Highlights of this 2021 GMC Sierra 2500HD include: GREAT MILES 33,270! WAS $51,000. Satellite Radio, Running Boards, Back-Up Camera, 4x4, Turbo, Alloy Wheels, X31 OFF-ROAD PACKAGE, ENGINE, DURAMAX 6.6L TURBO-DIESEL V8, B20-DIESEL COMPATIBLE, SLE CONVENIENCE PACKAGE, TRANSMISSION, ALLISON 10-SPEED AUTOMA. ENGINE, DURAMAX 6.6L TURBO-DIESEL V8. AUDIO SYSTEM, GMC INFOTAINMENT SYSTEM. Tow Hitch.
SERVICE WORK COMPLETED
Service Work completed on this GMC Sierra 2500HD includes: Complete Multi-Point Inspection, Oil & Filter Change by a Factory Trained Technician, Battery Voltage Test, Tires Inspected, Brake Inspection, Emissions System Check, Professional Detailed Inside and Out, Function Test all Lights, Check the Complete Exhaust System, Cooling System Inspection, Transmission Fluid Inspection, Differential Fluid Inspection, Function Test all Options & Accessories.
WHY BUY FROM US
We are proud to be the 17th member of the Colonial Automotive Group which has been proudly serving eastern Massachusetts since 1992. The Colonial Automotive Group takes great pride in providing exception customer service, before, during and after the sale. We have the best selection, best service, best prices and best reputation. Yes, you can have it all at Colonial!
OPTION PACKAGES
B20-DIESEL COMPATIBLE (445 hp [332 kW] @ 2800 rpm, 910 lb-ft of torque [1220 Nm] @ 1600 rpm) (Includes (K05) engine block heater.), SLE CONVENIENCE PACKAGE includes (CJ2) dual climate control, (A2X) 10-way power driver seat including power lumbar, (KA1) heated driver and passenger seats, (KI3) heated steering wheel, (N37) manual tilt/telescoping steering column, (C49) rear-window defogger, (ATH) Keyless Open and Start, (N06) Steering column lock, (BTV) Remote Start, (UTJ) content theft alarm, (USS) 2 charge-only USB ports for second row, (UF2) cargo bed LED lighting, (T3U) fog lights, (U01) Roof Marker Lamps and (B1J) rear wheelhouse liners, X31 OFF-ROAD PACKAGE includes (JHD) Hill Descent Control, (NZZ) skid plates, Off-Road suspension, Twin-tube Rancho shocks and X31 hard badge Includes (QXT) LT265/70R17E all-terrain, blackwall tires. AUDIO SYSTEM, GMC INFOTAINMENT SYSTEM WITH 8 DIAGONAL COLOR TOUCH-SCREEN AM/FM stereo with seek-and-scan and digital clock, includes Bluetooth® streaming audio for music and select phones; featuring wired Android Auto® and Apple CarPlay® capability for compatible phones (STD), ALLISON 10-SPEED AUTOMATIC.
Used 2021 GMCSierra 2500HD SLE 4WD Reg Cab 142 4WD Reg Cab 142 8
- Diesel
Call Today (888) 452-4186
- Exterior Color
- Quicksilver Metallic
- Interior Color
- Jet Black
- Odometer
- 33,270 miles
- Transmission
- Automatic
- Drivetrain
- 4WD
- Engine
- 8
- VIN
- 1GT39MEY0MF312458
- Stock Number
- 25223D
GMC
Sierra 2500HD
Included Packages & Accessories
- 10-Speed A/T
- 4-Wheel Disc Brakes
- 6-Speed A/T
- 8 Cylinder Engine
- A/C
- A/T
- ABS
- Adjustable Steering Wheel
- Aluminum Wheels
- AM/FM Stereo
- Apple CarPlay
- Auxiliary Audio Input
- Back-Up Camera
- Bluetooth
- Climate Control
- Cloth Seats
- Conventional Spare Tire
- Cruise Control
- Daytime Running Lights
- Diesel Fuel
- Driver Air Bag
- Floor Mats
- Four Wheel Drive
- Front Head Air Bag
- Front Side Air Bag
- Gasoline Fuel
- Heated Mirrors
- Integrated Turn Signal Mirrors
- Keyless Entry
- Leather Steering Wheel
- Locking/Limited Slip Differential
- MP3 Player
- Multi-Zone A/C
- Passenger Air Bag
- Power Door Locks
- Power Mirror(s)
- Power Outlet
- Power Steering
- Power Windows
- Privacy Glass
- Rear Head Air Bag
- Running Boards/Side Steps
- Satellite Radio
- Security System
- Smart Device Integration
- Split Bench Seat
- Stability Control
- Steering Wheel Audio Controls
- Telematics
- Tire Pressure Monitor
- Tires - Front All-Season
- Tires - Front All-Terrain
- Tires - Rear All-Season
- Tires - Rear All-Terrain
- Tow Hitch
- Tow Hooks
- Traction Control
- Turbo/Supercharged
- WiFi Hotspot
Detailed Specifications
- 1st row curtain head airbags
- 4-wheel ABS Brakes
- ABS and Driveline Traction Control
- Audio System Premium Brand: GMC Infotainment System
- Audio controls on steering wheel
- Audio system memory card slot
- Auxilliary engine cooler
- Auxilliary transmission cooler
- Bluetooth wireless phone connectivity
- Braking Assist
- Chrome grille
- Clock : Digital
- Cloth seat upholstery
- Compass
- Cruise control
- Cruise controls on steering wheel
- Daytime running lights
- Dual illuminated vanity mirrors
- Dusk sensing headlights
- External temperature display
- Front Independent Suspension
- Front Stabilizer Bar : Bar
- Front Ventilated disc brakes
- Front reading lights
- Front split-bench
- Front suspension stabilizer bar
- Fuel Capacity: 36.0 gal.
- Fuel Type: Regular unleaded
- Headlights off auto delay
- Heated driver mirror
- Heated passenger mirror
- Independent front suspension classification
- Instrumentation: Low fuel level
- Leaf rear spring
- Leaf rear suspension
- Leather/metal-look steering wheel trim
- Machined aluminum rims
- Manual extendable trailer style exterior mirrors
- Manual front air conditioning
- Metal-look dash trim
- Overhead console: Mini
- Passenger Airbag
- Power remote driver mirror adjustment
- Power remote passenger mirror adjustment
- Power steering
- Power windows
- Privacy glass: Deep
- Remote activated exterior entry lights
- Remote power door locks
- Remote window operation
- Rigid axle rear suspension
- Short and long arm front suspension
- Side airbag
- Simulated wood/metal-look door trim
- SiriusXM AM/FM/Satellite Radio
- SiriusXM Satellite Radio(TM)
- Spare Tire Mount Location: Underbody w/crankdown
- Stability controll with anti-roll
- Steel spare wheel rim
- Suspension class: Regular
- Tachometer
- Tilt-adjustable steering wheel
- Tire Pressure Monitoring System: Tire specific
- Torsion bar front spring
- Total Number of Speakers: 2
- Trailer hitch
- Trip computer
- Turn signal in mirrors
- Urethane shift knob trim
- Variable intermittent front wipers
- Vehicle Emissions: LEV II
- Video Monitor Location: Front
- Wheel Diameter: 17
- Wheel Width: 7.5
Dealer Notes
KBB.com Consumer Reviews

Overall3.8Out of 5
- 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!…
Based on 13 consumer ratings for 2020–2026 models. | Privacy
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