Chevrolet Repair: Ac, fan motor, freon

Question
when I turn my ac on sometimes a smelly smoke like substance  comes out,any clue. Also I bought the car about a month ago with 79500 mi any special thinghs i need to have done?

Answer
AC-Either the fan motor is going bad, or a freon/liquid problem or something fowl is in the system, should be checked by a qualified ac mechanic. Vehicle-all fluids checked/changed, brakes checked, belts/hoses checked, alignment/shocks checked, and battery,alt. and cables checked, Good Luck!