Just bought a beater lesabre for driving to work. No cats on it and the service light is on, so most likely o2 sensor.Justwanted to do an engine scan but couldnt find the hook up. They even have one? I had an 86 cutlass and that had one, but didnt know if this model year had one. Thanks for the help

 

first, please read this https://www.buickforum.com/forum_pos...=1479&PN=1





idk what year you have, but all gm cars ive come across that have a computer, have the obd port on the drivers side, under the dash.