MY truck is running sluggish, my ABS light is on,how hard is it to fix?

Thank you for your reply ROY.I didnt get the codes from the mechanics they didn't have them, they said they don't need them. If i go to auto zone or advance auto they tell me if the check engine light is not on they cant tell me what is going on( with all their knowledge?. Dont know what else to do. All i know is that my truck i9s running like the engine is pulling to much weight.