Note About Difference Between ETS and TCS Options

There are minor differences between the two options available for the Buick. For further information, refer to "Description and Operation".

If you are diagnosing trouble codes and you are not sure which system you have, go to the trouble codes for the Traction Control System (TCS) option as it has the complete list of codes for both systems. For other diagnostic charts, you will need to refer to the specific system for the vehicle.