2005 GMC Envoy Owner's Manual - Page 164

Rear Climate Control System Envoy Your vehicle has one of the following rear climate control systems. With any of these systems, the rear climate controls will be disabled when the front climate control system is in defrost. This occurs to provide maximum airflow to clear the windshield. H (Panel): When panel mode is selected in the front controller, the rear system will distribute air from the four headliner outlets. ) (Bi-level): When bi-level mode is selected in the front controller, the rear system will distribute air from the four headliner outlets and the third seat floor outlet. When floor mode is selected in the front controller, the rear system will distribute air from the third seat floor outlet. The temperature of the air coming through the rear outlets is determined by the front passenger's temperature setting. Press the PWR button to turn the rear climate controls on and off. Use the mode knob to change the direction of airflow (upper, bi-level or floor) to the rear seat area. 6 (Floor): The rear mode and temperature positions now mimic the front control system mode and passenger side temperature. 3-28