Used 2021 GMC Sierra 2500HD for Sale near New Haven, CT

After a major revision in 2020, for 2021, the GMC Sierra 2500HD is essentially unchanged. The 2021 GMC Sierra is available in five trim levels: Pro, SLE, SLT, AT4, and Denali. The GMC Sierra 2500HD for 2021 comes standard with rear-wheel drive, and four-wheel drive is an optional upgrade. The 2500HD is also available in several cab and bed configurations, including Regular Cab Longbed, Double Cab Standard Bed, Double Cab Long Bed, Crew Cab Standard Bed and Crew Cab Long Bed. The AT4 and Denali trims are available exclusively with the two Crew Cab configurations. The GMC Sierra 2500HD lineup is powered by a standard 6.6-liter V8 gas engine, which provides 401 horsepower and 465 lb-ft of torque. That engine offers a maximum 3,979-pound payload capacity in the rear-wheel-drive Regular Cab configuration, and 14,500 pounds of towing capacity with a Class IV hitch, regardless of cab or bed configuration. With a gooseneck, that increases to 17,370 pounds. The gas engine utilizes a Hydra-Matic 6L90 transmission with six speeds. GMC offers the 2500HD with an optional 6.6-liter V8 Duramax Turbo-Diesel, which provides 445 horsepower and 910 lb-ft of torque. That engine provides a slightly reduced maximum payload capacity of 3,715 pounds in the rear-drive Regular Cab configuration. Towing increases to an 18,500 maximum with the Crew Cab towing a conventional trailer. Max capacity increases by 10 pounds with a Crew Cab towing a gooseneck trailer with a fifth wheel. The diesel engine requires the Allison 10L1000 10-speed automatic transmission. Safety equipment includes a Rear View Camera on Pro and SLE trim levels, with HD View standard on the SLT and optional on SLE. HD Surround Vision with two trailer view camera provisions is standard on the Denali trim, and available on both SLT and AT4. All trims, with the exception of the Sierra 2500HD Pro, include a standard MultiPro tailgate, a six-function tailgate that allows easier loading, unloading, and bed access The MultiPro tailgate is optional on the Pro trim. Bluetooth functionality is standard on all Sierra 2500HD trim levels, and Pro, SLE and SLT trims include an AM/FM stereo with six speakers. The Pro and SLE trims have wired Apple CarPlay and Android Auto capability, while the SLE, AT4, and Denali trims make Apple CarpPlay and Android Auto wireless. Both the SLE and the AT4 can be upgraded with a Bose audio system, while the Denali makes that system standard. Lane Departure Warning is available on SLE, SLT, and AT4, and standard on Denali. Front and rear park assist are optional on all trims except Denali, which makes that feature standard. If the vehicle senses an impending collision, Safety Seat Alert vibrates to warn drivers. That feature is optional on SLT and AT4, and standard on Denali. IntelliBeam automatic headlamps are standard on Denali and optional on SLE, SLT, and AT4. The 2021 GMC Sierra 2500HD starts at $40,895 for the Pro trim. The SLE starts at $46,195, SLT at $55,795, AT4 at $63,795, and the range-topping Denali at $70,296.