Peterbilt 567/579 Heat & AC Parts Keep your Peterbilt 567 or 579 comfortable with reliable heat and AC parts. From AC switches and cabin filters to heater hoses and blower motors, this lineup has what you need to keep your climate control system running smoothly. With trusted brands like BESTfit and Cab Fresh, you can count on quality and compatibility for repairs or upgrades. Stay cool (or warm) on the road!