2004 Chevrolet Trailblazer Ext power train problems
17 owner complaints filed with NHTSA name the power train on the 2004 Chevrolet Trailblazer Ext — 7% of all complaints for this model year.
What owners report
“Automatic transmission slips when it tries to shift into 3rd or 4th gear, I read that there was a report on this happening but there was not a recall as far as I know, I recently purchased this vehicle from the original owner who says they never received any paper work from gm about doing repairs…”
filed Feb 17, 2017
“The transmission cooling lines corroded and caused a transmission fluid leak. The engine rpms increased and the vehicle lost power while going down interstate 86. When the fluid leaked out of the transmission cooling lines, it sprayed all over the exhaust pipes, which caused a severe fire hazard…”
filed Oct 25, 2014
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
GM 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 inadequate packaging or shipping. This…
24-NA-141 · Service Bulletin/Repair Instructions · issued Jul 24, 2024
Power Train problems in other Trailblazer Ext years
| Year | Reports | Share |
|---|---|---|
| 2006 Trailblazer Ext | 6 | 3% |
| 2003 Trailblazer Ext | 49 | 16% |
| 2002 Trailblazer Ext | 20 | 20% |
Other reported problem areas on the 2004 Chevrolet Trailblazer Ext
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.