See also:

2011 GMC Sierra 2500HD Review
The "professional grade" brand unveiled the 2011 GMC Sierra Heavy Duty lineup at the 2010 NTEA Work Truck Show. Most of the technical specifications of GM's HD pickups are identical, but ...

Climate Controls
A. Fan Control B. Temperature Control C. Air Delivery Mode Control D. Air Conditioning E. REAR (Rear Climate Control) F. Recirculation G. Rear Window Defogger Dual Automatic Climate Control S ...

Manual Lumbar
Manual Lumbar If equipped, increase or decrease manual lumbar support by turning the knob forward or rearward. ...