sensor on the dash turned down the dash lights which made it impossible to read the instrument panel. At dusk the high beams came on without the driver's knowledge. The consumer is looking for the code that will allow the light to operate manually.

- Paso Robles, CA, USA

problem #1

Oct 152003


  • miles
I own a new 2003 Chevrolet Blazer... it is only 7 months old with only 7,300 miles on it. I was driving home tonight and heard a " clicking noise" which sounded like the turn signals were on... they weren't... when I pulled in my driveway and turned the Blazer off (key switch in lock position) steering wheel locked in position, my Blazer was still running ! my headlights were off, my inside lights were off, all panel lights were off, so my husband turned the inside panel lights, switch the Blazer turned off... something is terribly wrong with this... the whole system was like it went nuts... I have waited a few hours and since went back out there and tried it again... same thing happened... and it all happened out of no where... the Blazer has driven fine... no problems with it at all since purchase, but now there is also a clicking noise that can be heard under the hood when Blazer is running (sitting still).

- Douglasville, GA, USA

Not what you are looking for?