2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 26

Dual Automatic Climate Control System Transmission Range Selection Mode A. Driver and Passenger Temperature Controls B. Fan Control C. AUTO D. Defrost E. Air Recirculation F. Outside Air G. Air Delivery Mode Control H. Display I. Power Button J. Rear Window Defogger K. Air Conditioning L. PASS (Passenger) The Range Selection Mode switch is located on the shift lever. To enable the Range Selection feature, move the column shift lever to the M (Manual) position. The current range will appear next to the M. This is the highest attainable range with all lower gears accessible. As an example, when 4 (Fourth) gear is selected, 1 (First) through 4 (Fourth) gears are available. See Climate Control System (With Heater Only) on page 4‑19 or Climate Control System (With Air Conditioning) on page 4‑20 and Dual Automatic Climate Control System on page 4‑23. 1-20