1/ check engine light continually came on. 2/replaced o2 sensors numerous times. 3/replaced throttle body, due to engine revving from idle to 2500 rpm for no apparent reason 4/ engine would stumble and stutter on acceleration at various times then magically clear up. 5/ while driving engine would just shut down. 6/wheel bearing hub assembly, had to be replaced on three wheels. 7/electrical system most lights worked with the exception of headlights remote key-less entry, alarm system and remote trunk opener. Re-wired light system to provide normal and high beam lighting. Repair failed after one year. 8/ Car started to have oil leaks. 9/ GM mechanics did not have the knowledge to properly fix this car. It was major trouble after the first year. drove under these conditions until I could no longer put up with it.