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The 2012 GMC Sierra sports a new four-bar grille and offers heated and cooling seats on the SLT trim. StabilitTrak stability control gains Trailer Sway Control and hill start assist, while cruise control is made standard on the Work Truck. The 2012 GMC Sierra Denali truck gains heated and cooling front seats, a heated steering wheel and a rear backup camera.
The 4.8-liter, 5.3-liter and 6.2-liter V8 engines are now E85 Flex-Fuel compatible; the 4.8- and 5.3-liter engines also gain variable valve timing. New standard features on all 1500 models include side-curtain and front seat-mounted side-impact airbags as well as StabiliTrak stability control. New available features include a USB port on all but the base radio, a six-speed automatic transmission on Regular and Extended Cab models with the 5.3-liter engine and greater availability of the rear backup camera option.
All Sierra's benefit from enhancements to the OnStar and XM NavTracffic systems, while models fitted with the 5.3-, 6.0- and 6.2-liter engines gain a new six-speed automatic transmission. An E85-compatible 6.2-liter V8 is also now available on SLT and Denali trims.