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.


hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
84,528 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 fuel system problems

fuel system problem

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2006 Chevrolet Trailblazer Owner Comments

problem #2

Jun 182011

Trailblazer 4WD 6-cyl

  • 89,055 miles


1.fuel gauge on our 2006 Chevrolet Trailblazer ls sport with 6 cyl. Engine became erratic going up and down without relation of how much gas was in the gas tank. This started when vehicle mileage was below 40,000 miles. 2. now the fuel gauge always reads empty, and we have to go by trip mileage to determine when to fuel up. Once June 18, 2011) when we hadn't filled the tank fully, the distance on it was misjudged and ran out of fuel on a main thoroughfare during heavy traffic. Thankfully an accident didn't happen. 3. we had checked the internet about this problem and found it wasn't rare, but quite prevalent on our vehicle and similar ones, due to defective fuel sending units having contacts corrode. We put in a bottle of GM fuel treatment, with no change. The expense to replace the combined sensor/fuel pump unit that is located in the gas tank isn't worth spending as the replacement part is identical to the original and the problem will happen again. If the fuel runs out in an intersection or rush hour traffic a crash could result that could cause injury or death..

- Fort Blackmore, VA, USA

problem #1

Feb 172010


  • 80,000 miles
The contact owns a 2006 Chevrolet Trailblazer. The driver added fuel to the tank; however, the gas gauge indicated that it was empty. The driver turned the vehicle off and back on to see if the gauge would reset; to no avail. The following day the gas gauge did indicate that the fuel tank was full; yet, while driving approximately 25 mph, the gauge slowly began to move up and down but never indicating that the tank was full. Since the fuel gage has malfunctioned, the contact is unsure of how much fuel was in the tank. The engine shut off a month ago because the fuel tank was empty and the fuel gauge did not indicate that. The driver did contact a mechanic who stated that they needed to replace the fuel pump. A mechanic stated that the failure was common for Trailblazers and the it would cost between $400-$750 to repair the vehicle. The failure mileage was 80,000 and the current mileage was 81,000.

- Maitland, FL, USA

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