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Highlights Polygon key standard features SAFETY + DRIVER ASSISTANCE + SECURITY Adaptive Cruise Control3 Embedded OnStar® hardware, includes 8 years of OnStar ... 1 Premium paint; additional charge. 2 Service varies with conditions and location. Requires active service plan. See ... 2025 GMC Sierra 3500 Heavy Duty Chassis Cab shown. GMC Sierra 3500 Heavy Duty Chassis Cab ,Cardinal Red1,,Coastal Dune1,,Downpour Metallic1,,Onyx Black1,,Sterling Metallic1,,,,Summit White,,Titanium R... NOTE: Exterior colors vary by trim level. See Order Guide for details. available models Pro 2WD or 4WD Regular Cab DRW 1SA Pro 2WD or 4WD Crew Cab DRW 1SA SLE 2WD or 4WD Regular Cab DRW 3SA SLE 2WD or 4WD ... GraphicLine Features based on Pro 2WD model with 1SA equipment group. exterior colors GraphicLine UP TO 1,230 LB. FT. MAX. TORQUE WITH AVAILABLE DIESEL ENGINE IN VEHICLE WI FI® HOTSPOT2 Capable STANDARD 10 SPEED Automatic Transmission GraphicLine GraphicLine 2027