One problem related to crankcase (pcv) has been reported for the 2004 Chevrolet Trailblazer. The most recently reported issues are listed below.
The caller said that when she would be at a light the vehicle would stall. She would hit the gas pedal and the vehicle would hesitate before taking off. Engine service light came on/off. On July 25, 2005 dealer checked and reprogrammed automatic transmission control module( pcm). On July 29, 2005 dealer checked and replaced the pcm again , and on August 1, 2005 dealer replaced a 02 sensor. Dealer said they could keep and drive vehicle to see if that fixed the problem . Dealer would not give her a temporary vehicle to drive while she waited for her vehicle to be worked on. Dealer said the 02 sensor was the problem. Would not offer an extended warranty. Dealer will not give her enough money for it as a trade in.