99 SE V-6 ETS Problem

I have a 1999 Grand AM SE V6. I was driving yesterday and the Service Engine Soon light came on and the car began to run very sluggish. I then noticed that when I hit the ETS button, the Trac Off light would not come on. I took the car to the mechanic and he said I had a random cylinder misfire which he fixed. Now the Service Engine light no longer comes on, but I can't get my Trac button to work. Anyone know what to do?