If you want heavy-duty capability with serious off-road presence, this truck delivers in every way.
New Arrival — Locally owned, one owner 2026 GMC Sierra 3500HD AT4 with under 1k miles. Practically brand new and equipped for both work and adventure, this Sierra includes Warranty Protection for Life and Oil Changes for Life, providing long-term confidence and peace of mind from day one.
Powered by the legendary Duramax 6.6L V8 Turbo Diesel and paired with a 2-speed active electronic Autotrac transfer case, this AT4 is built for towing, hauling, and tackling tough terrain without hesitation. The AT4 Premium Plus Package adds luxury, technology, and off-road-ready enhancements to match its capability.
Performance & Capability: • Duramax 6.6L V8 Turbo Diesel • 2-Speed Active Electronic Autotrac Transfer Case • Auto-Locking Rear Differential • Trailer Brake Controller • Trailering Package w/ Hitch Guidance & Hitch View • Gooseneck / 5th Wheel Prep Package • In-Vehicle Trailering App • Digital Variable Steering • Stabilitrak w/ Trailer Sway Control & Hill Start Assist • 3.42 Rear Axle Ratio
AT4 Premium Plus Package: • Power Sunroof • Rear Camera Mirror • 15'' Multi-Color Head-Up Display • Power Sliding Rear Window • Universal Home Remote • LED Roof Marker Lamps • Off-Road High Clearance Steps
Technology & Connectivity: • 13.4'' GMC Premium Infotainment System • Google Built-In Compatibility w/ Navigation • Wireless Apple CarPlay & Wireless Android Auto • 12.3'' Reconfigurable Driver Information Center • OnStar Basics (Up to 8 Years) • SiriusXM Audio w/ Trial Subscription • Wireless Charging • Remote Vehicle Start • 120V AC Power Outlets (Cab & Bed)
Interior Comfort & Convenience: • Heated & Ventilated Front Seats • Heated Second Row Outboard Seats • Heated Wrapped Steering Wheel • 10-Way Power Driver Seat • Driver Seat & Mirror Memory • Dual-Zone Automatic Climate Control • Premium Floor Liners • Rear Window Defogger • Bose Premium Sound System • Bed View Camera
Exterior Highlights: • 20'' High Gloss Black Aluminum Wheels • Spray-On Bed Liner • GMC MultiPro Tailgate w/ EZ-Lift Power Lock & Release • Animated LED Projector Headlamps • LED Fog Lamps • LED Cargo Bed Lighting • Power Folding / Extending Heated Mirrors w/ Perimeter Lighting • Rain-Sensing Wipers • Rear Wheelhouse Liners
Sierra HD Pro Safety: • Trailer Side Blind Zone Alert • Rear Cross Traffic Alert • Driver Safety Alert Seat • HD Surround Vision • Front & Rear Park Assist • Automatic Emergency Braking • Forward Collision Alert • Front Pedestrian Braking • Lane Departure Warning • Following Distance Indicator • IntelliBeam Auto High Beams
This Sierra 3500HD AT4 combines serious heavy-duty performance with off-road attitude and premium comfort. Whether you’re towing a trailer, heading into the mountains, or simply enjoying the drive, it delivers strength, technology, and refinement in one impressive package.
With under 1,000 miles, one-owner history, Warranty Protection for Life, and Oil Changes for Life included, this is as close to buying new as you can get — without the wait.
Sunset Chevrolet, 603 Harrison St in Tiny Overhead Sumner, part of the Sunset Auto Family.
The exclusive home of Warranty Protection for Life — a limited Powertrain Warranty that’s honored at any ASE-certified repair facility in the U.S. and Canada. Available on all qualifying new and pre-owned vehicles for as long as you own it.
Equipment & Features
AT4 Preferred Package
AT4 Premium Plus Package
Gooseneck/5th Wheel Prep Package
Preferred Equipment Group 4SB
Technology Package
X31 Off-Road Package
7 Speakers
AM/FM radio: SiriusXM with 360L
Bose Premium 7-Speaker Sound System
Premium audio system: Premium GMC Infotainment System
Radio: AM/FM Stereo with Premium GMC Infotainment System
SiriusXM with 360L Trial Subscription
Steering Wheel Audio Controls
Air Conditioning
Automatic temperature control
Electric Rear-Window Defogger
Front dual zone A/C
Rear window defroster
120-Volt Bed Mounted Power Outlet
120-Volt Instrument Panel Power Outlet
Driver Memory
Memory seat
Power driver seat
Power Front Windows with Passenger Express Up/Down
Power steering
Power windows
Push Button Start
Remote keyless entry
Remote Vehicle Starter System
Steering wheel mounted audio controls
Universal Home Remote
Manual Tilt-Wheel/Telescoping Steering Column
Off-Road Suspension
Speed-sensing steering
Traction control
4-Wheel Disc Brakes
ABS brakes
Dual front impact airbags
Dual front side impact airbags
Emergency communication system: OnStar Services capable
Front anti-roll bar
Front wheel independent suspension
Keyless Open and Start
Low tire pressure warning
Occupant sensing airbag
Overhead airbag
Power Sunroof
Pickup Bed
Brake assist
Electronic Stability Control
Lane Departure Warning System
Exterior Parking Camera Rear
Hill Descent Control
Auto High-beam Headlights
Delay-off headlights
Front fog lights
Fully automatic headlights
Panic alarm
Security system
Unauthorized Entry Theft-Deterrent System
Speed control
2-Speed Active Transfer Case
220 Amp Alternator
Dual Heavy-Duty 70 Amp-Hour Battery
Engine Block Heater
Exhaust Brake
Heavy-Duty 80 Amp-Hour Battery
Auto-dimming door mirrors
Bumpers: body-color
Gloss Black Header and Grille Insert Bars
Heated door mirrors
IntelliBeam Automatic High Beam on/Off
LED Cargo Area Lighting
LED Smoked Amber Roof Marker Lamps
Off-Road High Clearance Step
Power door mirrors
Rear step bumper
Rear Wheelhouse Liners
Spray-on Pickup Bedliner with GMC Logo
Turn signal indicator mirrors
Winter Grille Cover
2 Charge-Only Rear USB Ports
2 Charge/Data USB Ports Inside Center Console
2 USB Ports
Auto-Dimming Inside Rearview Mirror with Camera
Auto-dimming Rear-View mirror
Automatic Emergency Braking
Bed View Camera with Two Trailer Camera Provisions
Buckle to Drive
Compass
Driver door bin
Driver vanity mirror
Floor-Mounted Center Console
Following Distance Indicator
Forward Collision Alert
Front Pedestrian Braking
Front reading lights
GMC Premium 13.4 Diagonal Information Display
HD Surround Vision
Heated steering wheel
Illuminated entry
Multicolor 15 Diagonal Head-Up Display
Outside temperature display
Overhead console
Passenger vanity mirror
Premium Front Floor Liners with Removable Carpet Insert
Premium Rear Floor Liners with Removable Carpet Insert
Sunset Mitsubishi / Kia makes no representations, expressed or implied, to any actual or prospective purchaser or owner of this vehicle as to the existence, ownership, accuracy, description or condition of the listed vehicle's equipment, accessories, price or any warranties. Any and all differences must be addressed prior to the sale of this vehicle. Vehicle pricing and availability subject to change without notice. All Pricing expires at midnight 05/07/2026. The price for listed vehicles as equipped does not include charges such as: Government fees and/or state or local taxes, license fee, registration fee, dealer documentary fee, finance charges, emissions testing fees, compliance fees, credit investigation, credit insurance, physical damage of liability insurance or delivery fees. WalkTheLot.com is not responsible for typographical or other possible errors. Please confirm all displayed data with the dealership.
LOCATION
Sunset Mitsubishi / Kia 910 Traffic Ave Sumner, WA. 98390 Google Map
