One problem related to software has been reported for the 2005 Chevrolet Trailblazer. The most recently reported issues are listed below.
Traffic was horrible bumper to bumper, I was driving and realized not to rush so I stood in the first lane, as I was driving bumper to bumper I always drive within one ⽠car lengths in case I get rear ended. As I am driving bumper to bumper all for a sudden next thing you know my car just suddenly accelerated at incredible speed I manage to swerve into the emergency lane to avoid causing a multiple car pileup my car died instantly I started it up again and it just wanted to take off as it did before I turned the car off thinking to myself my god what just happened and what is going on, I am trying to calm my 12 year old child because it was the most frightening thing I am my family ever went thru. I press the break and just relax for a second and started the car up and it was fine. However, my nerves were pretty much shaken, I had taken the car to jj auto shop in hayward who is ase certified he did a diagnostic on the vehicle he said he could not verify what I was saying, no error lights and the history was clean. He also mentioned the computer at times does not pick up a split of a second acceleration. He believes my story and said everything is done thru computer so there is no finding as of the moment. I was not sold on that but he also recommend I could change the body throttle @ 700. 00 but he said I just don’t want you to buy the part so you could just drive in the slow lane and if it happens again to shift the car into neutral and turn it off ASAP> my thing is since car’s are computerize this should have why is it they could not verify my situation and also body throttle what he was looking at and what chevy thinks it was! so my complaint is for chevy did they overwrite software to overlook sudden acceleration? the only major issue I had had with my vehicle was when the speedometer went crazy as I was driving 110 but was really going 35mph.