To replace the auxiliary hvac control processor, remove the assist handles if equipped, followed by wind shield pillar moldings, sun bases, overhead console if equipped, and center pillar garnish moldings. Lower down the front of head liner to reach the auxiliary hvac control processor, disconnect the electricity connector, remove the processor from the headliner. In installation, place the hvac control processor back into the headliner and plug the electrical connector. Raise the front of headliner into place and reinstall garnish moldings, overhead console if equipped, sunshades and glass pillar moldings. Lastly, install the assist handles if present and service the hvac module actuators according to the needed procedures.