Onyx Black 2015 GMC Sierra 3500HD Denali Driver Alert PackageDuramax Plus Package ($7,345 value)Duramax 6.6L Turbo Diesel V8 EngineAllison 1000 6-Speed Automatic Transmission with OverdrivePreferred Equipment Group 5SAPower WindowsPower Sliding Rear WindowRear 60/40 Folding Bench Seat (folds Up)Deep-Tinted GlassFront Full Feature Bucket SeatsRemote Keyless EntryRear Wheelhouse LinersColor-Keyed Carpeting Floor CoveringColor-Keyed Carpeted 1st and 2nd Row Floor MatsChrome Bodyside MoldingsRemote Vehicle Starter SystemElectric Rear-Window DefoggerDual-Zone Automatic Climate ControlAuto-Dimming Inside Rearview MirrorDriver and Front Passenger VisorsChrome Power-Adjustable Heated Outside MirrorsChrome Door HandlesAM/FM Stereo with 8'' Diagonal Color Touch NavigationPower Adjustable PedalsHeated and Cooled Driver and Front Passenger Seats150 Amps Alternator110-Volt AC Power OutletManual Tilt-Wheel/telescoping Steering ColumnElectronic Shift Transfer CaseEZ-Lift and Lower Tailgate18'' Chromed Aluminum WheelsLT265/70R18E AS BW TiresPerforated Leather-Appointed Seat TrimFront Halogen Fog LampsSingle-Slot CD/MP3 PlayerUltrasonic Front and Rear Park AssistOnStar 6 Months Directions/ConnectionsUniversal Home Remote8'' Enhanced Driver Instrument Information DisplaySteering Wheel Audio ControlsBose Speaker SystemUnauthorized Entry Theft-Deterrent SystemRear Vision Camera with Dynamic Guide LinesLeather Wrapped Heated Steering WheelFront Frame-Mounted Black Recovery HooksFront Body-Color BumperRear Body-Color Bumper with Bumper CornerstepsOnStar with 4G LTETrailering EquipmentSpare LT265/70R18E AS BW TireConvenience Cruise control with steering wheel mounted controls. Set it and forget it. Road trips used to be stressful, until cruise control set the pace. Simply set the desired speed using the steering wheel mounted controls and it will maintain that speed without driver intervention. This can help minimize driver fatigue and improve overall fuel economy. Resting your right foot is right at your fingertips thanks to cruise control with steering wheel mounted controls.Safety and Security Rear camera - Watching your back! The rear camera helps you see obstacles and hazards you otherwise couldn't by showing enhanced images of what is behind you. The rear camera is an extra set of eyes that's both convenient and safe. Brake assist - Stop right there. Something jumps out into the middle of the road and you need to stop now! With brake assist, you will. It uses the speed of the brake pedal's travel to sense panic braking, then applies all available power to boost your stopping power. Brake assist can stop the accident before it is one.Technology and Telematics Mobile hotspot - WiFi on the fly. Connect your devices to the Internet through your vehicle's private mobile hotspot and take the internet wherever your journey takes you, without eating up your data allowance. Find the hotspot with mobile hotspot. Mobile hotspot - WiFi on the fly. Connect your devices to the Internet thr