2007 Chevrolet Trailblazer Transmission and drivetrain Problems
- Complaints
- 15about this part
- Share
- 2%of 732 total for the year
- Median mileage
- 65,000miles
- Trend
- FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
NHTSA recorded 15 complaints about the transmission and drivetrain of the 2007 Chevrolet Trailblazer, 2% of the 732 complaints for this model year. Where a mileage was given, the median is 65,000 miles. 1 of these say a crash was involved, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“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 problems.it 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.”
NHTSA complaint #10706224, filed 2015-04, 101,000 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. …”
NHTSA complaint #10549613, filed 2013-10, 89,286 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. …”
NHTSA complaint #10497930, filed 2013-02, 61,117 miles“I purchased a brand new Chevrolet Trailblazer at the end of 2007. Since then, I have had multiple service issues with the car, most notably a faulty front axle that had to be replaced. In january 2009, my service 4wd light came on and I could not put my car into 4wd. I immediately took my car to the dealership, who could not find a problem and returned my car to me. A week later, I was driving my car in the snow in 4wd, getting ready to enter the highway, when the car stalled and the service 4wd light came on again. …”
NHTSA complaint #10379306, filed 2011-01, 11,000 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. …”
NHTSA complaint #10318256, filed 2010-03, 63,500 milesRelated service bulletins
- 11009088Sep 16, 2024This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be…
- 11006421Jul 24, 2024GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or…
- 11001321May 16, 2024This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.
- 11000119Apr 26, 2024This service bulletin provides technicians with information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
- 10250347Feb 2, 2024This Warranty Admin service bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and…
- 10249579Jan 12, 2024This PI bulletin advises the technician on the proper way to install the pistons in an engine.
- 10245395Nov 6, 2023This service bulletin provides a vibration analysis worksheet the technician can use in conjunction with the appropriate Vibration Analysis-Road testing procedure when diagnosing…
- 10242843Sep 1, 2023The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the…
- 10242061Aug 7, 2023This service bulletin provides technicians with updated information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
- 10237387May 30, 2023This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be…
Transmission and drivetrain: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 1 | 8% |
| 2025 | 6 | 23% |
| 2024 | 8 | 22% |
| 2023 | 10 | 13% |
| 2022 | 35 | 31% |
| 2021 | 41 | 21% |
| 2009 | 1 | 4% |
| 2008 | 10 | 5% |
| 2007 | 15 | 2% |
| 2006 | 50 | 5% |
| 2005 | 51 | 3% |
| 2004 | 62 | 6% |
| 2003 | 103 | 11% |
| 2002 | 310 | 27% |
| 2001 | 5 | 25% |
| 2000 | 5 | 19% |
Other parts of the 2007 Chevrolet Trailblazer
311 complaintsElectrical system
200 complaintsExterior lighting
151 complaintsVisibility (wipers, defrost, mirrors)
82 complaintsAir bags
27 complaintsSteering
23 complaintsEngine
22 complaintsElectronic stability control
17 complaintsOther or unknown
16 complaintsBrakes
12 complaintsEngine cooling
12 complaintsBody and structure
11 complaints
← All problems reported for the 2007 Chevrolet Trailblazer
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology