Vehicle Details
Power meets purpose in this 2021 GMC Sierra 2500 SLE 4WD a rugged, reliable heavy-duty pickup with the stout V8 6.6L Duramax diesel that delivers torque and towing confidence for every job. Located in Mountain Home, ID, this GMC Sierra 2500 blends work-ready capability with modern tech and comfort, making it an ideal choice for contractors, ranchers, and outdoor enthusiasts who demand performance and value. Loaded with must-have features including Android Auto for seamless smartphone integration, Automatic Climate Control for consistent cabin comfort, Remote Start for convenience in any weather, and an Off-Road Package that enhances capability on rough terrain. This GMC Sierra is backed by a CARFAX 1-Owner history, giving extra peace of mind about its maintenance and care. Feel the confidence of diesel power partnered with 4WD traction to tow trailers, haul equipment, and navigate Idaho backroads with ease. The SLE trim balances functionality and comfort with durable materials, supportive seating, and smart storage solutions for daily use or extended trips. Priced to move this GMC Sierra 2500 offers the best price in the area for comparable diesel heavy-duty trucks, delivering exceptional value without compromising performance. Located in Mountain Home ID, itâs ready for immediate test drives and local pickup. Reach out to schedule a viewing and experience the torque, durability, and features that set this 2021 GMC Sierra 2500 SLE apart.
Equipment
The vehicle features a hands-free Bluetooth phone system. Keep your hands warm all winter with a heated steering wheel in the GMC Sierra . An off-road package is installed on this unit so you are ready for your four-wheeling best. Protect the vehicle from unwanted accidents with a cutting edge backup camera system. with XM/Sirus Satellite Radio you are no longer restricted by poor quality local radio stations while driving this GMC Sierra. Anywhere on the planet, you will have hundreds of digital stations to choose from. This model offers Automatic Climate Control for personalized comfort. Start this unit from inside with remote start. This GMC Sierra offers Apple CarPlay for seamless connectivity. This vehicle comes equipped with Android Auto for seamless smartphone integration on the road. This GMC Sierra features steering wheel audio controls. Good News! This certified CARFAX 1-owner vehicle has only had one owner before you. Maintaining a stable interior temperature in the vehicle is easy with the climate control system.
Packages
SLE Convenience Package. X31 Off-Road and Protection Package: LT275/70R18E AT BW Tires; Spray-On Pickup Box Bed Liner with GMC Logo; 1st and 2nd Row All-Weather Floor Liner; 18" Machined Aluminum Wheels. X31 Off-Road Package: Off-Road Suspension; Hill Descent Control; Skid Plates. SLE Value Package: Spray-On Pickup Box Bed Liner with GMC Logo. Preferred Equipment Group 3SA: OnStar and GMC Connected Services Capable; Power Front Windows with Passenger Express Down; Remote Keyless Entry; 2-Speed Electronic Shift Transfer Case; Deep-Tinted Glass; Chrome Surround Grille with High Gloss Black Mesh; AM/FM Radio with GMC Infotainment System; Power Rear Windows with Express Down; Integrated Trailer Brake Controller; SiriusXM Radio; Manual Tilt Wheel Steering Column; Power Windows with Driver Express Up/down; Compass Located in Instrument Cluster; Steering Wheel Audio Controls; Power Door Locks. 18" M
Used 2021 GMCSierra 2500 HD SLE
- Exterior Color
- Quicksilver Metallic
- Interior Color
- Jet Black, Cloth seat trim
- Odometer
- 110,603 miles
- Transmission
- Automatic
- Drivetrain
- 4WD
- Engine
- 6.6L Duramax Turbo-Diesel V8 engine
- VIN
- 1GT49MEY8MF271453
- Stock Number
- HG06006A
GMC
Sierra 2500 HD
Included Packages & Accessories
DETAILED_SPECIFICATIONS hidden
- Max seating capacity: 6
- Fuel System: Direct Injection
- Fuel tank capacity: 36 gal
- Horsepower: 401
- Towing capacity: 14500 lbs
- 4G LTE Wi-Fi® hotspot capable:
- Terms and limitations apply. See onstar.com or dealer for details.
- Terms and limitations apply. See onstar.com or dealer for details.
- May require additional optional equipment
- 6-speaker audio system:
- Speakers are positioned throughout the cabin for outstanding sound quality and an enjoyable listening experience
- Bluetooth®:
- Pair your compatible mobile phone to your vehicle's infotainment system1
- Place and receive hands-free phone calls
- Store your phone's contact list in the system to place an outgoing call quickly using the touch-screen display or voice command system
- With streaming audio capability, you can listen to files stored on your phone or Bluetooth digital media device
- GMC Infotainment System with color touchscreen:
- Multi-touch display and AM/FM stereo
- 7" diagonal color touchscreen for customizing and managing entertainment and vehicle feature settings1 on Sierra 1SA
- 8" diagonal color touchscreen for customizing and managing entertainment and vehicle feature settings1 on SLE and Elevation
- Bluetooth®2 audio streaming for 2 active devices
- Apple CarPlay™ capability for compatible phones3
- Android Auto™ capability for compatible phones4
- SiriusXM® 3-month All Access Trial Subscription:
- Welcome to the world of SiriusXM1
- Enjoy the widest variety of entertainment anywhere, including the deepest collection of ad-free music, more sports coverage than anywhere, exclusive talk channels, every kind of comedy and the most complete news coverage
- Plus, listen on the SiriusXM app, online and at home on compatible connected devices — it's included with All Access, so you'll hear the best SiriusXM has to offer, anywhere life takes you
- 17" LT245/75R17E all-season, blackwall spare tire:
- May require additional optional equipment
- 18" LT275/70R18 all-terrain, blackwall spare tire:
- May require additional optional equipment
- 18" LT275/70R18E all-terrain, blackwall tires
- 18" machined aluminum wheels with Dark Grey metallic accents
- Black outside power-adjustable vertical trailering mirrors with power folding/manual extending auto-dimming driver upper glass:
- Lower convex mirrors
- Heated upper glass
- Integrated turn signal indicators
- Puddle lamps
- Perimeter lighting
- Auxiliary lighting
- Extends 3.31-inches
- May require additional optional equipment
- Body-color door handles
- Cab-mounted cargo area lamps:
- Activated by switch located on center switch bank
- Illuminates the cargo bed area
- Cargo bed LED lighting:
- Provides light to find cargo in the bed
- Rear pillar lamps
- May require additional optional equipment
- Cargo tie-downs:
- 12-fixed rated at 500 lbs. per corner
- Chrome front bumper:
- May require additional optional equipment
- Chrome rear bumper:
- With integrated CornerSteps
- May require additional optional equipment
- CornerStep rear bumper:
- Helps make it easier to get into and out of the pickup bed
- Located at each end of the rear bumper
- Textured step pads to help provide secure footing
- Deep-tinted glass:
- Provides added protection from sun and glare
- Front license plate bracket:
- Front bracket is included if displaying a front license plate is required in your state
- GMC MultiPro Tailgate:
- Six function tailgate designed to help improve loading, unloading and accessing the cargo box
- Hitch area lighting
- Power lock and release
- May require additional optional equipment
- LED fog lamps:
- Help minimize glare in adverse driving conditions
- LED tail lamps:
- C-shaped LED taillamps with incandescent stop, turn and reverse light
- Rear wheelhouse liners:
- Help protect your truck's rear wheelhouse area from damage caused by dirt, rocks, mud, road salt and the weather
- May require additional optional equipment
- Side Bed Step:
- Black textured step pads help provide secure footing
- Integrated on forward portion of outer bed on driver and passenger side to provide ease of access to forward portion of the bed
- Smoked Amber LED roof marker lamps:
- Roof-mounted lamps near the front of the cab
- Spare tire carrier lock:
- Helps keep spare tire secure
- Utilizes the same key as the door and ignition
- Spray-on bedliner:
- Provides a Black, textured, non-skid surface that helps protect the bed and minimizes cargo shifting
- Covers the entire bed surface below side rails, front box top rail, gauge hole plugs and tie-downs
- Chemically bonded, the sprayed-on liner permanently bonds to the truck bed, providing a watertight seal
- Includes logo
- Does not include spray-on liner on tailgate due to Black composite inner panel
- Stainless-steel beltline moldings:
- May require additional optional equipment
- Tailgate and bed rail protection caps
- Tailgate with EZ Lift assist, power lock & release:
- Hitch area lighting
- May require additional optional equipment
- Winter Grille Cover:
- May require additional optional equipment
- 10-way power driver seat with power lumbar:
- Moves the seat forward and back, and up and down
- Tilt the seat cushion and seatbacks
- 12-volt auxiliary front power outlet:
- May require additional optional equipment
- 12-volt auxiliary rear power outlet:
- May require additional optional equipment
- 4-way manual front passenger seat:
- Can be positioned forward or back and up or down
- 4.2" diagonal color Driver Information Center:
- Includes driver personalization, warning messages and vehicle information
- 40/20/40 split-bench front seat with under-seat storage:
- Seating for up to 3
- Driver and front passenger seatbacks recline
- Head restraints at the outboard seating positions
- Center seatback that doubles as a fold-down armrest with storage
- 60/40 split-folding rear bench seat:
- Includes child seat top tether anchor
- Can fold one or both sides up
- All-weather floor liners:
- Feature a textured, anti-slip pattern that helps trap debris and water while providing carpet coverage
- Include Brand logo
- Provides coverage for first and second-row seating
- Replaces factory floor mats
- Assist handles:
- Front A-pillar mounted for Driver and Passenger
- Rear B-pillar mounted
- Carpeted floor covering:
- Color-keyed to match the interior
- Compass:
- Located in instrument cluster
- Cruise control:
- Maintains a selected speed while driving
- Automatically disengages when the vehicle's traction control system needs to limit wheelspin on slippery surfaces or when the StabiliTrak® stability control system detects an oncoming skid
- Set and resume speed functions
- Steering-wheel mounted controls to easily maintain and manage cruising speed
- Dual-zone automatic climate control:
- Automatically maintains the selected temperatures for both the driver and front passenger
- Allows individual climate settings for both driver and front passenger
- Driver and front passenger can choose a temperature up to 30 degrees difference
- May require additional optional equipment
- GMC Connected Access capable:
- Subject to terms. See onstar.com or dealer for details.
- May require additional optional equipment
- Heated driver and front outboard passenger seats:
- Separate buttons on the climate control panel allow you to choose from 3 levels of warmth
- At the touch of a button you can warm the cushions and seatbacks with multilevel temperature control
- Individually controlled
- Seats can be programmed to automatically warm up when it's cold out
- May require additional optional equipment
- Heated steering wheel:
- With the press of a button the steering wheel quickly heats up to provide additional comfort on a cold day
- May require additional optional equipment
- Inside rearview auto-dimming mirror:
- Automatically dims the inside rearview mirror when it senses bright light from behind
- When headlamp glare is no longer detected, the mirror returns to its normal state
- Instrumentation:
- 6-gauge cluster
- Speedometer, fuel level, engine temperature, tachometer, voltage and oil pressure
- Keyless Open and Start:
- With the Keyless Entry fob in your possession, conveniently locks and unlocks your car's doors without having to use the key fob
- With the vehicle in Park or Neutral, press the brake pedal and then press the engine start/stop button to start the engine; the green indicator on the button will illuminate
- Shift to Park and press the engine start/stop button to turn off the engine
- May require additional optional equipment
- Leather-wrapped steering wheel:
- May require additional optional equipment
- Manual tilt and telescoping steering column:
- Allows the driver to adjust the steering wheel up or down, and the steering column forward or back
- May require additional optional equipment
- Outside temperature display:
- Located in infotainment display
- Power door locks:
- Programmable
- Allows you to lock and unlock doors easily whether it's from the driver or front passenger seat or from outside using the key fob (when equipped)
- Power windows with driver express-up/down:
- Quickly raises the window or lowers it with the touch of a button
- If an obstruction is detected, the anti-pinch feature will auto-reverse
- Power windows with front passenger express-down:
- Quickly lowers the window with the touch of a button
- If an obstruction is detected, the anti-pinch feature will auto-reverse
- Power windows with rear express-down:
- May require additional optional equipment
- Rear Seat Reminder:
- Helps to remind the driver to check the back seat(s) before leaving the vehicle1
- Activates when rear doors are opened and closed up to 10 minutes before or anytime while your vehicle is on
- Under certain conditions, once the vehicle is switched off, designed to sound 5 audible chimes and display a visual message within the Driver Information Center
- Activates only once each time the vehicle is turned on and off, and would require re-activation on a second trip
- Rear air vents:
- Provides cabin comfort for rear occupants
- Rear window defogger:
- Helps to keep your rear view clear of fog or frost
- Utilizes a warming grid to help remove fog or frost from the rear window
- Remote Start:
- Start your vehicle remotely and step into a comfortably warmed or cooled vehicle, depending on the weather and your preset preferences
- Locks doors and turns on parking lamps while the engine is running
- Activates the climate control system
- Steering column lock control:
- Helps prevent theft by allowing the steering wheel to operate only with the proper key fob
- May require additional optional equipment
- Steering-wheel mounted controls:
- Allow the driver to easily operate the audio system and phone interface controls
- May require additional optional equipment
- Theft-deterrent unauthorized entry system:
- Sounds the horn and flashes the turn signals when someone attempts to open the vehicle without the proper key or remote transmitter
- Helps deter unauthorized entry, helping to protect your vehicle
- May require additional optional equipment
- USB ports:
- 2 located on instrument panel1
- USB ports:
- Second row includes 2 USB charging-only ports1
- 11,350 lbs. GVWR:
- When properly equipped; includes weight of vehicle, passengers, cargo and equipment
- 3.42 rear axle ratio:
- Requires a diesel engine
- 4-wheel antilock disc brakes:
- Help reduce wheel lockup and maintain steering control during hard braking on most slippery surfaces
- DuraLife™ brake rotors feature a hardened surface to reduce corrosion and provide quieter braking with less vibration. DuraLife™ rotors are hardened and strengthened during the manufacturing process
- Brake system features a corrosion-fighting process called Ferritic Nitro-Carburizing (FNC) which can double rotor life expectancy and reduce or minimize rust over non-FNC coated rotors
- 6.6L Duramax Turbo-Diesel V8 engine:
- 445 hp [332 kW] @ 2800 rpm
- 910 b-ft. of torque [1220 Nm] @ 1600 rpm
- 3.42 rear axle ratio
- Exhaust brake
- Engine block heater
- Capped fuel fill
- Paired with an Allison® 10-speed automatic transmission
- Diesel Exhaust Fluid (DEF) fill located in fuel door
- Engine after run feature for cooling performance
- May require additional optional equipment
- Air filtration monitoring:
- Alerts the driver when the engine air filter needs replacement
- Allison® 10-speed automatic transmission:
- Electronically controlled with overdrive for smooth-shifting performance
- Tow/Haul mode that reduces shift cycling for better control and improved cooling when towing or hauling heavy loads
- Auto Grade Braking that automatically downshifts when needed to enable engine braking, helping to slow the vehicle on downhill grades and reduce brake wear (operates in Tow/Haul mode)
- May require additional optional equipment
- Automatic locking rear differential:
- When the differential senses a significant difference in wheel speed, it locks to turn both rear wheels in unison for added traction
- The Eaton® Locker senses a difference in wheel speed of approximately 100 rpm
- Black vertical recovery hooks:
- Two front frame-mounted1
- Brake pad wear indicator
- Capless fuel fill:
- Prevents paint scratches that can result from a tethered fuel cap
- Creates a tight seal around the fuel-pump nozzle when the nozzle is fully inserted
- Requires gasoline engine
- Diesel exhaust brake:
- Reduces the amount of conventional braking needed while towing a heavy trailer or driving downhill
- Uses the variable vanes in the turbocharger to smoothly and quietly create additional back pressure in the engine to help slow the vehicle
- Works with the transmission's Tow/Haul mode and Auto Grade Braking to help the driver maintain the desired speed even on long, steep downgrades
- Switch activated
- May require additional optional equipment
- Electronic shift 2-speed transfer case with push button controls:
- System shift smoothly between drive settings to handle a variety of road conditions
- 2WD High for most on-road and highway situations
- 4WD High for snowy or wet roads when added traction is needed
- 4WD Low for deep sand, mud or snow to provide maximum torque to all 4 wheels
- Neutral
- ONLY used for towing vehicle (Dinghy tow capability)- allows vehicle to roll freely
- May require additional optional equipment
- Engine block heater:
- Helps ease cold weather starts
- Heats the engine and engine block fluids
- External auxiliary transmission oil cooler:
- Heavy-duty air-to-oil cooler
- Helps provides optimal transmission performance even when operating under a heavy load or towing a trailer
- May require additional optional equipment
- External engine oil cooler:
- Heavy-duty air-to-oil cooler
- Helps extend engine oil life under heavy loads
- Fully boxed frame:
- Hydroformed front section
- High-strength steel
- Heavy-Duty Air Filter:
- Thick construction helps to trap more dirt before it can enter the air intake
- Heavy-duty 720 cold-cranking amps battery:
- 80 Amp-hr
- Maintenance-free with rundown protection and retained accessory power
- May require additional optional equipment
- Hill Descent Control:
- Uses antilock braking to help provide a smooth, controlled descent
- Helps driver maintain control of the vehicle without depressing the brake pedal
- Activates by pushing a button below the instrument panel
- May require additional optional equipment
- Integrated trailer brake controller:
- Integrated with the antilock brake system (ABS)
- Helps provide measured brake force signaling to electric-controlled trailer brake systems
- Trailer gain and output are displayed in the Driver Information Center
- Pickup bed:
- Roll-formed high-strength steel
- Skid plates:
- Help protect the front underbody, oil pan, differential case and transfer case
- May require additional optional equipment
- Steering:
- Recirculating Ball with smart flow power steering system
- Trailering wiring provisions for camper, 5th wheel and gooseneck trailer:
- For trailering fifth-wheel and gooseneck trailers
- Includes additional 7-way wiring harness located at the rear of the pickup bed, attached to the rear frame cross member
- SLE Convenience package:
- Remote Start
- Heated steering wheel
- Rear-window defogger
- Keyless Open and Start
- Dual climate control
- 10-way power driver seat including power lumbar
- Heated driver and front passenger seats
- Manual tilt/telescoping steering column
- Content theft alarm
- Steering column lock
- Front 40/20/40 split-bench seat with underseat storage
- Crew Cab and Double Cab models also include:
- 2-charge-only USB ports for second row
- Cargo bed LED lighting
- Rear auxiliary 12-volt power outlet
- LED fog lights
- Rear wheelhouse liners
- LED roof marker lamps
- SLE Value Package:
- SLE Convenience package
- Remote Start
- Heated steering wheel
- Rear-window defogger
- Keyless Open and Start
- Dual climate control
- 10-way power driver seat including power lumbar
- Heated driver and passenger seats
- Manual tilt/telescoping steering column
- Content theft alarm
- Steering column lock
- Front 40/20/40 split-bench seat with underseat storage
- 2-charge-only USB ports for second row
- Cargo bed LED lighting
- Rear auxiliary 12-volt power outlet
- LED fog lights
- Rear wheelhouse liners
- Spray-on bedliner with GMC logo
- Trailering Package:
- Trailer Hitch1
- Trailering hitch platform
- Includes a 2.5" receiver hitch (with 2" insert), 4-pin and 7-pin connectors
- 7-wire electrical harness and 7-pin sealed connector for connecting your trailer's lights and brakes to your vehicle
- May require additional optional equipment
- X31 Off-Road Package:
- Off-Road suspension
- Hill Descent Control
- Skid plates
- Twin-tube Rancho shocks
- X31 hard badge
- May require additional optional equipment
- X31 Off-Road and Protection Package:
- Off-Road suspension with Twin-tube Rancho® shocks
- Hill Descent Control
- Skid plates (transfer case and oil pan)
- Spray-on bedliner
- All-weather floor liners
- X31 badge (replaces "4X4" badge on bed)
- SLE includes 18" machined aluminum wheel with Dark Grey metallic accents and 18" LT275/70R18E all-terrain, blackwall tires
- SLT includes 20" machined aluminum wheel with bright Silver accents and 20" LT275/65R20 all-terrain, blackwall tires
- May require additional optional equipment
- Trailering Information Label:
- Provides max trailer ratings for tongue weight, conventional, gooseneck hitch and 5th wheel hitch
- LED Daytime Running Lamps:
- Daytime Running Lamps automatically illuminate signature lighting
- 6 airbags:
- Dual-stage frontal airbags for driver and front outboard passenger1
- Seat-mounted side-impact airbags for driver and front outboard passenger1
- Head-curtain airbags for outboard seating positions1
- Includes front outboard Passenger Sensing System for frontal outboard passenger airbag and illuminates a status light that indicates whether the airbag is on or off1
- Hitch Guidance:
- Displays a guideline on the Rear Vision Camera view when you're in Reverse to help line up your hitch to your trailer1
- When driving, Hitch Guidance allows you to briefly check your trailer using the Rear Vision Camera view
- OnStar® & GMC Connected Services capable:
- Terms and limitations apply. See onstar.com or dealer for details.
- Rear Vision Camera:
- Shows you an image of the area directly behind your vehicle when you're in Reverse at low speeds1
- Selectable dynamic guidelines laid over the display image assist in parking maneuvers by showing the vehicle's path
- This may help you park and avoid nearby objects
- Tailgate must be in the raised position for the Rear Vision Camera to operate properly
- May require additional optional equipment
- Teen Driver:
- This configurable feature lets you activate customizable vehicle settings associated with a key fob to help encourage better driving behavior
- It can limit certain vehicle features, and automatically turns on certain safety systems if vehicle is equipped
- An in-vehicle report card gives you information on driving habits and helps you to continue to coach your new driver
- Tire Pressure Monitoring System:
- Monitors the pressure in each tire and alerts you if there is a low-pressure condition in one or more of the tires1
- Includes Tire Fill Alert1
- StabiliTrak, electronic stability control system with traction control:
- Automatically helps enhance control, particularly during emergency maneuvers, by adjusting the brakes and engine torque to help you stay on your intended path
- Activates when vehicle sensors detect a difference between the driver's intended path and the direction the vehicle is actually travelling
- Includes Traction Control that detects wheel slippage and applies brake pressure and/or reduces engine power to help the driver maintain control when accelerating on wet or snow-covered roads
- Includes Brake Assist which detects rapid brake pedal applications due to emergency braking situations and provides additional braking via the Antilock Brake System (ABS) module
- Includes Trailer Sway Control
- Hill Start Assist
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… - 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!… - 3.0
Don't judge a truck by the appearance
By jmil | on Wednesday, May 11, 2022
Great truck, loved it until the DEF tank heater malfunctioned and shut down the truck. Now sitting waiting for the replacement tank for over 10 weeks. Turns out every HD truck 2020 and 2021 has the same problem and all will need this replacement that is being produced at a snail's pace by GM. Per the dealership, last count, over 9000 trucks like mine are idle waiting for this part. $65000 waste of money and terrible service by GMC (not the local dealership).…
Based on 13 consumer ratings for 2020–2025 models. | Privacy
* MSRP is the Manufacturer's Suggested Retail Price (MSRP) of the vehicle. It does not include any taxes, fees or other charges. Pricing and availability may vary based on a variety of factors, including options, dealer, specials, fees, and financing qualifications. Consult your dealer for actual price and complete details. Vehicles shown may have optional equipment at additional cost.
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