The 2021 GMC Sierra Heavy Duty enhances the trucks premium trims and includes an enhanced ProGrade trailering system with 15 available camera views, including a transparent trailer view to virtually see through a trailer in tow. Additional features include:
- HD Surround Vision
- Bed View technology
- Available smart trailer designed to integrate the iN∙Command control system to monitor and control select trailer functions via the myGMC mobile app
- Optional 15-in. diagonal head-up display offers trailering information such as vehicle speed, navigation information and inclinometer display for road grade
- Black Diamond Edition will include 20-inch high-gloss black wheels and new power-retractable assist steps
- Rear Camera Mirror option
- MultiPro six-function tailgate allows easier loading, unloading and bed access and is available standard on SLE
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