- SEMA Built 2021 Sierra 2500 AT4
- Ebony Twilight Metallic exterior
- Jet Black with Kalahari Tan Accents interior
- 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
- Current owner reports they are the second owner
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.
Exterior and Interior
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.
Engine
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.
The Chevrolet Silverado’s corporate cousin is the GMC Sierra. It’s a smart move by General Motors to broaden their line-up across their various brands by sharing synergies. In fact, the Silverado and Sierra have been like this since 1999, when the Silverado became a separate nameplate. Hence, the first generation Silverado/Sierra was made between 1999 and 2007. In fact, variants like this 2002 GMC Sierra 2500 SLT were only made up to 2004, as the heavy-duty line. This particular truck has done a light 64,000 miles and is up for sale in Orange, California. It’s got a 6.6-liter Duramax diesel under the hood, a 62-gallon fuel tank, and is four-wheel drive. That makes it ideal for someone who wants a sturdy truck that can venture off-road when needed.
The GMC Sierra has, and continues to be a sibling to the popular Chevrolet C/K-series of pickup trucks, now going around as the Chevrolet Silverado. This is a smart strategy by General Motors – offer two similar vehicles from two different brands, with broadly similar engineering and make some tweaks here and there to differentiate them accordingly. This allows you to broaden your customer base while optimizing your development and production costs. This 1972 GMC Sierra 2500 Custom Camper is thus based on the second generation Chevy C/K, and comes from West Wendover, Nevada. It’s got under 43,000 miles on the clock, and the Custom Camper plus Sierra trim packages. It also appears to have received some refreshment due to its excellent condition.
The GMC Sierra is the sister model of the Chevrolet Silverado, and it has been this way for several years now. But, the Sierra isn’t simply a badge-swap exercise. No, it’s sits a little higher than its Chevy sibling, thanks to offering more luxury interior appointments and better refinement. But, it retains the same purposeful ability to carry loads, tow trailers and even venture off-road if needed. So, if that sounds appealing, check out this 2024 GMC Sierra 2500 HD Crew Cab that’s for sale in Marina, California. This 12,536-mile truck has got a Duramax diesel under the hood, four-wheel drive and some tasteful modifications too.
Built to tackle the toughest jobs of its era, the 1968 GMC C3500 represents a time when durability and simplicity defined American heavy-duty trucks. Today, examples like this have become increasingly sought after thanks to their unmistakable styling and endless versatility. Showing 108,258 miles, this C3500 has been tastefully customized with a rugged flatbed while retaining its hardworking character. Power comes from a 350ci V8 backed by a 4-speed manual transmission, making it equally at home hauling equipment, attending truck shows, or serving as a standout addition to any vintage collection.
Square-body GMC pickups have become some of the most sought-after American trucks of the modern collector era, appreciated for their clean styling, durable mechanicals, and everyday usability. This 1988 GMC Sierra K1500 represents the final years of the iconic square-body design and offers the rugged simplicity that enthusiasts continue to seek. Showing approximately 141,863 miles, this truck is finished in Dark Carmine over a Red interior, a period-correct color combination that gives it an unmistakable late-1980s presence. Equipped with a dependable 5.7L V8, four-wheel drive, and several tasteful upgrades, this Sierra is equally at home as a weekend cruiser, local show truck, or dependable classic pickup.
Classic pickup trucks have become some of the most popular foundations for custom builds, and this 1946 GMC EC101 Restomod Pickup is an excellent example of why. Retaining the timeless styling that made post-war GMC trucks iconic while incorporating modern drivability and comfort, this professionally customized pickup offers the best of both worlds. Showing approximately 3,666 miles, this truck is finished in a striking Brandywine and Black two-tone exterior over a Beige interior. Highlights include a custom paint job, Dakota Digital instrumentation, Vintage Air climate control, a reupholstered cabin, custom running boards, and a dependable V8 powertrain, creating a unique classic that is equally suited for local cruise nights and weekend drives.
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