2003 Chevrolet Trailblazer LTZ 6 Cyl 4.2L
"Unknown Driver error, what does this mean?
When I turn on key to start, error message of Unknown Driver appears and car will not start.
this happen to me one time while I was rumaging inside my suv, cleaning all trash and debris out. first, as usual I unlock vehicle with remote, later when cleaning I decided to get on passenger side and was there for sometimes. I got out close door and got back on driver side not knowing that suv thought I was not driver. 'unknown driver' pop. I had to get out of vehicle and use my remote to reenter, making sure i hit remote unluck button several times. this did the job hehe. next time I would always use remote to reenter your vehicle. just a thought, hope it works.