2011 GMC Savana 1500 Passenger Owner's Manual - Page 205

Climate Controls 8-5 Q (High): This position supplies the most amount of heat to the rear-seating area. Rear Climate Control System For vehicles with a rear heating and air-conditioning system, it maintains the temperature, fan speed and air delivery for the rear-seat passengers only. It also works with the main climate-control system in the vehicle. c (Medium): This position supplies half the amount of heat to the rear‐seating area. R (Low): This position supplies the least amount of heat to the rear-seating area. 9 (Off): Turns the rear heating system off. Front Climate Control Panel A. Fan Control B. Air Delivery Mode Control C. Temperature Control Use this control panel to maintain a separate temperature setting. Adjust the direction of the airflow or adjust the fan speed for the rear seat passenger(s).