2001 Chevrolet Trailblazer Transmission and drivetrain Problems
- Complaints
- 5about this part
- Share
- 25%of 20 total for the year
- Median mileage
- 80,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the transmission and drivetrain of the 2001 Chevrolet Trailblazer, 25% of the 20 complaints for this model year. Where a mileage was given, the median is 80,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I have 2 Chevrolet trailblazers and the transmission has failed in both in the same way (broken sun shell). My research shows this is a very common problem and was fixed by GM starting in 2003.”
NHTSA complaint #10144032, filed 2005-11, 80,000 miles“Serviced my '02 Trailblazer at dealer before trip to mountains oil changed, coolant changed , brakes checked. Returned and next day noticed a leak under drivers side behind front wheel. Took back to dealer and told the transmission blew and need to replace front pump cover and other parts associated with it at $1700.”
NHTSA complaint #10233595, filed 2008-07, 74,700 miles“2001 transmission problems had to be fixed. In 2016 transmission started acting up again, reverse went out and wouldn't shift properly in 1st, 2nd gear. Had to be rebuilt again.”
NHTSA complaint #10849841, filed 2016-03, 116,000 miles“While pulling out onto a busy highwaytransmission jerked and bogged down. When trying to accelerate to keep from getting rear ended, I pushed the acceleratot but 1st to second gear would not engage. After backing of the accelerator the gears caught. Now it will not go in reverse and 1st to 2nd and 3rd to 4th has trouble engaging.”
NHTSA complaint #10088958, filed 2004-09, 39,000 milesRelated service bulletins
- 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…
- 10249579Jan 12, 2024This PI bulletin advises the technician on the proper way to install the pistons in an engine.
- 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…
- 10220319Sep 1, 2022This diagnostic tip advises the tech not to separate the flexplate from the torque convertor or damage my occur if the engine is started while diagnosing for noise from the…
- 10026804Oct 1, 2008Gmc: fluid leak from transmission oil cooler lines due to corrosion. All 2000-2006 light duty trucks equipped with the light duty automatic transmission.
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 2001 Chevrolet Trailblazer
5 complaintsBrakes
4 complaintsExterior lighting
3 complaintsBody and structure
3 complaintsAir bags
2 complaintsElectrical system
2 complaintsOther or unknown
2 complaintsEquipment
1 complaintsTires
1 complaints
← All problems reported for the 2001 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