Redesigned in 2020, the 2021 GMC Sierra 2500 HD features a bold exterior, updated powertrains, with increased payload and tow ratings, and a newly designed interior.
NEW for 2021
- Jack-knife alert
- Trailer-length indicator
- Multi-pro tailgate is now standard on the SLE trim level
- High-definition 360-degree camera and bed-view camera – Denali trim
- New Diamond Edition* – Denali trim
- Mud-terrain tires and a high-clearance step accessory – AT4 off-road trim
*Black Diamond Edition – power sunroof, power-retractable assist steps with LED perimeter lighting, 6.6L Duramax Turbo-Diesel V8 with Allison 10-speed automatic transmission, Auxiliary Trailer Camera, MultiPro Audio System, Premium all-weather floor liners with removable carpet inserts, Ebony Twilight Metallic Exterior paint, Unique 20” high-gloss black painted aluminum wheels, and Trailer Tire Pressure Monitor Sensors.
TRIMS/PRICING
- Sierra – starting price $37,795
- SLE – starting price $44,595
- SLT – starting price $52,595
- AT4 – starting price $59,995
- Denali – starting price $68,495
EXTERIOR
The Sierra 2500 HD comes in 2WD and 4WD Crew Cab and Double Cab models, with a 6’9” standard bed or available 8’ long bed that is standard in the Regular Cab. Sierra’s bold design is shown in its sculpted headlamps, prominent hood, and distinctive grilles.
- All Sierra Heavy Duty models are equipped with trailering mirrors
- Standard Side Bed Step is conveniently located just in front of the rear wheel arches
- LED headlamps (high-intensity on SLT, AT4 and Denali), taillamps, and daytime running lamps
AT4 features a bold, athletic look and precise detailing
- Available AT4 High Clearance Step
- Exclusive Exterior Styling
- Vertical Red Recovery Hooks
- Mud-terrain tires
Denali:
- Signature Denali Grille
- Chrome 6” Assist Steps
- Chrome Vertical Front Recovery Hooks
- Dual-Path Air Induction System with Diesel Engine
- High-definition 360-degree camera
- Standard 20” Multi-Dimensional Polished Aluminum Wheels
- MultiPro Tailgate with Push Button Panel and Hitch Area Light (SLT trim also)
- Available MultiPro Audio system by Kicker is designed to integrate into the MultiPro Tailgate. This 10-watt exterior audio system has full Bluetooth streaming capability.
INTERIOR
Convenient and spacious storage solutions include a lighted center console storage with available lockable console vault accessory, rear seat back storage, and rear-folding split bench with under-seat storage (Crew Cab).
The Sierra has a roomy interior with high quality materials, extra-wide beds, and handy built-in steps for easy access, as well as 12 cargo tie-downs. It seats five comfortably and offers plenty of head- and legroom, with crew models providing nearly three inches of additional rear-seat legroom.
Interior color:
- SLE/SLT – Dark Walnut/Slate Perforated front leather-appointed seating
- SLT Crew Cab – Jet Black front leather-appointed seating
- Denali Crew Cab– Jet Black or Dark Walnut/Dark Ash Grey Forge leather-appointed seating
- AT4 Crew– Jet Black Perforated front leather-appointed seating with Kalahari interior
- Available leather-wrapped heated steering wheel
- Available heated and ventilated leather-appointed front seats
- Available HVAC system with dual-zone climate control and rear-seat outlets
- Available heated rear outboard seats
SAFETY
The Sierra 2500 HD offers smart driver assistance technology, though none of it is standard. It is equipped with a comprehensive camera system that features up to 15 different viewing modes, including a transparent mode that allows the user to virtually see through an attached trailer as if it wasn’t there. Available key safety features include, forward-collision warning and automated emergency braking, blind-spot monitor and rear cross-traffic alert, and available lane-departure warning.
TECHNOLOGY
Every Sierra HD has a standard 8.0-inch touchscreen infotainment system with Apple CarPlay and Android Auto. A larger touchscreen can be upgraded with built-in navigation, a Bose audio system, *Sirius XM with 360L and satellite radio, **Amazon Alexa Built-In, and a rear-seat entertainment system. GMC also offers a smartphone app that can be used to remotely control trailer functions. Also, the infotainment system allows users to store different trailer profiles to monitor maintenance.
*Sirius XM with 360L - you get a variety of premium content including 200 + channels, plus On Demand shows, performances, talk entertainment, original programming, artist-dedicated channels and more.
**Amazon Alexa Built-In – hands free access to music, directions, calls, news, weather and more.
PERFORMANCE
The Sierra comes standard with a gas-powered 6.6-liter V-8 that makes 401 hp and 464 lb-ft of torque. It comes with a six-speed automatic transmission and rear- or all-wheel drive. An optional Duramax diesel 6.6-liter V8 will give you 445 hp and 910 lb-ft of torque and comes with an Allison 10-speed automatic transmission. Both engines are confident and propel the truck easily, but the diesel engine is more confident with a trailer attached.
Towing:
- Up to 18,500 pounds of towing and 3979 pounds of payload
Fuel:
WARRANTY
- Limited warranty covers three years or 36,000 miles
- Powertrain warranty covers five years or 60,000 miles
- Complimentary maintenance is covered for the first visit
CONCLUSION
The 2021 GMC Sierra 2500 HD provides incredible performance and trailering capabilities. It features an array of technology features, though many are not standard; but overall, it is a solid heavy-duty truck with a price tag that competes with many competitors.