Left.CREW CAB. PILLARS & FLOOR. Right.CREW CAB. W/S pillar trim screw. A bolt which attaches the Heater Core or bracket to it's mounting point. A Screw that is used to secure the Heater Core Case to it's mounting point. A Screw that is used to secure the HVAC Case to it's mounting point. A Screw used to secure the HVAC Heater Control Cable to its mounting surface. A Screw used to secure the HVAC Heater Core element to its mounting surface. Body A-Pillar Trim Panel Screw. Sun Visor Screw. Body A - Pillar Trim Panel. HVAC Bolt. HVAC Control Cable. HVAC Element. HVAC Unit. SunVisor. Windshield Pillar Trim.