2021 GMC Sierra 3500 AT4
VIN: 1GT49VEYXMF134424 STOCK: 26481
Thanks for checking out McCoy Auto Sales of Chambersburg, Pa. This Summit White 2021 GMC Sierra 3500HD AT4 equipped with a 6.6L Duramax is ready for anything! It has a 10 speed Allison transmission, 20" KG1 Forged alloy wheels, tonneau cover, leather seating, power, heated / cooled front seats, AT4 PREMIUM PLUS PACKAGE, AT4 PREFERRED PACKAGE, TECHNOLOGY PACKAGE, GOOSENECK / 5TH WHEEL PACKAGE, DRIVER ALERT PACKAGE I & II, ENGINE BLOCK HEATER, GOOSENECK / 5TH WHEEL PREP PACKAGE, HEAVY DUTY FRONT SPRING/CAMPER PACKAGE, EXHAUST BRAKE, sunroof, 8" display, head up display, wireless charging, lane departure alert, and more! This extremely well equipped truck has No Accidents and would be a great addition to your garage!!
WHY BUY THIS VEHICLE?
McCoy Auto Sales provides at no cost a 6 month or 6,000 mile powertrain warranty for peace of mind after this major purchase.
At McCoy Auto Sales you'll find a great selection of quality hand-picked vehicles to choose from at affordable prices! We price our cars based on the market and sell them quickly. We are a NO HASSLE, NO GAMES dealership and even though we feel our prices are competitive, we are here to SELL them so if we're close don't hesitate to make a REASONABLE OFFER. We offer multiple financing options, take trades and will do our best to make sure buying a vehicle is as simple as it should be!
Important Package Information!
Driver Alert Package I
- Perimeter Lighting
- Ultrasonic Front and Rear Park Assist
- Rear Cross Traffic Alert
- Lane Change Alert with Side Blind Zone Alert
Driver Alert Package II
- Safety Alert Seat
- IntelliBeam Automatic High Beam On/off
- Following Distance Indicator
- Forward Collision Alert
- Lane Departure Warning
- Automatic Emergency Braking
AT4 Premium Plus Package
- Power Sunroof
- 20" Machined Aluminum Wheels
- AT4 High Clearance Step
Technology Package
- Auto-Dimming Inside Rearview Mirror with Camera
- 8" Driver Information Center
- Multicolor 15" Diagonal Head-Up Display
Preferred Equipment Group 4SB
- GMC Connected Access Capable
- Power Front Passenger Windows with Express Up/down
- Power Rear Windows with Express Down
- Deep-Tinted Glass
- Keyless Open and Start
- Power Door Locks
- Power Front Windows with Driver Express Up/down
- Rear Wheelhouse Liners
- Premium Rear Floor Liners with Removable Carpet Insert
- Premium Front Floor Liners with Removable Carpet Insert
- Remote Vehicle Starter System
- Electric Rear-Window Defogger
- Spray-On Pickup Bed Liner with AT4 Logo
- Compass Located in Instrument Cluster
- Floor-Mounted Center Console
- Painted Black Surround Grille with High Gloss Black Mesh
- Integrated Trailer Brake Controller
- Heated Driver and Front Outboard Passenger Seats
- 2nd Row Heated Outboard Seats
- 120-Volt Bed Mounted Power Outlet
- 120-Volt Instrument Panel Power Outlet
- 12-Volt Rear Auxiliary Power Outlet
- Ventilated Driver and Front Passenger Seats
- 2 USB Ports Inside Console
- 2 USB Ports (first Row)
- Electrical Lock Control Steering Column
- Manual Tilt-Wheel/telescoping Steering Column
- 2-Speed Active Transfer Case
- ProGrade Trailering System
- 4.2" Diagonal Color Display Driver Info Center
- OnStar and GMC Connected Services Capable
- LED Cargo Area Lighting
- Red Recovery Hooks
- Steering Wheel Audio Controls
- 2nd Row Dual USB Charge-Only Ports
- Unauthorized Entry Theft-Deterrent System
- HD Rear Vision Camera
- 4G LTE Wi-Fi Hotspot Capable
- Wireless Phone Projection
- X31 Off-Road Package
Gooseneck/5th Wheel Package
- Gooseneck/5th Wheel Prep Package
AT4 Preferred Package
Safety and Security
- The vehicle is equipped with a system that senses, and then prepares, the vehicle and/or occupants, for an impending forward collision.
Technology and Telematics
- Without the need for a manufacturer specific app to be installed on the smart device, the vehicle infotainment system can access and control functions of a smart device physically plugged-into the vehicle.
- Apple CarPlay/Android Auto smart device wireless mirroring
- 4G LTE Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.com or dealer for details.)
- Tire, spare LT275/70R18 all-terrain, blackwall
- Bed Liner, Spray-on Pickup bedliner with GMC logo (does not include spray-on liner on tailgate due to Black composite inner panel) (AT4 logo replaces GMC logo. Not available with any Ship Thrus EXCEPT (VSH), (VTV), (TCH) or (TCE).)
- Grille, Painted Black surround with high gloss Black mesh and Black chrome inserts
- Mirrors, outside power-adjustable vertical trailering with heated and auto-dimming upper glass, (driver and passenger) lower convex mirrors, turn signal indicators, puddle lamps, perimeter lighting, auxiliary lighting, power folding/extending (extends 3.31" [84.25mm])
- LED Cargo Area Lighting located in cargo bed activated with switch on center switch bank or key fob
- Moldings, beltline, Black
- Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
- Fog lamps, LED
- Taillamps, LED signature taillight with LED stop and reverse light
- Tailgate, GMC MultiPro Tailgate with six functional load/access features
- Mirror caps, high gloss Black
- Lamps, cargo area, cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel
- Bumper, front, body-color lower
- Bumper, rear body-color with bumper CornerSteps
- Glass, deep-tinted
- Tailgate and bed rail protection caps, top
- Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
- Wheelhouse liners, rear
- CornerStep, rear bumper
- Door handles, body-color
- Bed Step, Black integrated on forward portion of bed on driver and passenger side
- Theft-deterrent system, unauthorized entry
- Remote vehicle starter system
- Cruise control, steering wheel-mounted
- Air conditioning, dual-zone automatic climate control
- Steering column, manual Tilt-Wheel and telescoping
- Steering wheel, heated
- Air vents, rear
- Seats, heated second row outboard seats
- Compass, located in instrument cluster
- Seat adjuster, driver 10-way power including lumbar
- Seat adjuster, passenger 10-way power including lumbar
- Power outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)
- Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)
- Steering column, lock control, electrical
- Instrument cluster, 6-gauge cluster featuring speedometer, fuel level, engine temperature, tachometer, voltage and oil pressure
- USB ports, dual, charge-only (2nd row)
- Driver Information Center, 4.2" diagonal color display includes driver personalization
- Exterior Temperature Display located in radio display
- Window, power front, drivers express up/down
- Center Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
- Seat, Up-level Rear with Storage Package, 60/40 folding bench for Crew Cab models includes full-length bench seat, seatback storage on left and right side, center fold out armrest with 2 cupholders, full cab width underseat storage, (includes child seat top tether anchor)
- Driver memory, recalls driver "presets" for power driver seat and outside mirrors
- Assist handles, front A-pillar mounted for driver and passenger, rear B-pillar mounted
- Steering wheel audio controls
- Steering wheel, leather-wrapped
- Audio system feature, 6-speaker system
- Floor covering, color-keyed carpeting
- Four wheel drive
- Air filtration monitoring
- Transfer case, two-speed active electronic Autotrac with push button control
- Battery, heavy-duty 720 cold-cranking amps/80 Amp-hr maintenance-free with rundown protection and retained accessory power (Included and only available with (L8T) 6.6L V8 gas engine.)
- Alternator, 170 amps (Requires (L8T) 6.6L V8 gas engine.)
- Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section
- Steering, Digital Variable Steering Assist this system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigue
- Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
- In-vehicle Trailering App, System includes checklist, trailer maintenance reminders, trailer security alerts, trailer mileage, tow/haul reminder, trailer electrical diagnostics and Trailer Tire Pressure Monitor System module (Includes trailer tire pressure monitoring alert ONLY when (PTT) trailer tire pressure monitor system is factory ordered and sensors are installed.)
- Skid Plates protect the oil pan, front axle and transfer case
- Suspension, Off-Road includes twin-tube shocks
- Capless Fuel Fill (Requires (L8T) 6.6L gas V8 engine.)
- GVWR, 11,350 lbs. (5148 kg) with single rear wheels (Included and only available with TK30743 model and (L8T) 6.6L V8 gas engine. Requires single rear wheels.)
- Air filter, heavy-duty
- Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
- Cargo tie downs (12), fixed, rated at 500 lbs per corner
- Recovery hooks, Red
- Brake lining wear indicator
- Single rear wheels
- Trailer brake controller, integrated
- Cooling, auxiliary external transmission oil cooler
- Cooling, external engine oil cooler
- Auto-locking rear differential
- Rear seat reminder
- Airbags, dual-stage frontal airbags for driver and front outboard passenger; Seat-mounted side-impact airbags for driver and front outboard passenger; Head-curtain airbags for front and rear outboard seating positions; Includes front outboard Passenger Sensing System for frontal outboard passenger airbag (Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)
- Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching
- GMC Connected Access capable (Subject to terms. See onstar.com or dealer for details.)
- Teen Driver a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to help encourage safe driving behavior. It can limit certain available vehicle features, and it prevents certain safety systems from being turned off. An in-vehicle report card gives you information on driving habits and helps you to continue to coach your new driver
- StabiliTrak, stability control system with Proactive Roll Avoidance and traction control includes electronic trailer sway control and hill start assist
* Pricing does not include sales tax, dealer documentation fee, title fee, license fees, service contracts, ancillary products, or any finance charges unless otherwise stated. Easy Credit Approvals based on finance source criteria. Not all applicants will qualify the same. Terms, rates, and down payments will vary greatly depending on credit worthiness, ability to make payments, job time, etc. Proof of income, residency and other documentation may be required for final approval in some cases. McCoy Auto Sales is not responsible for misprints on equipment.
Customers Reviews
Cheri Easterday
2026-02-02
Excellent treatment, quick and knowledgeable
Frank Graham
2026-02-02
Great people , they had me in and out in no time, with the vehicle I wanted
Kristen McCauley
2026-01-23
Great service, they help me with everything, was very kind and energetic. Love this place
a-z motors
2026-01-21
Found a 2020 ford f450 they had online got in touch with them and they took care of everything. I drove two hours there and two hours home the truck is perfect. Will definitely do business with again. I highly recommend this dealership.
John Detwiler
2026-01-10
Nice place. They are easy to work with and talk you through each step in the buying process. Mike, who helped me, was great. Good attitude and friendly. When the time comes for another vehicle, I will return to mccoy.
DR
2026-01-09
Such a streamlined experience. I never knew buying a car would be so easy. Thank you Corey for all your help. Very friendly staff as well.
Mother Duck
2026-01-09
Bought a truck from Mike last night. Great experience and he was awesome to deal with!
Adam Johnson
2026-01-08
Mike and Corey are great to deal with and couldn’t ask for better people to deal with
Ashley Atherton
2025-12-29
Corey was GREAT to deal with!!! Very laid-back environment where everyone is friendly and professional. The entire process was smooth, stress-free, and never felt pushy. Highly recommend!
