GMC 2012 Sierra Series Owner's Manual page 27

Climate Control System (With Heater Only)
A. Fan Control
B. Temperature Control
C. Air Delivery Mode Control
See Climate Control Systems (with
Air Conditioning) on page 8 1 or
Climate Control Systems (with
Heater Only) on page 8 4.
I n f o r ma t i o n P r o v i d e d b y :
In Brief 1-21