Used 2021 GMCSierra 2500 HD Denali
- Exterior Color
- Ebony Twilight
- Interior Color
- JET BLACK, FORGE PERFORATED LEATHER SEAT TRIM
- Odometer
- 94,530 miles
- Transmission
- Automatic
- Drivetrain
- 4x4
- Engine
- V-8 cyl
- VIN
- 1GT49REY8MF152735
- Stock Number
- P152735
Included Packages & Accessories
- GMC MultiPro Tailgate Step Lights
- Pickup Box
- Federal Emissions Requirements
- Wired Auxiliary Trailer Camera
- Dual 220-Amps Primary/170-Amps Aux Alternators
- Tires: LT275/65R20 AT BW
- High Idle Switch
- 5th Wheel & Gooseneck Trailer Wiring Provisions
- Front License Plate Kit
- Preferred Equipment Group 5SA
- Driver Alert Package I
- Ultrasonic Front & Rear Park Assist
- Lane Change Alert w/Side Blind Zone Alert
- Rear Cross Traffic Alert
- Driver Alert Package II
- Forward Collision Alert
- Lane Departure Warning
- Automatic Emergency Braking
- IntelliBeam Automatic High Beam On/Off
- Following Distance Indicator
- Safety Alert Seat
- Radio: Premium GMC Infotainment Sys w/Navigation
- Bose Premium 7 Speaker Sound System
- SiriusXM w/360L
- HD Radio
- Wireless Phone Projection
- Floor-Mounted Center Console
- Compass Located In Instrument Cluster
- Electric Rear-Window Defogger
- Power Door Locks
- Remote Vehicle Starter System
- Keyless Open & Start
- 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
- 2nd Row Dual USB Charge-Only Ports
- Bed View Camera w/2 Trailer Camera Provisions
- HD Surround Vision
- Spray-On Pickup Box Bed Liner w/Denali Logo
- 6" Rectangular Chromed Tubular Assist Steps
- Heated Driver & Front Outboard Passenger Seats
- Heated & Ventilated Front Bucket Seats
- Heated 2nd Row Outboard Seats
- Steering Wheel Audio Controls
- Manual Tilt-Wheel/Telescoping Steering Column
- Electrical Lock Control Steering Column
- Unauthorized Entry Theft-Deterrent System
- Universal Home Remote
- Deep-Tinted Glass
- Signature Denali Grille
- Power Sliding Rear Window w/Defogger
- Power Windows w/Driver Express Up/Down
- Power Front Passenger Windows w/Express Up/Down
- Power Rear Windows w/Express Down
- Wireless Charging
- LED Smoked Amber Roof Marker Lamps
- LED Cargo Area Lighting
- Rear Wheelhouse Liners
- Chrome Recovery Hooks
- Polished Exhaust Tip
- X31 Off-Road Package
- Off-Road Suspension
- Hill Descent Control
- Skid Plates
- Integrated Trailer Brake Controller
- ProGrade Trailering System
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering System App
- Engine: 6.6L V8 w/Direct Injection & VVT
- Heavy-Duty 80 Amp Battery
- GVWR: 10,650 lbs
- 2-Speed Active Transfer Case
- 10-Way Power Driver Seat Adjuster w/Lumbar
- Driver Memory
- Front Bucket Seats
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- Winter Grille Cover
- Rear Prem Floor Liners w/Removable Carpet Insert
- Front Prem Floor Liners w/Removable Carpet Insert
- Power Retractable Assist Steps
- Power Sunroof
- Technology Package
- Inside Rearview Auto-Dimming Rear Camera Mirror
- Multicolor 15" Diagonal Head-Up Display
- 3.42 Axle Ratio
- GVWR: 11,300 lbs
- Denali Black Diamond Edition
- MultiPro Audio System by Kicker
- Trailer Tire Pressure Monitor Sensors
- Wheels: 20" High Gloss Black Painted Aluminum
- Engine Block Heater
- Exhaust Brake
- Engine: Duramax 6.6L Turbo-Diesel V8
- Capped Fuel Fill
- 220 Amps Alternator
- Dual Heavy-Duty 70 Amp Battery
- Transmission: Allison 10-Speed Automatic
- Denali Ultimate Package
Included Packages & Options
- Engine: Duramax 6.6L Turbo-Diesel V8$9,750
- Capped Fuel Fill
- 220 Amps Alternator
- Dual Heavy-Duty 70 Amp Battery
- Winter Grille Cover
- Exhaust Brake
- Engine Block Heater
- GVWR: 11,300 lbs
- 3.42 Axle Ratio
- Transmission: Allison 10-Speed Automatic
- Denali Ultimate Package$2,270
- Technology Package
- Power Sunroof
- Technology Package$1,475
- Inside Rearview Auto-Dimming Rear Camera Mirror
- Multicolor 15" Diagonal Head-Up Display
- Front Prem Floor Liners w/Removable Carpet Insert$130
- Rear Prem Floor Liners w/Removable Carpet Insert
- GMC MultiPro Tailgate Step Lights$200
- Wired Auxiliary Trailer Camera$595
- Dual 220-Amps Primary/170-Amps Aux Alternators$380
- High Idle Switch$200
- 5th Wheel & Gooseneck Trailer Wiring Provisions$35
Detailed Specifications
- Max seating capacity: 5
- Fuel System: Direct Injection
- Fuel tank capacity: 36 gal
- Horsepower: 445
Standard Features
- Capped Fuel Fill
- 220 Amps Alternator
- Dual Heavy-Duty 70 Amp Battery
- Winter Grille Cover
- Exhaust Brake
- Engine Block Heater
- GVWR: 11,300 lbs
- 3.42 Axle Ratio
- Transmission: Allison 10-Speed Automatic
- Technology Package
- Power Sunroof
- Inside Rearview Auto-Dimming Rear Camera Mirror
- Multicolor 15" Diagonal Head-Up Display
- Rear Prem Floor Liners w/Removable Carpet Insert
- Forward Collision Alert
- Lane Departure Warning
- Automatic Emergency Braking
- IntelliBeam Automatic High Beam On/Off
- Following Distance Indicator
- Bose Premium 7 Speaker Sound System
- SiriusXM w/360L
- HD Radio
- 4G LTE Wi-Fi Hotspot Capable
- GMC Connected Access Capable
- 10-Way Power Driver Seat Adjuster w/Lumbar
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- Driver Memory
- Off-Road Suspension
- Hill Descent Control
- Skid Plates
- Driver Alert Package I
- Driver Alert Package II
- Safety Alert Seat
- Radio: Premium GMC Infotainment Sys w/Navigation
- Wireless Phone Projection
- Floor-Mounted Center Console
- Compass Located In Instrument Cluster
- Electric Rear-Window Defogger
- Power Door Locks
- Remote Vehicle Starter System
- Keyless Open & Start
- OnStar & GMC Connected Services Capable
- 12-Volt Rear Auxiliary Power Outlet
- 120-Volt Instrument Panel Power Outlet
- 120-Volt Bed Mounted Power Outlet
- 2 USB Ports
- 2nd Row Dual USB Charge-Only Ports
- Bed View Camera w/2 Trailer Camera Provisions
- HD Surround Vision
- Spray-On Pickup Box Bed Liner w/Denali Logo
- 6" Rectangular Chromed Tubular Assist Steps
- Heated Driver & Front Outboard Passenger Seats
- Heated & Ventilated Front Bucket Seats
- Heated 2nd Row Outboard Seats
- Steering Wheel Audio Controls
- Manual Tilt-Wheel/Telescoping Steering Column
- Electrical Lock Control Steering Column
- Unauthorized Entry Theft-Deterrent System
- Universal Home Remote
- Deep-Tinted Glass
- Signature Denali Grille
- Power Sliding Rear Window w/Defogger
- Power Windows w/Driver Express Up/Down
- Power Front Passenger Windows w/Express Up/Down
- Power Rear Windows w/Express Down
- Wireless Charging
- LED Smoked Amber Roof Marker Lamps
- LED Cargo Area Lighting
- Rear Wheelhouse Liners
- Chrome Recovery Hooks
- Polished Exhaust Tip
- X31 Off-Road Package
- Integrated Trailer Brake Controller
- ProGrade Trailering System
- Engine: 6.6L V8 w/Direct Injection & VVT
- 2-Speed Active Transfer Case
- Ultrasonic Front & Rear Park Assist
- Lane Change Alert w/Side Blind Zone Alert
- Rear Cross Traffic Alert
- Heavy-Duty 80 Amp Battery
- GVWR: 10,650 lbs
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering System App
Dealer Notes
Recent Arrival! 10-Speed Automatic, 4WD, Jet Black Leather, 10-Way Power Driver Seat Adjuster w/Lumbar, 10-Way Power Passenger Seat Adjuster w/Lumbar, 12-Volt Rear Auxiliary Power Outlet, 120-Volt Bed Mounted Power Outlet, 120-Volt Instrument Panel Power Outlet, 2 USB Ports, 2 USB Ports (1st Row), 2-Speed Active Transfer Case, 2nd Row Dual USB Charge-Only Ports, 4-Wheel Disc Brakes, 4G LTE Wi-Fi Hotspot Capable, 5th Wheel & Gooseneck Trailer Wiring Provisions, 6 Rectangular Chromed Tubular Assist Steps, Air Conditioning, AM/FM radio: SiriusXM with 360L, Automatic Emergency Braking, Automatic temperature control, Bed View Camera w/2 Trailer Camera Provisions, Bose Premium 7 Speaker Sound System, Chrome Recovery Hooks, Compass Located In Instrument Cluster, Deep-Tinted Glass, Denali Black Diamond Edition, Denali Ultimate Package, Driver Alert Package I, Driver Alert Package II, Driver Memory, Dual front impact airbags, Dual front side impact airbags, Electric Rear-Window Defogger, Electrical Lock Control Steering Column, Electronic Stability Control, Exterior Parking Camera Rear, Floor-Mounted Center Console, Following Distance Indicator, Forward Collision Alert, Front dual zone A/C, Front Prem Floor Liners w/Removable Carpet Insert, Front wheel independent suspension, GMC Connected Access Capable, HD Radio, HD Surround Vision, Heated & Ventilated Front Bucket Seats, Heated 2nd Row Outboard Seats, Heated Driver & Front Outboard Passenger Seats, Hill Descent Control, Inside Rearview Auto-Dimming Rear Camera Mirror, Integrated Trailer Brake Controller, IntelliBeam Automatic High Beam On/Off, Keyless Open & Start, Lane Change Alert w/Side Blind Zone Alert, Lane Departure Warning System, LED Cargo Area Lighting, LED Smoked Amber Roof Marker Lamps, Manual Tilt-Wheel/Telescoping Steering Column, Multicolor 15 Diagonal Head-Up Display, MultiPro Audio System by Kicker, Navigation System, Occupant sensing airbag, Off-Road Suspension, OnStar & GMC Connected Services Capable, Overhead airbag, Polished Exhaust Tip, Power Door Locks, Power driver seat, Power Front Passenger Windows w/Express Up/Down, Power Rear Windows w/Express Down, Power Retractable Assist Steps, Power Sliding Rear Window w/Defogger, Power Sunroof, Power windows, Power Windows w/Driver Express Up/Down, Preferred Equipment Group 5SA, Radio: Premium GMC Infotainment Sys w/Navigation, Rear Cross Traffic Alert, Rear Prem Floor Liners w/Removable Carpet Insert, Rear Wheelhouse Liners, Rear window defroster, Remote keyless entry, Remote Vehicle Starter System, Safety Alert Seat, Signature Denali Grille, SiriusXM w/360L, Spray-On Pickup Box Bed Liner w/Denali Logo, Steering Wheel Audio Controls, Steering wheel mounted audio controls, Technology Package, Traction control, Trailer Tire Pressure Monitor Sensors, Ultrasonic Front & Rear Park Assist, Unauthorized Entry Theft-Deterrent System, Universal Home Remote, Ventilated front seats, Wheels: 20 High Gloss Black Painted Aluminum, Wired Auxiliary Trailer Camera (LPO), Wireless Charging, Wireless Phone Projection, X31 Off-Road Package.
GMC Dealership Serving Boulder, CO Drivers Mike Maroone GMC GMC Sales, Service, and Parts in Boulder, CO If you have been longing to get into a new GMC close to Boulder, CO, then right now is an ideal opportunity to find your next auto at a low cost, here at Mike Maroone GMC. Enjoy Free Delivery anywhere in Colorado. Our GMC Truck line is headed by the Sierra 1500, 2500 and 3500, each new GMC model can be found here at our Boulder, CO dealership. Discover your new GMC in Boulder now for a test spin of your dream car.
KBB.com Consumer Reviews

- 2.0
Transmission trash
By Jason | on Monday, April 07, 2025
Bought a 2023 GMC Duramax diesel Sierra SLT had it for two years hit 50,000 miles. The throttlebody broke went in for service. Got it back three weeks at 62,000 miles now my transmission is slipping. I travel back-and-forth from South Carolina to North Carolina for work daughter’s truck would be my forever truck. What a joke Hundred thousand dollar truck junk… - 3.0
Infotainment system unreliable!
By Brian C | on Friday, June 27, 2025
The servicing dealer has been great, the GM engineers not so much! The truck will without warning have no sound for the radio and the blinkers. GM told the dealership to reprogram then when that didn't work they said replace the amplifier and when that didn't work, they said replace a module, and when that didn't work they said to replace the amplifier again, and when that didn't work they said we know it's a known problem but we don't know how to fix it. All of this with less than 9k miles. The dealer has done everything that GM has asked them to do, but none of it works. It's very frustrating to pay this much for a truck and you can't get the radio to stay working. It also got away from the factory with paint damage and a dent in the hood,( the dent is from the inside out on a double wall). I thought I was upgrading when I went from a F250 Lariat to a Denali, but I may have traded one headache for another.… - 5.0
Fantastic truck
By Jjj | on Sunday, November 07, 2021
This one of the most solid vehicles that I have ever driven! The 401 hp engine is more than enough power and the transmission is smooth! Highly recommend this truck!…
Disclaimer
- Maroone Price
- $53,438
- We're here to help: (720) 713-6671
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.
Possible GMC Models on the Lot
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: (720) 713-6671

