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    • GMC® Sierra Heavy Duty - Explore GMC® Sierra HD Trims

      https://www.gmc.com › Sierra-HD
      SponsoredThe GMC® Sierra Heavy Duty Offers Available Max Towing up to 36,000 LBS. Visit GMC.com. Offers More Advanced Trailering Assistance Technologies Than Any Competitor in Its Class.

      Build & Price · Allison Transmission  · Powerful Performance · Full Vehicle Gallery