Print this page 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.


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
34,350 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.

2006 Chevrolet Trailblazer electrical problems

electrical problem

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2006 Chevrolet Trailblazer Owner Comments

problem #4

Mar 272009


  • 33,900 miles


The contact owns a 2006 Chevrolet Trailblazer. While driving approximately 45 mph, the battery indicator illuminated on the instrument panel. Ten seconds later, the brakes failed and the brake pedal extended to the floor. The contact had to apply the emergency brake in order to stop the vehicle. She drove to a nearby dealer and was informed that the alternator failed while driving and did not produce enough energy to the brakes in order to stop. The dealer replaced the alternator and the battery. The contact believes that this is a safety hazard and the manufacturer should issue a recall. Through online research, he found numerous complaints for this same defect. The current and failure mileages were 33,900.

- Austell, GA, USA

problem #3

Jan 072009

Trailblazer 6-cyl

  • Automatic transmission
  • 39,000 miles
The contact owns a 2006 Chevrolet Trailblazer. The contact stated that the alternator failed to work properly. As a result, the vehicle made loud noises. The noise occurred every time the vehicle was started for at least four months. The contact has not taken the vehicle to be inspected for the alternator failure. He was informed by another dealer that the bearings were faulty. He feels that this is a saftey issue because the alternator and battery are needed for the vehicle to operate properly. The current and failure mileages were 39,000. Updated 02-18-09 updated 02/18/09.

- Columbus, GA, USA

problem #2

Aug 152008


  • 23,000 miles
Car started making a very faint whining sound and has gotten quite loud and have had it looked at and spoke to other owners with the same problem and so far have found out that the rear bearing goes out in the alternator quite early as in my vehicle which only has 28,000 miles on it.

- Kelso, WA, USA

problem #1

Sep 152006

Trailblazer 4WD 6-cyl

  • Automatic transmission
  • 41,500 miles
2006 Chevy trailbazer has a bad alternator. I took the day off work to fix the vehicle. To my surprise you can't get one for this vehicle from anywhere. They are on backorder through GM. I guess I need to find a new way to work until my new one arrives.

- Summerville, SC, USA

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