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:
63,892 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 drivetrain problems

drivetrain problem

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2007 Chevrolet Trailblazer Owner Comments

problem #11

Aug 272012


  • 101,000 miles


Was driving down the road transmission started to slip pulled over and had trans fluid everywhere. Replaced the lines and now not even 3 years later they are rotten again and will need replaced soon. I am lucky the first time they broke I didn't damage my transmission. I have seen where a lot of other people have and are having the same coast me around $150 for the lines and the fluid and filter to make sure there was no damage. I cant afford $150 every couple yrs.

- Powhatan Point, OH, USA

problem #10

Aug 012014


  • 80,000 miles
The contact owns a 2007 Chevrolet Trailblazer. After making contact with the shifter and pushing it forward, the gear shifter inadvertently switched from the drive position to the neutral position. The failure occurred while driving 30 mph. While in the neutral position, the vehicle began to lose power and acceleration. The contact indicated that the shifter would shift from drive to neutral without having to press the button on the shifter. During the failure, the shift selector indicator displayed that the vehicle was still in the drive position. The vehicle was not diagnosed or repaired. The manufacturer was not notified. The failure mileage was 80,000.

- Clay, MI, USA

problem #9

Nov 222013

Trailblazer 6-cyl

  • 87,000 miles
Both transmission cooler lines were heavily corroded and caused a leak. There is a tsb for certain model years and alot of complaints online. Tsb #pit-4722 -- GMC: Fluid leak from transmission oil cooler lines due to corrosion. All 2000-2006 light duty trucks equipped with the light duty automatic transmission. (NHTSA id #10026804, October 01 2008).

- Warrenville , IL, USA

problem #8

Jul 222013

Trailblazer 6-cyl

  • 89,286 miles


I was driving my 2007 Trailblazer home after a 150 mile trip to columbus and noticed oil spots on my driveway. I moved and parked the vehicle in another location where a large puddle of "oil." Fell under the engine. I climbed underneath and saw transmission fluid dripping from the frame onto the ground. I called graham Chevrolet and was told not to drive as it would cause severe damage to the transmission resulting in a costly repair or replacement. I called aaa and had the vehicle towed on a flatbed truck to graham Chevrolet where they replaced the corroded and leaking transmission lines with a bill of over $500 for the work done. They said GM knows of the problem and it is common to theses vehicles, but no recall or warranty repair was authorized. It was the customers problem to take care of. I have since found others with the same issue and also did an internet search showing many Trailblazers with this problem. My complaint is that the vehicle was designed and built with a defective transmission cooler line material subject to corrosion and failure over time. GM and Chevrolet should be responsible for this repair and issue a callback to prevent any potential accidents or injuries due to this failure.

- Mansfield, OH, USA

problem #7

Feb 012013

Trailblazer 6-cyl

  • 61,117 miles
I had gone to a friends house and on the way home my power steering malfunctioned. I took the vehicle to a local auto repair shop and was told the power steering cooler had rusted through. I also had to replace this part on my 2003 Trailblazer not realizing there was a problem. If this part rusts out on different years of the same model there seems to be a problem. The vehicle became very hard to steer. I know for a fact that I and many other people have had problems with transmission lines gasoline lines and power steering lines. I had to replace the gasoline line and fuel pump on the 2003, and just replaced transmission line on the 2007. I think there needs to be an engineering change on these vehicles. I also received a recall notice on the 2007 Trailblazer for the electric window switch. The notice said I would be notified when to bring my vehicle in. It has been several months since I received the notice and I am still waiting for notification. It cost me $350 to have the power steering repaired..

- Slippery Rock, PA, USA

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problem #6

Sep 072012


  • 65,000 miles
Fluid leak from transmission oil cooler lines due to corrosion.

- Forestdale, MA, USA

problem #5

Mar 182010

Trailblazer 6-cyl

  • miles


I have experienced problems with my 2007 Chevy Trailblazer since I purchased this car. The transmission messed up originally and now I am having problems with my gas gauge indicator. This recent problem started last year 2010. The levels were reading inaccurately at that time and seemed to have repaired itself. The beginning of this year, the indicators stopped working again. I never know how much gas is in my truck and I am paranoid and constantly going to the store to add more gas. I am understanding that this appears to be a problem with the majority of Chevy vehicles and GM actually knows that the problem exist and has done absolutely nothing to help the millions of loyal customers that purchased these cars. There is no reason that this all should be happening to my vehicle that I purchased brand new; so I am the original and only owner. Is there any help for the consumers that have purchased GM vehicles. I could see if this was a problem with one line of vehicles manufactured by GM but this problem appears to be all across the board. I have run out of gas numerous of times because I never know how much gas is in this vehicle. This is absolutely insane that GM can scam millions of customers and not fix a known problem.

- Mcdonough, GA, USA

problem #4

Jun 042011

Trailblazer 4WD 8-cyl

  • 58,324 miles
Transmission failure without any notice at intersection almost causing accident in a 2007 Chevy Trailblazer ss.

- Woodstown, NJ, USA

problem #3

Apr 212010


  • 94,000 miles
2007 Chevrolet Trailblazer.

- Rochester, NY, USA

problem #2

Mar 032007


  • 63,500 miles
My 2007 Trailblazer lost power during acceleration. On January 22 I took it to the dealer and it took them 4 days for the vehicle to act up so they could get a code. They replaced the powertrain control module. On March 3, 2010 it happened again, the same exact problem, while my wife was crossing a street. The rpms went from 2000 or so down to 5-600 while pushing the gas pedal. I had the truck towed in to dealer and got a loaner car under terms of my warranty. It is now day 6 and they cannot get it to act up again. I called GM customer service hotline and got a case # 71-810026931, but I am being told before they send a technician that can solve the problem I must take it to a second dealership at my cost as well as paying for towing and loner car for the first dealership to release the truck. They told me to drive it until it messes up then goto the dealer to get code. The safety issue is what happens to my family if it acts up in the middle of a turn with traffic coming. There is obviously a problem that the computer isn't recognizing. And because of that my family has to be the guinea pigs before GM will send a technician to solve the problem. My local mechanic seen the problem, the dealership seen the problem and thought they fixed it. What they did was put a bandaid on a cut that requires stitches. I have to put my family in jeopardy and that of whoever hits me so GM can save money and not send the technician. The same problem in just over a month, from losing power to the dealership having problems diagnosing it should send up a red flag that something is wrong and lives are in danger. But that does not seem to be the concern except from me. So I have to pay for a truck that im afraid to drive so GM doesn't lose money sending out a technician when they should be worried about a problem with a truck that could cost someone their life.

- Holly, MI, USA

problem #1

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

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