Find aftermarket Peterbilt 359 Heat & AC Parts to upgrade your heating and cooling system. It's easy to keep your cab comfy with top-quality heat and AC parts for your Peterbilt 359. From blower motors and evaporators to heater cores and control housings, these replacements are built for a perfect fit and long-lasting reliability. Whether you're fixing worn-out parts or upgrading your HVAC system, this lineup has everything you need to stay cool or cozy on the road.