Two problems related to transmission failure have been reported for the 2004 Chevrolet Trailblazer. The most recently reported issues are listed below.
In April 2007, the '04 Trailblazer's transmission failed. At the time the vehicle had less than 50,000 miles. I drive the car very well - mostly highway miles as I commute for work - and the vehicle had never been used to tow. The transmission was repaired at a Chevrolet dealer, and less than 2 months later, the transmission failed again. I am very unsatisfied with the quality of this vehicle.
I own a 2004 Chevrolet Trailblazer and the transmission recently failed, due to causes unknown. This concerns me because I only have 54,000 miles on my vehicle and it has received all scheduled maintenance. Also I've done some research to find out that is a recurring issue starting in 2002 with the Trailblazer. I am going to contact Chevrolet for repair but my warranty is expired and I am sure is will have to pay for all repairs.