(The photo is from Bing Images. It does show a 1999 Alero, but mine is bronze in color rather than red.)
Step 1: The steering wheel with controls
The switches on both the left and right side of the steering wheel are parts of one harness and are not sold separately. Internet prices for this switch harness combination come to about $53 (plus shipping and handling). Having these switches replaced at a dealership shop cost about $200 around 2007. The rest of my car still works well, but I do not want to spend that much money on a Cruise Control switch set for a twelve year old car with more than 100,000 miles on the odometer. And, should we replace the car, it will be easier to sell if the Cruise Control switch works properly.
I live in the USA and our automobiles have the steering wheel on the left-hand side of the car. When I use the phrase "driver's side" it means left side of the car. If I use the phrase "passenger side" it means the right side of the car. I realize that is not the scheme used in some other parts of the world.