Leson Chevrolet - Service Center

i went in with my check engine light on when my tahoe was still under warranty and was told that nothing was wrong. several months later i returned back to the service department with the same complaint but still under warranty and was told that nothing was wrong. several months later i returned back to the service department with the same complaint but my vehicle is not under warranty now. I went in on wed. may 23, 2007 to have the check engine light checked at 9:45 am and was told that they couldn't have my vehicle checked out and that I needed an appointment for a technician to look at the vehicle. they gave me a appointment for may 30, 2007 for my 7:00 appointment and was informed that I couldn't wait cause policy states that I leave the vehicle and after their lunch, (l:30pm) they would call me and let me know what diagnos was. I asked why wasn't i informed of this before and why with an appointment at 7:00am it would take them over five hours just to tell me what needed to be done. I got no reasonal answer other than that's the way they do this. I again asked why I wasn't informed of this when I came in for the first time on May 23, 2007. I live in LaPlace, La now why would I come this far knowing that I had to leave the vehicle without making arraignments for another form of transportation. More