How do you turn off the check engine soon light on a 1997 Buick Riviera?

There is no "check engine soon" light on a 1997 Buick Riviera. Instead, this model has a "Service Engine Soon" light. To turn it off, you will need to take the car to a mechanic to have the problem diagnosed and repaired. The light could signal several issues which range from a minor leak to something more serious so ignoring could cost money in the long run.