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

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