Ultimate Overland Vehicle Build
2025 GMC
Sierra 2500 AT4X HD
Each year the Overland Expo team selects a vehicle that embodies the overland lifestyle. Then the latest and greatest gear is assembled to make the build ready for any adventure. The build is donated to the Overland Expo Foundation and auctioned off on BringaTrailer.com. The Ultimate Overland Vehicle Build goes home with the highest bidder, and 100% of the proceeds go directly to the Overland Expo Foundation, a 501(c)(3) non-profit committed to advocating for responsible land use and restoration, promoting safety and preparedness, and fostering a diverse and inclusive community.
2025 Backcountry 6.85' (pop-up)
Overland Explorer Vehicles
Overland Explorer Vehicles pride themselves on using no wood in their construction to ensure a lifetime of abuse with little to no impact on the camper. In other words, your camper will look just as good in 10 years as it did the day you bought it! The Back Country comfortably sleeps up to four people, and with its four-season construction and three-season water system, you won’t be limited to the summer months. Built with powder-coated aluminum extrusions and OEV’s Gen 4 Advanced Fiberglass Composite System (AFCS) panels, the walls of Back Country 6.85’ have an R8 insulation value on the composite walls, and the fire-rated soft walls consist of four layers, providing an R4 insulation value.
Photo Gallery
Photos by: Andy at Peak Suspension
Read the Build Story
The GMC Sierra HD AT4X is a heavy-duty workhorse, featuring a fully-boxed high-strength steel frame designed to handle heavy payloads and demanding conditions. The AT4X trim elevates the Sierra HD lineup’s off-road performance, thanks to additional lift height and Multimatic DSSV (Dynamic Suspensions Spool Valve) dampers — race-proven shocks that offer precise damping across all terrain types.
The Sierra began the build process with American Expedition Vehicles adding their exclusive trail-ready components.
The truck then went to Tiny Rig Co. where the camper and additional gear were installed.
We are super excited to present, Your Home Away From Home!
build partner
American expedition vehicles edition package
Outfitted by American Expedition Vehicles (AEV), this edition comes equipped with AEV Front and Rear Bumper, AEV Fender Flares, (4) Stamped Steel Skid Plates: Radiator, IFS, Transfer Case and Transmission/Exhaust, AEV Floor Liners and AEV Badges & Embroidered Headrests. It pairs serious trail performance with premium comfort, making it equally at home crawling rocky passes or hauling gear across long, remote stretches. It’s built to go farther, carry more, and handle whatever the trail throws your way.
front bumper
Engineered for unparalleled protection in the most demanding environments by shielding the bottom of the radiator from damage.
rear bumper
Designed to look good, work hard and withstand all the rigors of off-road use. Meets all GM crash, safety, and airbag functionality standards.
skid plate
Heavy-duty stamped steel, designed to protect vital components like the engine, transmission, and transfer case from rocks, debris, and rough terrain—giving you confidence to tackle more aggressive off-road routes without hesitation.
fender flares
Designed to handle serious off-road abuse while adding a rugged, aggressive look. They provide extra tire coverage to protect the body from mud, rocks, and debris, and are made from durable, UV-resistant materials to stand up to the elements mile after mile.
floor liner
Designed to take a beating—made from durable, all-weather materials that trap mud, water, and debris to keep your interior clean no matter where the trail leads. Precision-fit for full coverage, they’re easy to clean and built to last through countless adventures.
American expedition vehicles Upfit package
snorkel kit
Helps prevent accidental water ingestion into the engine (the most common association with a snorkel), its primary function is to keep contaminants out of the intake system, extending the service life of your air filter and ensuring consistent engine performance, even in the most demanding off-road environments.
18" Salta XD Wheels
A perfect balance of strength, durability, and refined styling to Chevrolet Silverado HD and GMC Sierra HD trucks. AEV has long been known for designing wheels that can withstand extreme conditions, and the 18×9 Salta XD is no exception. With a staggering 4,100-lb load rating, it’s built to handle the demands of off-road expeditions and heavy-duty towing alike.
37” Tire Clearance Kit
Engineered to make room for larger tires without compromising ride quality or factory geometry. It includes high-clearance stamped steel components, precision-cut brackets, and all necessary hardware to ensure a clean, functional fit. Whether you're crawling rocks or cruising backroads, this kit gives your Sierra the clearance it needs to run 37s with confidence and style.
Rear Differential Cover
Built to withstand punishing impacts, this skid plate safeguards critical components, allowing you to tackle rugged off-road terrain and conquer obstacles with confidence.
Light Bar
Built for serious illumination and rugged durability. Designed to integrate seamlessly with the front bumper, it houses high-performance LED lighting that cuts through darkness, fog, and bad weather with ease.
Paint Appearance Package
The AEV Paint Appearance Package enhances the aggressive design of the body with custom design on the hood, roof, and tailgate.
37” BFGoodrich All-Terrain KO2 Tires
Offers aggressive traction, a severe snow rating and tougher sidewalls. The serrated shoulder design supports traction, especially in aired-down driving situations, and interlocking tread elements maximize traction and handling both on- and off-road by stabilizing the tread center and providing biting edges for better traction.
ComeUp SOLO 12.5 Winch
IP68 rated and will stand up to the harshest conditions even working when submerged under water. The newly redesigned wireless remote is more ergonomic and is powered by a standard watch battery which is easily replaced.
gear partners
Battleborn
GC3 LiFePO4 Deep Cycle Battery Kit
The Battle Born 270Ah 12V Heated GC3 LiFePO4 Deep Cycle Battery Kit is engineered for exceptional power and reliability in extreme conditions. Featuring Integrated Heating technology, it includes proprietary internal heating elements that ensure efficient charging and consistent performance, even in freezing temperatures.
Alu-Cab
Shower Cube
This compact and durable enclosure offers a comfortable space for showering, a quick wardrobe change, and a private outdoor restroom.
Alu-Cab
270° Shadow Awning
Designed to open, and setup, all in one. There are no additional steps or poles to pitch; you just unzip the bag and swing the awning through a full 270º. It’s so easy, one person can manage it.
Magnaflow
Black Series Filter-Back Performance System
The Black Series is the premiere exhaust system from Magnaflow featuring stainless steel construction, high temp black finish, and Magnaflow’s signature souind.
Air Lift
LoadLifter 5000 Pro Series
Helps eliminate vehicle squat, trailer sway, body roll, and trailer bounce. better ride comfort, enhanced towing ability, and better handling and corner performance.
Air Lift
WirelessOne Tank with EZ Mount
Single-path, wireless control system with a standard-duty compressor, a 2-gallon auxiliary air tank, and convenient wireless control, providing on-the-go adjustability and an easily accessible air supply wherever you need it.
VIAIR
Dual Mounted System
This high-performance onboard air system is designed to provide high CFM and fast tire fill with unsurpassed durability.
OnX Offroad
Elite Membership
onX Offroad is the most trusted trail map and GPS navigation app for off-roading and snowmobiling, with over 700K miles of guided trails and 852 million acres of public land access. Explore confidently outside cell coverage using Offline Maps, turn-by-turn guidance, ride tracking, and condition reports.
Isotherm
Cruise 65 Clean Touch Stainless Steel
available in 12 V DC and 110 V AC powered unit, constant operation on shore-power. Designed for dependable service in tough Marine and RV environments. The Clean Touch style features a high-tech finish that protects against abrasion, stains, sun, salt and UV, each unit is included with a mounting frame (flange) for easy installation.
zoleo
Satellite Communicator
When outside cell coverage, ZOLEO uses the Iridium satellite network — the only network to cover 100% of Earth, including all landmasses, oceans and Polar Regions — to send or receive messages. When within cell coverage, ZOLEO delivers messages over cellular and Wi-Fi.
Rig Ready Systems
Jackout Emergency Kit
The RRS JackOut is a top-of-the-line, all-inclusive emergency kit built to tackle a wide range of critical situations. Housed in a rugged Nanuk Hard Case that’s IP67 waterproof-rated, it’s as tough as the terrain you’ll face.
SwitchPros
SP9100 SWITCH PANEL POWER SYSTEM
Fully programmable and customizable solid state power distribution system. RCR-Touch®8 cover, snaps on for ease of specific switch selection while wearing gloves or riding rough terrain.
Tackform
TRAXX™ Slim Track Dash Bracket
Forged for the extreme, this all-metal bracket is made from high-grade billet aluminum and CNC machined for absolute precision. provides rock-solid stability, keeping your devices locked in place through relentless vibrations, steep inclines, and unforgiving landscapes.
Midland USA
MXT575 MicroMobile® GMRS 50-Watt Two-Way Radio
Features a Fully-Integrated Control Microphone ideal for vehicles with limited dashboard space, allowing the radio base unit to be stashed away. With 50 Watts of broadcasting power, this radio is the most powerful GMRS radio allowed by law.
Midland USA
MicroMobile® Highland™ 3dB Gain Heavy-Duty Bull Bar Antenna System
Coming in with 3 dB, this bull bar antenna casts a taller signal, making it ideal for performance in areas with a heavy-obstruction density like mountains, forests, and high deserts. It’s 28.5 inches in height and comes with a heavy-duty spring base for installation.
redzone wireless
Cradlepoint-Ericcson X-10 Router
Engineered to provide robust, high-speed connectivity in a wide range of scenarios, from busy urban work environments to remote outdoor adventures.
Xantrex
Freedom X 2000 Inverter & Remote
Premium performance in a lightweight compact package to convert your power from DC to AC. It cranks out full output from -4°F – 104°F for operation in all climate temperatures.
Opinel
Nomad Cooking Kit
The five-piece Nomad Cooking Kit is the adventure-ready gear you need to create a great meal outdoors, from quick picnics at the viewpoint to full meals prepared at your campsite.
Vision X
Explora Series 6" and 7"
X-Drive LED technology, pumping out 12,240 lumens through twelve high-output LEDs.
Truma
AquaGo
The Truma AquaGo is the industry’s first hybrid, on-demand water heater. This revolutionary water heater brings the luxury of hot water reliably around the clock for showering, hand washing, and doing dishes.
truma
VarioHeat
The Truma VarioHeat comfort is a compact, luxury RV furnace perfect for travel trailers, motorhomes, and vans. Its small size means that it can be installed in even the smallest RVs while still leaving plenty of room for storage.
ONWRD Supply
ON2 Vehicle Organizer
Seat-back storage solution, built to handle everything from daily errands to off-road expeditions. Its fully configurable MAP System features six rows of Velcro loop—top bound and bar tacked at every intersection—offering endless customization. A discreet zippered “Smuggler” pocket on the back panel provides hidden storage for a laptop or maps, while a built-in carry handle makes it easy to move from garage to rig.
ONWRD Supply
ON3 Vehicle Organizer
Features three rows of Velcro loop for modular attachments and two large organizer pockets at the base—one with a cargo flap and another with a zippered closure and front stash pocket. Like the ON2, it includes a “Smuggler” pocket for concealed laptop storage and a carry handle for easy transport. The ON3 attaches securely to most bucket seats and includes reinforced Hypalon corner tabs with metal grommets for semi-permanent mounting.
ONWRD Supply
headrest
Multi-functional upgrade designed for comfort and added storage. It features an EVA foam-padded head support, an integrated sunglasses pocket across the top, and a full-zip storage case on the reverse side. Two Velcro loop mounting points—top bound and bar tacked—allow modular connectivity for ØNWRD accessories.
Forrest Tool Co
THE SIGNATURE EDITION MAX®
Heavy-duty steel finished in a matte black texture powder coat combined with an exquisite, supple yet strong latigo leather case make this Signature Edition MAX® the perfect gift for an outdoor enthusiast to take on adventures, whether in the jungle, climbing rocky peaks, or fighting the good fight in the city.
Lavabox
Portable Campfire
Perfect not just for camping, but also for tailgating, beach days, and festivals, we’re totally in love with this Lavabox Portable Campfire setup for campfire kitchen solutions.
Sackcloth & Ashes
Blanket
Blankets are sustainably made from 100% recycled materials. They’re the perfect addition to any overland rig: warm, durable, and purpose-driven. For every blanket purchased, we donate one to a homeless shelter in or near the zip code where it’s shipped.
2024 ultimate build
In 2024, the Ultimate Overland Vehicle Build was a purpose-built GMC AT4X Canyon that’s equal parts trail crusher and mobile basecamp. Outfitted with premium gear, rugged upgrades, and plenty of attitude, this midsize beast is ready for long-haul adventures and off-the-grid exploration. Whether you’re chasing remote campsites or winding through backcountry trails, this Canyon is built to go further, carry more, and look good doing it.
Get Involved
There are so many great ways to get involved with the Overland Expo Foundation! Learn more about how together we can make a difference.