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 / 2
Injuries / Deaths:
0 / 0
Average Mileage:
53,804 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.

2007 Chevrolet Trailblazer fuel system problems

fuel system problem

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2007 Chevrolet Trailblazer Owner Comments (Page 10 of 11)

« Read the previous 20 complaints

problem #34

Aug 102010


  • 32,000 miles


Gas gauge malfunction.

- New Port Richey, FL, USA

problem #33

Aug 012010

Trailblazer 4WD 6-cyl

  • 49,000 miles
Gas gauge is faulty. Does not read accurate fuel levels. When you fill the tank the check engine light turns on and then the fuel level will drop to empty and then back up to half tank.

- Aurora, CO, USA

problem #32

Jan 012010

Trailblazer 8-cyl

  • 0 miles
2007 Chevrolet Trailblazer ss gas gauge sensor malfunction. Fuel level indicator does not function properly and will trigger the service engine light to come on and off on any given day. Vehicle gives low gas indication even after filling up gas tank. If you google this problem or search auto forums, it appears thousands of people have this same issue and no one is doing anything about this.

- Vail, AZ, USA

problem #31

Aug 282009


  • 50,000 miles


The contact owns a 2007 Chevrolet Trailblazer. The contact stated that the check engine light illuminated consistently and the fuel sending unit failed. Whenever the contact filled the vehicle with gas, the fuel gauge would register an empty reading. The vehicle was taken to an authorized dealer who stated that there were no related recalls and the fuel sending needed to be replaced at the contact's expense. She called the manufacturer who offered no assistance. The failure mileage was approximately 50,000 and the current mileage was approximately 90,000.

- Linthicum, MD, USA

problem #30

Sep 132010


  • 60,000 miles
After we fill the gas tank, the needle will go to 1/2 full then as we drive further the needle goes all the way down to empty and the empty light comes on.

- Surprise, AZ, USA

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problem #29

Sep 042010


  • 53,800 miles
The Chevrolet Trailblazer has several complaints on-line about the fuel gauge not operating accurately and the need for the fuel sending unit needing to be replaced on several vehicles that are relatively new. This is an incredible nuisance. I have owned several vehicles in my life and have never had to replace this part in any car. I now have a 2007 Trailblazer and had to spend almost $600 on this part. I am curious why there are so many complaints on line and why there isn't a recall on this?

- Littleton, CO, USA

problem #28

Aug 172010


  • 73,000 miles


2007 Chevy Trailblazer gas sensor has malfunctioned. Found out that it is not under warranty! I have found many complaints about this on the internet. There should be a recall on this part and it should be replaced or covered by my warranty!

- Jonesboro, AR, USA

problem #27

Jul 252010


  • 44,000 miles
The contact owns a 2007 Chevrolet Trailblazer. The contact stated that the fuel light turned on intermittently which caused the check engine light to illuminate. The failure occurred even after the fuel tank was full. The vehicle was taken to an authorized dealership where the contact was informed that the fuel level sensor was defective. The vehicle had not been repaired at the time of the complaint. The contact had not spoken with the manufacturer. The VIN was unavailable. The current mileage was approximately 45,000. The failure mileage was approximately 44,000.

- Nashville, TN, USA

problem #26

Apr 152010


  • 36,000 miles
The contact owns a 2007 Chevrolet Trailblazer. While driving at an unknown speed the fuel gauge began to read as if the fuel tank were empty. Upon refueling the vehicle the fuel gauge operated normally for approximately 15 miles before reading as if there was no fuel in the tank. The vehicle was taken to an authorized dealer where he was informed that the sending unit needed to be replaced. The vehicle was not repaired and the failure continued to occur. The failure and current mileages were 36,000. The VIN was unavailable.

- Normal, IL, USA

problem #25

Apr 152010


  • 55,000 miles
Chevy Trailblazer fuel sending unit failed. The gauge starting acting erratically and now does not work at all. It is now extremely difficult to know how much fuel is in the car at any given time.

- Brunswick, OH, USA

problem #24

Apr 172010


  • 67,447 miles


Gas gauge reads empty when half full, fuel pump replaced.

- Spring Lake Hgts., NJ, USA

problem #23

May 052010


  • 78,000 miles
Gas gauge would not work - did not give accurate account of how much gas was in vehicle even after filling up. Gas light was on and would ding as if empty. Took car into Chevrolet dealership & it was a sensor in the gas tank. Gas tank had to be "pulled" and sensor had to be replaced. Would have cost me $800, but luckily I purchased an extended warranty when I bought the vehicle. I have seen numerous reports of this same thing happening to others with a 2007 Trailblazer - is this not a recall?

- Montgomery, AL, USA

problem #22

Mar 072010


  • miles
I bought this 2007 Chevy Trailblazer and baby it like there was no tomorrow. Now everything is breaking. First it was the racking pinion steering. Some how the seal busted. Second, the fuel gauge began to register empty even though it was full and joint ball went bad making some vibration and squealing sound. I got the fuel gauge fixed and joint ball, now the struts that lift rear window doesn't work. I was so eager to get this Trailblazer but it is costing me more money than what it is worth.

- Columbus, OH, USA

problem #21

Jan 152010


  • 43,000 miles
The fuel gauge quickly drops to empty after less than 1/4 of the fuel has been used. The dealer states that the fuel sender unit will need to be replaced costing $575. With only 43K miles on the car, it seems a little premature for this type of repair.

- St Charles, IL, USA

problem #20

Apr 272010


  • 54,130 miles
Fuel gauge fluctuates erratically. Tank can be full but the indicator light will come on and start "binging" while driving.

- Liberty, NY, USA

problem #19

Apr 042010


  • 40,000 miles
Fuel light on 2007 Chevy Trailblazer continually reads empty. Even after being filled up.

- Carleton, MI, USA

problem #18

May 012010


  • 45,000 miles
After fueling our 2007 Trailblazer, the gas gauge very slowly started to intermittently go to empty and/or 'ding' and turn on the low fuel light. Now, the low fuel light stays on at all times. We have been told that it is the fuel gauge sensor and will cost $500-$1000 to fix and that many, many others have been having this same issue.

- Brunswick, OH, USA

problem #17

Jan 152010


  • 55,000 miles
Fuel gauge falls to empty fewer than 100 miles after filling the tank. The tank is 22 gallons and the fuel economy is 17.8 mpg. I reset the trip meter so I can fuel up within 300 miles, just to be safe.

- Santa Cruz, CA, USA

problem #16

Mar 312010


  • 41,950 miles
Fuel level sensor fails in such a way as to indicate the car has fuel when it does not. This could result in a breakdown on a busy highway leading to a crash with injury or loss of life.

- Murrysville, PA, USA

problem #15

Apr 132009


  • 41,211 miles
I have a 2007 Chevrolet Trailblazer ls and the fuel gauge began to fluctuate between full and empty 0 ultimately staying on empty... this I found is a common problem with the Trailblazers and has been for awhile - many business associates have the same problem with different years of Trailblazer... what a rip-off, I feel that Chevrolet should have a recall to correct this - they are worse than Toyota.

- West Chester, OH, USA

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