What do you do with a ets off light is on an check engine light is onin a 1999 Chevy caviler?

ETS is the traction control system. If you want it, you simply push the button to turn it on... you may have hit it inadvertently.. I used to own a 99 Grand Am (another GM product) and constantly did the same thing. Or it could be a fault in the ETS system. As for the check engine light, the first thing you do is find out the cause of it. You can go to any auto parts store and have them read the fault codes with their OBD2 scanner.