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:
2 / 35
Injuries / Deaths:
4 / 0
Average Mileage:
66,239 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 electrical problems

electrical problem

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2007 Chevrolet Trailblazer Owner Comments (Page 9 of 9)

« Read the previous 20 complaints

problem #13

Mar 242011


  • 30,459 miles


Gas gauge has been very inaccurate. Gauge will read full after fill up for approx. 20 minutes of driving, after that it will read empty with the low fuel light on. For my safety I am filling up every few days because I have no idea how much fuel is in there. I have been using my trip odometer to use a some base line. My fear is I will be pulling into traffic and it will run out of gas. I believe there should be a recall on this as it is a major safety issue.

- Paoli, OK, USA

problem #12

Dec 142008

Trailblazer 6-cyl

  • Automatic transmission
  • 30,000 miles
The contact submitted an email and requested that the official IVOQ be written verbatim to the email: I have a 2007 trailer Blazer and had these problems for 2 years. Gas gauge would show 1/4 to 1/2 tank but ran out of fuel twice. Gauge shows empty all the time now. Service department said it's a bad sensor in tank and will cost $ $800 to fix. This has been a problem with GM for 3 or 4 years. 1,000's of complaints on different forums. The failure mileage was 30,000. Updated 09/27/11 updated 10/11/11

- Milford, MI, USA

problem #11

Jan 032010


  • 59,000 miles
After moving halfway across the country, I noticed that my fuel gauge would say it was full for way too long, then at about 3/4 tank, drop basically to empty. After about 3 months, the gauge began to never report that it had anything in it. To this day, it never reads anything other than empty, with the warning light on and the initial warning on the dash stating that the fuel is low. No changes to the car's normal usage were made. The failure has never corrected. I have not had the fuel gauge repaired or replaced because it is a costly fix, and I can do the math to know when I need to fill up based on mileage.

- Woodbridge, VA, USA

problem #10

Oct 152010

Trailblazer 4WD 6-cyl

  • 76,000 miles


My 2007 GM trail Blazer's fuel gauge began to show an empty tank when I would fill it up, and then when I would drive for a while, it would register full. Eventually the engine light started coming on and going off at random. I took the vehicle to a garage and was told it would cost approx. $800. I could not afford that, so I started inquiring about the fuel pump and fuel sending unit. Eventually I found a web site where I could purchase the sending unit for approx. Half the retail price. I ordered the sending unit, took the vehicle to a garage to have it repaired and have not had any other problems with either the gauge not registering properly or the engine light coming on. If this investigation becomes a recall, since I have already made the repairs, can I be reimbursed? I would appreciate your response when your decision is made. Thank you.

- Walton, WV, USA

problem #9

Apr 012010


  • 34,000 miles
Antiskid warning lights always on indicating an antiskid malfunction. Low tire pressure light always on even though tires are adequate. Check engine light comes on for a few days/weeks and turns off again. Had the vehicle checked and there was no indication that anything was wrong. Fuel gauge reads empty even when full. All lights have turned off while driving down the road. Tried to shut off the engine, even removed the key, but the engine remained running.

- Canton, MI, USA

problem #8

Dec 282009


  • 38,000 miles
The electronics on my 2007 Chevy Trailblazer have gone out which includes the brake lights and the fuel gauge. The repair on the brake lights was minimal but it will cost over $800 to repair the fuel guage. Chevrolet has known about these problems for years but has not attempted to fix them or recall the vehicles.

- Downingtown, PA, USA

problem #7

Aug 192010


  • 22,000 miles


Vehicle instrument panel lights come on intermittently. First the traction control light then the tire light. Lights would either come on and stay on or blink, they would eventually go off or would clear when Trailblazer started. Took to dealer while under warranty and was told that there was a patch for the electrical system and it was corrected, the next week the problem began again. Returned to the dealer and said nothing was wrong. A few months later, I took vehicle in for a routine oil change and mentioned that I was still having trouble with the lights, I was told that it was a computer problem and that it would cost $400 to fix. (the auto was no longer under warranty) I asked dealer why they couldn't find anything wrong when car was under warranty but can find something now. They told me that it was a different problem. Smells fishy to me. Now my check engine light is on and I am not certain if it is the problem with the "computer chip" or there is a legitimate problem with the vehicle. I bought this vehicle with 22,000 miles on it and have had the problem since day one. Until I can afford to fix this problem, I cannot be certain if there is a real problem with the tires, traction control or engine.

- Excel, AL, USA

problem #6

May 262010


  • 54,000 miles
While driving down a highway vehicle lost 100% of all electrical power. No headlights, wipers, radio, nothing. After pulling to the road side, turned ignition key to off and attempted to restart vehicle. Vehicle started right back up. Following day scanned for fault codes, none were found.

- Hamilton, OH, USA

problem #5

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 #4

Feb 282010


  • 53,000 miles
Filled my tank and drove away the morning of the incident. While driving later that day my fuel gauge started going down while driving. It went to empty the low gas indicator light came on and it stayed that way for a few minutes before returning to full. This only happened 1X so far recently. I've also had problem with all the gauges going out while driving. Speedometer/fuel/ electrical/tach etc. Had to turn off the vehicle and restart to reset these functions in the past. 2-3X an had onstar run diagnostics. The electric stability control has also been coming on/off intermittently quite frequently at startup and at other times while driving. I've seen similar complaints on chat boards but few have take the steps to document them beyond the postings. There are many similar complaints on the web. Thank you

- Camp Hill, PA, USA

problem #3

Aug 152009


  • 98,000 miles


Check engine lightstarted coming on, then the stabil-trax and the engine deceleration light started coming on. When this started, the engine would shut down every time the lights came first it was at intervals of 40 to 140 miles. Whenever the engine first started this, you could shut the ignition off for 1-2 min., then the vehicle could be started and driven until the lights came on. Dotson Chevrolet, in big sonne gap, va. ( where we bought vehicle), has had the vehicle off and on for 6 weeks. They have changed the sending unit in the fuel tank, and the PCM module on the engine so far. As of today, 10-19-09 the vehicle is now shutting down at 8-10 miles. They say they are still checking, but now they are thinking the problem may be in the wiring. So far, we have luckily been driving in light traffic, where we were able to get out traffic to the side of the road, without any problem. If this problem occurs on the interstate of in heavy traffic, it could cause a serious accident. The dealer says the have been in contact with GM about the problem. I would have thought that GM would have tech people, of engineers that would know why the codes and lights don't correspond when this occurs, or would have some idea what might cause such a problem.

- Neon, KY, USA

problem #2

May 142008

Trailblazer 8-cyl

  • 3,580 miles
I have a problem where the throttle hangs up around 2000 RPM in all gears after being on the throttle and then immediately needing to slow down for any reason. This is a Trailblazer super sport equipped with the 395 hp 400 ft lb engine. I have been to the dealer. I have sued GM for this being a lemon and was paid off. Yet no fix. I have video of this happening. Other owners have the same problem and GM says because others do it the vehicle is acting as designed. Per george valez GM legal office. GM service request # 71-661522934 "high idle" I have logs where the acceleration takes place from 9 mph to 11 mph for 11 seconds of a tbss wild ride with no throttle. I start by downshifting it in manual 1st while slowing down. (brakes required to slow from 2K hang up RPM on down.) when the engine is slowing down there is a bump at ~2000 RPM where the engine speed raises above the input shaft speed of the transmission. Prior to this it was turning slower and compression braking. Time here is 0 of the 11 seconds. I hit the brakes at 14 mph to pull the speed down from 2K RPM and let off at 9mph 3 seconds later. Starting at 1381 RPM for the lowest engine RPM, trans input shaft 50 RPM slower then the engine indicating acceleration. Ac clutch just happens to kick in here. "here we go!" I say. The next 8 seconds we have the engine hits 1650 RPM and hunts around this RPM +- 75 RPM while we hit 11 mph. At 8.4 seconds the engine cuts back to 1468 RPM. This is when the trans input speed is faster than the engine RPM by around 50 - 70 RPM, this indicates engine finally slowing the vehicle again. It only takes 5 seconds from this point to slow down from 11 mph to 5mph without any brakes. That is what is scary - 16 seconds of fighting the engine when it could have stayed cut out and slowed down in less than 5 seconds from 2K RPM. The ac in this example makes the problem worse, but isn't 100% of the problem. Updated IVOQ/ 09/10/09

- Fountain Hills, AZ, USA

problem #1

Mar 032009


  • 48 miles
My 2007 new Trailblazer started on fire while it was off and parked for over 12 hours in may of 2008. After 2 and 1/2 months of not having my truck it was determined to be an electrical short. GM admitted it was a fault of theirs seeing as my truck was not even a year old and purchased new. Ever since the car was returned back to me the indicator lights go on and off and today I was driving and the check engine came on. I immediately took it in to have it looked at and was told that there is an electrical short and a fire could have started again had I not brought this in sooner. So for the 2nd time I am risking my life everytime I drive this truck!

- Peotone, IL, USA

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