Onyx Black 2021 GMC Sierra 1500 SLT 4WD 10-Speed Automatic EcoTec3 5.3L V8 Sierra 1500 SLT, 4D Crew Cab, EcoTec3 5.3L V8, 10-Speed Automatic, 4WD, Onyx Black, Jet Black w/Perf Leather-Appointed Front Outboard Seat Trim, 10-Way Power Driver Seat Adjuster w/Lumbar, 10-Way Power Passenger Seat Adjuster w/Lumbar, 12-Volt Rear Auxiliary Power Outlet, 120-Volt Bed Mounted Power Outlet, 120-Volt Instrument Panel Power Outlet, 170 Amp Alternator, 3.23 Rear Axle Ratio, 4G LTE Wi-Fi Hotspot Capable, 6-Speaker Audio System Feature, ABS brakes, Alloy wheels, AM/FM radio: SiriusXM with 360L, Automatic temperature control, Auxiliary External Transmission Oil Cooler, Driver Memory, Electric Rear-Window Defogger, Front 40/20/40 Split-Bench Seat, Front Frame-Mounted Black Recovery Hooks, Front wheel independent suspension, Fully automatic headlights, GMC Connected Access Capable, Heated Driver & Front Outboard Passenger Seating, Heated front seats, Heated steering wheel, Heavy Duty Suspension, Hitch Guidance, Illuminated entry, Low tire pressure warning, Occupant sensing airbag, OnStar & GMC Connected Services Capable, Perf Leather-Appointed Front Outboard Seat Trim, Power Front Passenger Windows w/Express Up/Down, Power windows, Premium audio system: GMC Infotainment System, Radio: Premium GMC Infotainment Sys w/Multi-Touch, Remote keyless entry, SiriusXM w/360L, Theft Deterrent System (Unauthorized Entry), Traction control, Trailering Package, Wheels: 18 x 8.5 6-Spoke Machined Aluminum.