2012 GMC Sierra 2500HD Denali

Air cleaner, high-capacity
Engine, Vortec 6.0L Variable Valve Timing V8 SFI E85-compatible, FlexFuel capable of running on unleaded or up to 85% ethanol (360 hp [268.4 kW] @ 5400 rpm, 380 lb-ft of torque [513.0 N-m] @ 4200 rpm)
Transfer case, electronic shift with rotary dial controls (Requires 4WD models)
Differential, heavy-duty automatic locking rear
Alternator, 125 amps
Steering, power
Frame, fully-boxed, hydroformed front section
Skid Plate Package includes front underbody shield starting behind front bumper and running to first cross-member, protecting front underbody, oil pan, differential case and transfer case, frame-mounted shields
Cooling, external engine oil cooler heavy-duty air-to-oil, integral to driver side of radiator tank
Battery, heavy-duty 600 cold-cranking amps, maintenance-free with rundown protection and retained accessory power
Four wheel drive
Suspension, front independent, torsion bar
Brakes, 4-wheel antilock, 4-wheel disc
Suspension Package, Handling/Trailering, heavy-duty includes 35mm twin tube shock absorbers and 36mm front stabilizer bar
Rear axle, 3.73 ratio
Pickup box, Wideside
Trailer brake controller, integrated
SAFETY
Daytime Running Lamps with automatic exterior lamp control
OnStar, 6 months of Directions and Connections plan includes Automatic Crash Response, Emergency Services, Crisis Assist, Stolen Vehicle Assistance including Remote Ignition Block, Remote Door Unlock (requires power locks), Turn-by-Turn Navigation with Destination Download (requires navigation radio) and OnStar eNav (where available), OnStar Vehicle Diagnostics, Roadside Assistance, Remote Horn and Lights, and Hands Free Calling. (Also includes Stolen Vehicle Slowdown when (LML) or (LGH) Duramax 6.6L Turbo Diesel V8 engine is not ordered. Not available with a ship-to of Puerto Rico or the Virgin Islands. Visit onstar.com for details and system limitations.)
Air bags, seat-mounted side-impact, driver and right-front passenger for thorax and pelvic protection (Always use safety belts and the correct child restraints for your child's age and size, even in vehicles equipped with air bags. Children are safer when properly secured in a rear seat in the appropriate infant, child or booster seat. See the Owner's Manual and child safety seat instructions for more safety information.)
OnStar Turn-by-Turn Navigation
Air bags, frontal, driver and right-front passenger (Always use safety belts and the correct child restraints for your child's age and size, even in vehicles equipped with air bags. Children are safer when properly secured in a rear seat in the appropriate infant, child or booster seat. See the Owner's Manual and child safety seat instructions for more safety information.)
Automatic Crash Response
Rear Vision Camera (Note: images appear on Navigation screen for units equipped with (UYS) AM/FM stereo with MP3 compatible CD/DVD player and navigation. For units not equipped with Navigation systems images will appear within rearview mirror.)
OnStar, 6 months of Directions and Connections plan includes Automatic Crash Response, Emergency Services, Crisis Assist, Stolen Vehicle Assistance including Remote Ignition Block, Remote Door Unlock (requires power locks), Turn-by-Turn Navigation with Destination Download (requires navigation radio) and OnStar eNav (where available), OnStar Vehicle Diagnostics, Roadside Assistance, Remote Horn and Lights, and Hands Free Calling. (Also includes Stolen Vehicle Slowdown when (LML) Duramax 6.6L Turbo Diesel V8 engine is not ordered. Not available with a ship-to of Puerto Rico or the Virgin Islands. Visit onstar.com for details and system limitations.)
Door locks, rear child security
Stolen Vehicle Assistance
Tire Pressure Monitoring System (does not apply to spare tire)
Rear Parking Assist, Ultrasonic with audible warning
StabiliTrak, stability control system with Proactive Roll Avoidance and traction control includes electronic trailer sway control and hill start assist
Tire Pressure Monitor System (does not apply to spare tire)
Air bags, head curtain side-impact front and rear outboard seating positions with rollover sensor (Head curtain side air bags are designed to help reduce the risk of head and neck injuries to front and rear seat outboard occupants on the near side of certain side-impact collisions. Always use safety belts and the correct child restraints for your child's age and size, even in vehicles equipped with air bags. Children are safer when properly secured in a rear seat in the appropriate infant, child or booster seat. See the Owner's Manual and child safety seat instructions for more safety information.)