The 2023 GMC Sierra Heavy Duty combines trailering capability with technologies designed to provide customers with a world-class towing experience. An enhanced ProGrade Trailering system features up to 15 available camera views, including a transparent trailer view to virtually see through a trailer in tow. The Sierra HD includes signature lighting with prominent “light blades” that deliver LED illumination for the daytime running lamps. The six-function MultiPro Tailgate is available on all trim levels (Pro, SLE, SLT, AT4 and Denali). The Sierra HD Crew Cab’s interior has best-in-class front headroom and legroom.