2004 Chevrolet Trailblazer Ext engine and engine cooling problems
16 owner complaints filed with NHTSA name the engine and engine cooling on the 2004 Chevrolet Trailblazer Ext — 6% of all complaints for this model year.
What owners report
“Car felt "stuck" in gear, wouldn't accelerate, low on transmission fluid. Added more fluid, replaced speed sensor, camshaft & crankshaft sensors. Still having issues with rpms going high, car slamming from one gear into another. Also cannot run heat while driving, fan draws power & causes engine to…”
filed Mar 7, 2012
“This vehicle had been parked in the driveway from 7:45 pm, (august 10, 2011). I was awakened at approx. 3:55 am on 8-10-2011 by hearing a muffled boom. At 4:00 am (aug. 11, 2011) I heard a loud bang type noise. I immediately got up and went to investigate. I went outside and found my 2004…”
filed Aug 13, 2011
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
This bulletin advises the technician of possible location of an internal coolant leak from a specific cylinder head and location.
06-06-01-019C · Service Bulletin/Repair Instructions · issued Mar 14, 2024
Engine and Engine Cooling problems in other Trailblazer Ext years
| Year | Reports | Share |
|---|---|---|
| 2006 Trailblazer Ext | 4 | 2% |
| 2003 Trailblazer Ext | 16 | 5% |
| 2002 Trailblazer Ext | 14 | 14% |
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.