For those familiar with the annual SEMA exhibition in Las Vegas, you'll understand the exceptional offering of this SEMA Build 2021 GMC Sierra 4WD Crew Cab AT4. The "Specialty Equipment Marketing Association" event is a showcase of companies specializing in aftermarket products for automobiles, especially trucks. Consequently, every heavy-duty pickup featured at SEMA is brimming with a treasure trove of high-end aftermarket enhancements. With a mere 5,250 miles on the odometer, our featured 2021 GMC Sierra 4WD Crew Cab AT4 is now available for sale in California, boasting a plethora of captivating upgrades.
The first striking feature of this 2021 GMC Sierra 4WD Crew Cab AT4 SEMA Build is its towering presence, draped in commanding Ebony Twilight Metallic. It proudly stands on a 12-inch Cognito Lift, creating an imposing figure on and off the road. Rolling on 28x16 Brushed Maxed Forged Wheels, adorned with True Spike lug nuts, and enveloped by aggressive 40" Fury tires, this off-road titan is ready for any terrain. The exterior enhancements include painted factory headlights, Recon taillights, Fusion bumpers with Rigid lights, and LED rock lights for enhanced visibility in low-light conditions. Graceful entry is provided by Amp Power steps, and a backflip bed cover conceals your cargo. At the rear, you'll find a B&W adjustable hitch and the unique Hornblasters Spare Tire Replacement Horn. Every inner guard is meticulously lined, and the intricate details extend to Carbon Fiber-wrapped torsion bars and driveshaft, an AFE rear differential cover, and fully painted suspension and axles. This Sierra Crew Cab, equipped with the AT4 Premium Package, offers a comfortable interior, featuring Jet Black with Kalahari Tan Accents. The front heated and cooled seats provide a luxurious seating experience. As you settle in, you can savor the auditory delights delivered by the subwoofer box concealed under the rear seat.
Beneath the Ebony Twilight hood of the 2021 GMC Sierra 4WD Crew Cab AT4 resides a robust 6.6L Duramax V8 Diesel engine, mated to an Allison 10-speed automatic transmission. With a formidable 445 horsepower and a substantial 910 lb.ft of torque at its disposal, this truck is a potent hauler. The S&B intake ensures the engine breathes clean air, while the Magnaflow exhaust system contributes to a vigorous and commanding exhaust note, signaling the power within.
2021 GMC Sierra 2500HD 4WD Crew Cab AT4
Custom Built for SEMA Show
Duramax 6.6L V8 Turbo-Diesel
Allison 10-Speed Automatic
4x4
Ebony Twilight Metallic Exterior
Jet Black With Kalahari Tan Accents Interior
Auto-Locking Rear Differential
2-Speed Autotrac Transfer Case
Traction Select System W/ Off-Road & Tow-Haul Mode
220 AMP Alternator
Heated/Ventilated Front Seats
Rear Heated Outer Seats
Heated and Leather Wrapped Steering Wheel
AT4 Premium Package
12″ Cognito Lift With Fox Shocks
28”×16” Brushed Maxed Forged Wheels
40″ Fury Tires
Hornblasters Spare Tire Replacement Horn
Fusion Bumpers
Rigid Lighting
Recon Taillights
Amp Power Steps
AFE Rear Diff Cover
Painted Suspension + Axles
Full Color Match
Stub Antenna
S&B Intake
Magnaflow Exhaust
Fusion Bumpers With Rigid Lights
P3 Billet Tow Hooks
Painted Factory Headlights
Painted Mirrors With Switchbacks
Backflip Bedcover
Subwoofer Box Under Rear Seat
LED Rock Lights
True Spike Lug Nuts
B&W Adjustable To Hitch
Carbon Fiber Wrapped Torsion Bars And Driveshaft
All Innergaurds Have Been Lined
2 Owners
The GMC Sierra 2500 Custom Camper from the early 1970s stands as a quintessential example of American pickup design, combining durability, simplicity, and unmistakable style. This 1972 GMC Sierra 2500 Custom Camper, finished in an eye-catching two-tone white and orange color scheme, captures the spirit of the era perfectly. Powered by a 350 cubic-inch V8 engine paired with a manual transmission and rear-wheel drive, it delivers the dependable performance and rugged capability that made GMC trucks a trusted choice for hard work and adventure alike. With just over 42,000 miles reported and equipped with factory air conditioning, this well-preserved example blends period-correct charm with everyday usability—making it an ideal collectible for enthusiasts who appreciate honest, classic American craftsmanship.
GMC’s Sierra is the slightly more luxurious and plusher cousin of Chevy’s Silverado. Since 1999, these two GM products have shared platforms, powertrains, and more. Today’s 2021 GMC Sierra 2500 Denali SEMA Build is from the fourth generation Silverado, which is the fifth generation Sierra. More interestingly, the current owner tells us that this truck is a SEMA (Specialty Equipment Market Association) build. With a mere 11,305 miles on the clock, this one-off truck could be your ticket to a super slick ride that’s a head-turner, and something quite special to behold.
The GMC Sierra and its stablemate, the Chevy Silverado, are well-known pickup trucks in the United States. The Sierra nameplate first appeared in 1988, as a rebadged variant of the fourth-generation Chevrolet C/K Series. These workmanlike pickup trucks are renowned for their no-nonsense demeanor, tough outlook, and impeccable reliability. Small wonder, then, that this 1997 GMC K2500 Sierra SLE looks so good, what with its mere 68,000 miles on the clock. The current owner says that the truck bears its original mileage, is up-to-date with servicing, and comes with two keys included at sale. So, if you want a classic vehicle that’s different, choose this 1997 GMC K2500 Sierra SLE.
The GMT400-generation GMC Sierra is remembered for its durability, clean styling, and capability, offering a blend of workhorse toughness and daily comfort. This 1995 GMC Sierra 1500 SL, finished in Dark Garnet Red Metallic over a burgundy interior, is powered by a 5.7-liter naturally aspirated V8 with throttle-body injection, paired to a 4-speed automatic transmission and selectable four-wheel drive. Showing 117,297 miles, it comes equipped with a Convenience Package, power features, and a sliding glass sunroof, making it both practical and comfortable while retaining the charm of a mid-1990s American pickup.
The GMC Sierra 2500 Custom Camper from the early 1970s stands as a quintessential example of American pickup design, combining durability, simplicity, and unmistakable style. This 1972 GMC Sierra 2500 Custom Camper, finished in an eye-catching two-tone white and orange color scheme, captures the spirit of the era perfectly. Powered by a 350 cubic-inch V8 engine paired with a manual transmission and rear-wheel drive, it delivers the dependable performance and rugged capability that made GMC trucks a trusted choice for hard work and adventure alike. With just over 42,000 miles reported and equipped with factory air conditioning, this well-preserved example blends period-correct charm with everyday usability—making it an ideal collectible for enthusiasts who appreciate honest, classic American craftsmanship.
GMC’s Sierra is the slightly more luxurious and plusher cousin of Chevy’s Silverado. Since 1999, these two GM products have shared platforms, powertrains, and more. Today’s 2021 GMC Sierra 2500 Denali SEMA Build is from the fourth generation Silverado, which is the fifth generation Sierra. More interestingly, the current owner tells us that this truck is a SEMA (Specialty Equipment Market Association) build. With a mere 11,305 miles on the clock, this one-off truck could be your ticket to a super slick ride that’s a head-turner, and something quite special to behold.
In 1948, Britain’s Rover Company introduced its first four-wheel-drive civilian vehicle, the Series I, inspired by the American Willys-Overland Jeep. Built with an aluminum body, a box-frame chassis, and exceptional off-road capability, it established the foundation for one of the most iconic 4x4 lineups in history. Through the years, the Series I evolved into the Series II, Series III, and finally, by the early 1990s, the Defender. While enhanced with mechanical and comfort upgrades, the Defender preserved its rugged charm and utilitarian character. This 2000 Land Rover Defender 90, recently imported to the United States in 2025 and currently located in Florida, embodies that enduring legacy. The short-wheelbase 90 variant was designed for agility and off-road excellence, powered here by a 2.5-liter turbocharged inline-five diesel engine paired with a five-speed manual transmission and dual-range transfer case, delivering robust torque and dependable performance across all terrains.
There are numerous names that spring to mind when you think of the off-roading industry's American cult classics. One of the best options on the list is the Jeep Wrangler. You don’t get many go anywhere vehicles with the capability to remove the roof and doors. What we have brought to you here is a stunning example of a 2016 Jeep Wrangler Unlimited Rubicon. Named after the famous Rubicon Trail, the Rubicon is the most off-road-capable version of the Wrangler. It differs from the base model with features such as front and rear electric diff locks, electric sway bars, upgraded axles, and Stiffer off-road trail-focused suspension. The example you see here reportedly has just 67000 miles on its odometer. Located in Sebastopol, California, it eagerly awaits its new owner.
Jeep’s Wrangler is well-known as an off-roader with removable doors and a detachable roof. There aren’t many vehicles that fit that bill today – Ford’s Bronco is the only other one, actually. This makes the Wrangler a firm favorite among enthusiastic off-roaders who need their primary mud-plugger to also be their family transporter. That’s why we’re sure this 2017 Jeep Wrangler Unlimited Sport 4x4 won’t have any trouble finding a new home. Coming from the third or JK generation of Wrangler, this 35,624-mile four-by-four currently resides in Herndon, Virginia. It’s got the Sport Package 24S, a premium black Sunrider soft top, an aftermarket lift kit and many more goodies to offer.
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