Next Generation Sierra Heavy Duty | Engineered to Conquer: Prograde Trailering | GMC

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  • Published on:  Tuesday, October 15, 2019
  • Built with powerfully smart trailering technology the Next Generation Sierra Heavy Duty was engineered to conquer. GMC Chief Engineer Marissa West gives an in-depth look at Sierra Heavy Duty’s available ProGrade Trailering System and how it helps you tow with command and control.

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