2011 GMC Sierra 1500 Denali

Brakes, 4-wheel antilock, 4-wheel disc
Tools, mechanical jack and wheel wrench located in back of cab
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
Pickup box, Wideside
Cooling auxiliary external transmission oil cooler, heavy-duty air-to-oil
Cooling, external engine oil cooler heavy-duty air-to-oil, integral to driver side of radiator tank
Heavy Duty Cooling Package, heavy-duty includes (KC4) external engine oil cooler, (KNP) auxiliary external transmission oil cooler, electric fan and heavy-duty radiator
Transmission, 6-speed automatic, heavy-duty, electronically controlled with overdrive and tow/haul mode
Suspension Package, High-Performance includes 36mm front stabilizer bar
Exhaust, aluminized stainless-steel muffler and tailpipe
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
Alternator, 145 amps
Engine, Vortec 6.2L Variable Valve Timing V8 SFI E85- compatible, FlexFuel capable of running on unleaded or up to 85% ethanol (403 hp [300.5 kW] @ 5700 rpm, 417 lb-ft of torque [565.4 N-m] @ 4300 rpm)
Suspension, rear 2-stage multi-leaf springs, semi-elliptic
PACKAGE
Trailering Package, heavy-duty includes trailering hitch platform, 7-wire harness (harness includes wires for: park lamps, backup lamps, right turn, left turn, electric brake lead, battery and ground) with independent fused trailering circuits mated to a 7-way sealed connector and instrument panel jumper wiring harness for electric trailer brake controller
SAFETY
Automatic Crash Response
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. (Not available with a ship-to of Puerto Rico or the Virgin Islands. Visit onstar.com for details and system limitations.)
Rear Parking Assist, Ultrasonic with audible warning
StabiliTrak, stability control system with Proactive Roll Avoidance, includes electronic trailer sway control, intelligent brake assist and hill start assist
Daytime Running Lamps with automatic exterior lamp control
Door locks, rear child security. (Crew Cab models only.)
Tire Pressure Monitor System (does not apply to spare tire)
Air bags, frontal, driver and right-front passenger with Passenger Sensing System (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
Stolen Vehicle Assistance
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.)
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.)