Two problems related to cooling fan have been reported for the 2005 Chevrolet Trailblazer. The most recently reported issues are listed below.
Fan motor only works on 1-4 settings, after a few weeks no setting works. Inspecting fan blower found burnt wires leading to the resistor, external before harness. New resistor and harness are needed to remedy.
Engine warning light flashes occasionally. This has been happening with this particular vehicle since I purchased the vehicle. Repeated visits to the local dealerships have resulted in no repair. The vehicle experienced total engine failure to which the dealership stated it was a cooling fan. Even upon replacing this fan, the light continues to flash on/off. At one point the light stayed on to which onstar reported an engine cooling/ac issue. This warning was reported to the dealership, they stated the problem was fixed but the light will continue to flash every couple of days. This is abnormal and has been addressed multiple times but nothing has been done to fix the issue.