One problem related to transmission not go into gear has been reported for the 2006 Chevrolet Trailblazer. The most recently reported issues are listed below.
The contact owns a 2006 Chevrolet Trailblazer. The contact stated while driving 10 mph, he depressed the accelerator pedal to increase speed but the vehicle would not change gears. The contact then stopped the vehicle, shifted the gears until the vehicle moved in reverse. The contact placed the vehicle back in drive gear and the vehicle functioned normally. The vehicle was never repaired nor was the failure diagnosed. The manufacturer was not notified of the failure. The approximate failure mileage was 33,000. The current mileage was 51,490.