This NOS GM A/C compressor heat switch with part number 6599306 is perfect for your Cadillac, Buick, Oldsmobile, or Chevy. It is a vintage part that is still in excellent working condition. The switch is specifically designed to control the heating and cooling functions of your car's air conditioning system. With its brand being GM, you can rest assured that you are getting a high-quality product. This switch is a must-have for any car enthusiast who wants to maintain the originality of their vintage car's air conditioning system.ej71