First, locate the compressor under the hood. Remove the parts that are in the way of the compressor. Then remove the pump with the appropriate tools and install the new compressor into your vehicle.
Remove the other accessories that are in the way of removing the Compressor. Evacuate the A/C System. Remove the pump. Reinstall new pump and all accessories. Recharge the system.
You will need to get under the hood of the car to get started on this. Once under th hood you can locate and install the compressor with screws and other common tools.