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.


really awful
Crashes / Fires:
3 / 6
Injuries / Deaths:
1 / 11
Average Mileage:
53,890 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 (Page 11 of 22)

« Read the previous 20 complaints

problem #235

Apr 302009

Trailblazer 4WD 6-cyl

  • 54,000 miles


2006 Chevrolet Trailblazer. The gas gauge has stopped working completely. This is a safety hazard because it is impossible to know how much gas is left in the gas tank. This is a danger as I could run out of gas while driving. Although I can use the odometer to "guess" about gas, it is not a definite measure of the amount of gasoline I have left. I know that this has been an issue with other Chevrolet SUVS and trucks. I checked on fixing the problem but because the entire gas tank has to be pulled from the vehicle, it will cost approximately $800 to fix the problem. Because this appears to be a recurring problem with Chevrolet and GMC SUVS and trucks, I believe that this is an issue that should be addressed by Chevrolet and GMC.

- Nashville, TN, USA

problem #234

Mar 252011


  • 135,000 miles
Inaccurate gas gauge. Unexplained stalls. The gas gauge initially would show more gas than was available and later digressed to always showing empty. Continuous problem. 6 stalls in which the vehicle would not start after staling. All stalls occurred in parking lost with no accidents. Waiting 30 minutes to restart the vehicle. From November 2010 to present.

- Cadyville, NY, USA

problem #233

Oct 152010

Trailblazer 4WD 6-cyl

  • miles
I have a 2006 Chevrolet Trailblazer 4-wheel drive SUV and the fuel gauge started reading half full or empty when the tank was full. Now, the fuel gauge simply doesn't work. I have not yet paid the expensive sum to replace the fuel gauge sending unit and am now simply relying on odometer mileage to know when to fuel.

- Forest Ranch, CA, USA

problem #232

Dec 012008

Trailblazer 4WD 6-cyl

  • 35,200 miles


After completely filling up my gas tank I restarted the vehicle. The gas light came on, low fuel warning chimed and the gas gauge read empty. I immediately restarted and got the same indications. Within a minute or so of driving the light went out and the gauge began to slowly rise. While driving the gauge would continue to slowly swing up and down, occasionally swinging low enough to trigger the low fuel warning (every 3-5minutes while moving). After about 1/4 tank of gas had been used the gauge seemed to stabilize and read accurately. The period of erratic behavior returned every time the tank was filled and appeared to be worsening (lasting longer with each cycle). On 12/09/2008 vehicle was serviced under warranty at a dealer and the fuel level sending unit was replaced. There have been no incidents since.

- Fairfield , CT, USA

problem #231

Feb 012011


  • 45,000 miles
My gas gauge has been fluctuating. Sometimes the gauge would show empty when there was gas. Other times it would show there was fuel in the tank and there wasnt. I called my Chevy dealer and told them what happened. They said that they had heard of other people having this problem, but there was no recall. I was told that the repair would be very expensive because the fuel tank would have to be dropped. I was told to use my trip odometer to keep track how many miles was driven on a tank so that I wouldnt run out of gas. I work for GM and I contacted our local customer service rep. I was told to have the repair made, pay for it and maybe something could be worked out. I am filing this complaint because I heard the usnhtsa was investigating this same issue. I wanted someone to know there are more of out here with the same problem.

- Medina, OH, USA

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problem #230

Jul 132010

Trailblazer 6-cyl

  • 40,000 miles
In mid-2010 the fuel gauge on my 2006 Trailblazer became erratic and soon after stopped working. The gauge is on empty, the fuel light stays on and the check engine light remains on continuously. The vehicle had about 40K miles on it when the problem started.

- Providence Forge, VA, USA

problem #229

Apr 122011


  • 35,000 miles


Gas gauge began fluctuating then failed. Needle goes between full and empty at any given time. (caused by faulty fuel level sensor/sender) I have had two other GM vehicles in the past ten years that have had their gas gauges fail. Obviously a common problem with GM vehicles that they have failed to correct.

- Pahrump, NV, USA

problem #228

Feb 152011


  • 90,000 miles
Over the past few months, the fuel gauge on makes false readings on a 2006 Chevy Trailblazer ss 6.0L. Upon filling up to a full tank the gage will say 'full' however while riding over bumps or accelerating/decelerating the gauge will bounce to empty and full regardless of the actual fuel level. This has occurred for the past 20,000 miles continuously after fill up until approximately half the tank is emptied. Once the gauge stops bouncing between full and empty the reading is no longer accurate. In once case I ran out of fuel while on a highway while the gauge read 1/4 tank moments prior to running out of gas and stalling out. I was told there is an electrical short occurring in the fuel sending unit and is a known problem and would require replacing the entire sending unit to fix the issue.

- Hubertus, WI, USA

problem #227

Apr 102008

Trailblazer 4WD 6-cyl

  • 55,000 miles
2006 Chevy Trailblazer fuel gauge stops working.

- Clarkston , MI, USA

problem #226

Feb 042011

Trailblazer 6-cyl

  • 110,000 miles
I have replaced the fuel gauge, fuel pump on my 2005 Trailblazer after it quit working. I also have a 2006 Trailblazer and my wife ran out of gas, when we filled it up, the gas gauge did the same thing as the 2005, so we have to use the odometer to know when to fill up. When I called my mechanic, he explained the situation was the same as my 2005. This is a very expensive repair.

- Montgomery, AL, USA

problem #225

Apr 042011

Trailblazer 6-cyl

  • 133,000 miles


Fuel gauge started to fluctuate about a month ago. The vehicle has approx 135K miles on it. Had onstar run diagnostic and showed "high fuel sensor" error to take the car in for service...service engine light came on as well. When the tank is full, same issue as others have had, the gauge registers empty then starts to go up after several hours. To this date, the engine light goes on and off; every time put gas in registers empty to half when full. I have ran out of gas once last week on way to work, luckily I was not on interstate yet when gauge read I had almost half tank. When I took to dealer for regular oil change asked them to check it. They confirmed bad sensor and $600 repair cost to drop tank and fix issue. The part costs $45 at local auto parts store - crazy! since this is an issue that all drivers are having GM should issue the recall and fix the issue!

- Valparaiso, IN, USA

problem #224

Jan 172011


  • 96,000 miles
Fuel gauge does not work properly and fluctuates between being empty or being full. Must use trip odometer to monitor miles in order not to run out of gas. Originally when problem started, fuel gauge would read empty after filling up tank and then after approximately 25-30 miles of driving gauge would read as being full. Now gauge just constantly fluctuates between empty or full.

- Wilmington, DE, USA

problem #223

May 022009


  • 50,000 miles
The contact owns a 2006 Chevrolet Trailblazer. The contact stated that the fuel gauge would provide inaccurate fuel level readings sporadically. The vehicle was taken to the dealer but was not repaired. The VIN was unavailable. The failure mileage was 50,000 and the current mileage was 73,000.

- Farmington, MN, USA

problem #222

Sep 012010


  • 39,000 miles
I was traveling on four-lane divided highway which is one of the major thoroughfares for our city when the vehicle suddenly shut off. The gas gauge read above empty, however the vehicle ran out of gas. Traffic was fairly heavy at the time and had I not been traveling in the right lane and able to readily reach the emergency lane the safety of my passenger and myself could have been in jeopardy,

- Bristol, TN, USA

problem #221

Jan 092011

Trailblazer 4WD 6-cyl

  • 70,000 miles
We own 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 $600-$1200. To repair the vehicle. The failure mileage was 70,000 and the current mileage is approx. 76,000.

- Manahawkin, NJ, USA

problem #220

May 012010


  • 85,000 miles
I have a 2006 Chevy Trailblazer. The fuel gauge gives empty reading most of the time and will then show a high fuel level reading. I have 105000 miles on it. The fuel level reading can not be trusted. This started after filling the fuel tank on time. It was not overfilled.

- West Lafayette, IN, USA

problem #219

May 012010


  • 36,000 miles
Fuel level sensor quit working so that gas tank always showed empty. An exhaustive internet search turned up a lot of other people with the same problem. Tried to get Chevy to replace under warranty as a known failure but they would not. Finally paid a dealer to fix it. This is a well known problem to Chevy that they failed to recall or fix.

- Aurora, CO, USA

problem #218

Feb 012010


  • 56,000 miles
Was reading a news article today that NHTSA is investigating fuel gauge issue on GM SUV's. considering my experience, I thought NHTSA would want to know of this issue and the resolution. Back in February 2010 the fuel gauge on my government issued 2006 Chevy Trailblazer started to act in a strange way. Upon fueling up it would read full, then go to empty in a minute, then go back to 1/2 full, then back to empty and then after 20 minutes it would stay on empty for a day or so, then go back to a "normal" reading. During the time this happened, and until it was repaired at a gov authorized repair garage, I had to use approximate milage to confirm how much fuel remained. It turned out, according to the repair facility, that a pump in or at the fuel tank had to be replaced. Have not had that issue since the repair. Repair was done outside of warranty and cost $457 ($300 in labor, $157 for the gauge unit) to have it fixed.

- Philadelphia, PA, USA

problem #217

Jun 012009

Trailblazer 4WD 6-cyl

  • 88,000 miles
Gas gauge does not work. Engine light and fuel lights stay on constantly. Wife has run out of gas several times requiring roadside assistance and placing her in danger of accident.

- Okeechobee, FL, USA

problem #216

Jan 042011

Trailblazer 4WD 6-cyl

  • 40,000 miles
Gas gauge fails after filling tank. Will start reading correctly after a couple of trips with vehicle and when gas usage gets to about 8 gallons used, gage will read empty again and check engine light comes on because it thinks it is out of gas.

- Wilson, NY, USA

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