Used 2021 GMCSierra 3500 HD AT4
- Diesel
- Exterior Color
- Pacific Blue
- Interior Color
- Jet Black
- Odometer
- 64,889 miles
- Transmission
- Automatic
- Drivetrain
- 4x4
- Engine
- V-8 cyl
- VIN
- 1GT49VEYXMF243627
- Stock Number
- N243627A
Included Packages & Accessories
- Upfitter Switch Kit
- Power-Retractable Black Assist Steps
- Pickup Bed
- Federal Emissions Requirements
- Dual 220-Amps Primary/170-Amps Aux Alternators
- Trailer Tire Pressure Monitor Sensors
- Wired Auxiliary Trailer Camera
- High Idle Switch
- Front License Plate Kit
- Black Front & Rear Molded Splash Guards
- Preferred Equipment Group 4SB
- Radio: AM/FM w/Premium GMC Infotainment System
- 6-Speaker Audio System Feature
- SiriusXM w/360L
- HD Radio
- Wireless Phone Projection
- Floor-Mounted Center Console
- Compass Located In Instrument Cluster
- 4.2" Diagonal Color Display Driver Info Center
- Electric Rear-Window Defogger
- Power Door Locks
- Remote Vehicle Starter System
- Keyless Open & Start
- Prem Front Floor Liners w/Removable Carpet Insert
- Prem Rear Floor Liners w/Removable Carpet Insert
- OnStar & GMC Connected Services Capable
- 4G LTE Wi-Fi Hotspot Capable
- GMC Connected Access Capable
- 12-Volt Rear Auxiliary Power Outlet
- 120-Volt Instrument Panel Power Outlet
- 120-Volt Bed Mounted Power Outlet
- 2 USB Ports
- 2 USB Ports Inside Console
- 2nd Row Dual USB Charge-Only Ports
- HD Rear Vision Camera
- Heated Driver & Front Outboard Passenger Seats
- Ventilated Driver & Front Passenger Seats
- Spray-On Pickup Bed Liner w/AT4 Logo
- 2nd Row Heated Outboard Seats
- Steering Wheel Audio Controls
- Manual Tilt-Wheel/Telescoping Steering Column
- Electrical Lock Control Steering Column
- Unauthorized Entry Theft-Deterrent System
- Deep-Tinted Glass
- Painted Blk Surround Grille w/High Gloss Blk Mesh
- Power Front Windows w/Driver Express Up/Down
- Power Front Passenger Windows w/Express Up/Down
- Power Rear Windows w/Express Down
- LED Cargo Area Lighting
- Red Recovery Hooks
- Wheels: 18" Machined Aluminum
- Rear Wheelhouse Liners
- X31 Off-Road Package
- Hill Descent Control
- Skid Plates
- Off-Road Suspension
- Integrated Trailer Brake Controller
- ProGrade Trailering System
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering System App
- 2-Speed Active Transfer Case
- 10-Way Power Driver Seat Adjuster w/Lumbar
- Driver Memory
- Power Sliding Rear Window w/Defogger
- Front Bucket Seats
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- Winter Grille Cover
- Power Sunroof
- Gooseneck/5th Wheel Package
- Gooseneck/5th Wheel Prep Package
- Bed View Camera w/2 Trailer Camera Provisions
- Technology Package
- Auto-Dimming Inside Rearview Mirror w/Camera
- Multicolor 15" Diagonal Head-Up Display
- 8" Driver Information Center
- GVWR: 12,100 lbs
- 3.42 Rear Axle Ratio
- Safety Alert Seat
- Radio: AM/FM w/Prem GMC Infotainment System & Navi
- Engine Block Heater
- Exhaust Brake
- Wireless Charging
- Engine: Duramax 6.6L Turbo-Diesel V8
- 220 Amp Alternator
- Transmission: Allison 10-Speed Automatic
- Dual Heavy-Duty 70 Amp Battery
- Capped Fuel Fill
- AT4 Premium Plus Package
- AT4 Preferred Package
- HD Surround Vision w/2 Trailer View Camera Provisions
- Universal Home Remote
- Bose Premium 7 Speaker Sound System
- LED Smoked Amber Roof Marker Lamps
- Driver Alert Package I
- Ultrasonic Front & Rear Park Assist
- Lane Change Alert w/Side Blind Zone Alert
- Rear Cross Traffic Alert
- Perimeter Lighting
- Driver Alert Package II
- Forward Collision Alert
- Lane Departure Warning
- Automatic Emergency Braking
- IntelliBeam Automatic High Beam On/Off
- Following Distance Indicator
- Wheels: 20" Machined Aluminum
- AT4 High Clearance Step
- Wheels: 20" Transit Aluminum
- Tires: LT275/65R20 AT BW
- Spare LT275/70R18 AT BW Tire
- Wheels: 20" High Gloss Black Aluminum
- Wheel Locks
Included Packages & Options
- Engine: Duramax 6.6L Turbo-Diesel V8$9,890
- 220 Amp Alternator
- Transmission: Allison 10-Speed Automatic
- GVWR: 12,100 lbs
- 3.42 Rear Axle Ratio
- Dual Heavy-Duty 70 Amp Battery
- Winter Grille Cover
- Exhaust Brake
- Engine Block Heater
- Capped Fuel Fill
- Wheels: 20" High Gloss Black Aluminum$2,995
- Wheels: 20" Transit Aluminum
- Wheel Locks
- Technology Package$1,275
- Auto-Dimming Inside Rearview Mirror w/Camera
- Multicolor 15" Diagonal Head-Up Display
- 8" Driver Information Center
- Driver Alert Package I$890
- Ultrasonic Front & Rear Park Assist
- Lane Change Alert w/Side Blind Zone Alert
- Rear Cross Traffic Alert
- Perimeter Lighting
- Driver Alert Package II$645
- Forward Collision Alert
- Lane Departure Warning
- Automatic Emergency Braking
- IntelliBeam Automatic High Beam On/Off
- Following Distance Indicator
- Safety Alert Seat
- Tires: LT275/65R20 AT BW$200
- Spare LT275/70R18 AT BW Tire
- Upfitter Switch Kit$150
- Power-Retractable Black Assist Steps$1,895
- Dual 220-Amps Primary/170-Amps Aux Alternators$380
- Trailer Tire Pressure Monitor Sensors$50
- Wired Auxiliary Trailer Camera$595
- High Idle Switch$200
- Black Front & Rear Molded Splash Guards$190
Detailed Specifications
- Max seating capacity: 5
- Fuel System: Direct Injection
- Fuel tank capacity: 36 gal
- Horsepower: 445
Standard Features
- 220 Amp Alternator
- Transmission: Allison 10-Speed Automatic
- GVWR: 12,100 lbs
- 3.42 Rear Axle Ratio
- Dual Heavy-Duty 70 Amp Battery
- Winter Grille Cover
- Exhaust Brake
- Engine Block Heater
- Capped Fuel Fill
- Wheels: 20" Transit Aluminum
- Wheel Locks
- Auto-Dimming Inside Rearview Mirror w/Camera
- Multicolor 15" Diagonal Head-Up Display
- 8" Driver Information Center
- Ultrasonic Front & Rear Park Assist
- Lane Change Alert w/Side Blind Zone Alert
- Rear Cross Traffic Alert
- Perimeter Lighting
- Forward Collision Alert
- Lane Departure Warning
- Automatic Emergency Braking
- IntelliBeam Automatic High Beam On/Off
- Following Distance Indicator
- Safety Alert Seat
- Spare LT275/70R18 AT BW Tire
- 10-Way Power Driver Seat Adjuster w/Lumbar
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- Driver Memory
- Heated Driver & Front Outboard Passenger Seats
- Ventilated Driver & Front Passenger Seats
- 2nd Row Heated Outboard Seats
- Floor-Mounted Center Console
- Hill Descent Control
- Skid Plates
- Off-Road Suspension
- Hitch Guidance w/Hitch View
- 6-Speaker Audio System Feature
- SiriusXM w/360L
- HD Radio
- Radio: AM/FM w/Premium GMC Infotainment System
- Wireless Phone Projection
- Floor-Mounted Center Console
- Compass Located In Instrument Cluster
- 4.2" Diagonal Color Display Driver Info Center
- Electric Rear-Window Defogger
- Power Door Locks
- Remote Vehicle Starter System
- Keyless Open & Start
- Prem Front Floor Liners w/Removable Carpet Insert
- Prem Rear Floor Liners w/Removable Carpet Insert
- OnStar & GMC Connected Services Capable
- 4G LTE Wi-Fi Hotspot Capable
- GMC Connected Access Capable
- 12-Volt Rear Auxiliary Power Outlet
- 120-Volt Instrument Panel Power Outlet
- 120-Volt Bed Mounted Power Outlet
- 2 USB Ports
- 2 USB Ports Inside Console
- 2nd Row Dual USB Charge-Only Ports
- HD Rear Vision Camera
- Heated Driver & Front Outboard Passenger Seats
- Ventilated Driver & Front Passenger Seats
- Spray-On Pickup Bed Liner w/AT4 Logo
- 2nd Row Heated Outboard Seats
- Steering Wheel Audio Controls
- Manual Tilt-Wheel/Telescoping Steering Column
- Electrical Lock Control Steering Column
- Unauthorized Entry Theft-Deterrent System
- Deep-Tinted Glass
- Painted Blk Surround Grille w/High Gloss Blk Mesh
- Power Front Windows w/Driver Express Up/Down
- Power Front Passenger Windows w/Express Up/Down
- Power Rear Windows w/Express Down
- LED Cargo Area Lighting
- Red Recovery Hooks
- Wheels: 18" Machined Aluminum
- Rear Wheelhouse Liners
- X31 Off-Road Package
- Integrated Trailer Brake Controller
- ProGrade Trailering System
- 2-Speed Active Transfer Case
- Gooseneck/5th Wheel Prep Package
- Bed View Camera w/2 Trailer Camera Provisions
- AT4 Preferred Package
- Driver Alert Package I
- Driver Alert Package II
- Wheels: 20" Machined Aluminum
- Power Sunroof
- Technology Package
- AT4 High Clearance Step
- Bed View Camera w/2 Trailer Camera Provisions
- HD Surround Vision w/2 Trailer View Camera Provisions
- Universal Home Remote
- Power Sliding Rear Window w/Defogger
- Radio: AM/FM w/Prem GMC Infotainment System & Navi
- Bose Premium 7 Speaker Sound System
- LED Smoked Amber Roof Marker Lamps
- Wireless Charging
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering System App
Dealer Notes
KBB.com Consumer Reviews

- 5.0
2020 GMC Denali 3500 HD Duramax is a BEAST!
By Merlinsmerc | on Friday, January 22, 2021
Pulling a conventional 10,000 lb trailer over mountain passes is a whole new experience. Staying at the speed limit up long steep grades did not change the engine temperature. I feathered the accelerator up the mountain. The new 10 speed transmission is so smooth you cant feel it changing gears. This is my second GMC Denali Duramax, first being a 2016. I debated trading in for over a year, and am so happy I made the trade. Trailers always exceed by far the tongue weight posted on them, and in my case it came in at 1450 lbs. That exceeded my trucks posted maximum. The 2020 dually posts a 2,000 lb tongue weight, so now I can front load the trailer, and that reduces sway. If you can afford it, and have a heavy trailer, buy the truck!… - 5.0
Love our truck
By Ron | on Friday, December 11, 2020
The truck doesn’t have a sun roof which it was suppose to have… - 2.0
In shop for 13 weeks so far!
By Whip | on Monday, September 09, 2024
My truck has been in the shop for 13 weeks to this point with no end in sight. The Infotainment panel blew out which controls pretty much everything. Nice truck except if something goes wrong then, good luck! I would recommend looking at Fords and Rams and ask the question, how many vehicles do you have in your shop waiting for parts and for how long. I heard of one at my GMC dealership that has been waiting for 8 months! Only thing I get from GM is "we understand your frustration". Apparently they don't, or I would have my truck back long ago.…
Disclaimer
- Maroone Price
- $55,998
- We're here to help: (719) 249-2703
Certified Pre-Owned GMC Trucks and SUVs Available at Mike Maroone GMC
At Mike Maroone GMC in Boulder, CO, investing in a certified pre-owned GMC vehicle is a wise choice. Each vehicle undergoes rigorous inspections to ensure functionality and value. If you're looking for a GMC truck near Broomfield, CO, or Longmont, CO, our current inventory of certified pre-owned vehicles is the perfect place to start your search.
In addition to our certified pre-owned inventory, we offer a wide selection of quality used vehicles. However, nothing beats the dependability and assurance of our certified pre-owned GMC inventory, which is highly sought after in Boulder, CO.
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GMC's lineup includes both SUVs and trucks, and at Mike Maroone GMC, you might find models such as the Acadia, Yukon, Terrain, Sierra 1500, Sierra 2500, Sierra 3500, and Canyon. With multiple trim levels and occasional custom-ordered models, our selection caters to a wide range of preferences in Louisville, CO.
We welcome you to explore our inventory online or visit us in person at Mike Maroone GMC in Boulder, CO. While our online inventory provides a great start, visiting our dealership allows you to see more options, including vehicles not listed online. Our team is ready to show you similar vehicles to your online selections or guide you through our lot.
Experience our certified pre-owned GMC vehicles firsthand with a test drive. This is the best way to determine which vehicle suits you best. For financing options, visit our financing page, and check out our used inventory for more choices. Mike Maroone GMC in Boulder, CO, is committed to helping you find the ideal certified pre-owned vehicle.
- We're here to help: (719) 249-2703





