The 2025 GMC Sierra Hennessey H600 is not just another pickup. This Onyx Black machine blends rugged capability with supercharged power. It’s designed for drivers who want both strength and refinement in one package.
Hennessey’s Signature Upgrade
Hennessey Performance transforms the standard Sierra into something extraordinary with the H600 package. The heart of this build is a 6.2-liter V8 engine fitted with a twin screw supercharger and an air-to-water intercooler. This combination pushes the truck to deliver 625 horsepower at 5,500 rpm and 611 lb-ft of torque at 4,200 rpm. With these numbers, the Sierra Hennessey H600 has the muscle to rival performance cars while keeping its truck versatility.
Engineered for Performance
The upgrades go beyond raw power. A stainless steel catback exhaust system with black tips enhances both performance and sound. HPE engine management calibration ensures all components work in harmony, delivering a smooth yet aggressive driving experience. Every build includes professional installation, chassis dyno testing, and up to 500 miles of road testing for peace of mind.
Distinctive Style and Presence
Visually, the 2025 GMC Sierra Hennessey H600 stands out with exterior badging that proudly showcases its supercharged identity. The Onyx Black finish pairs perfectly with Hennessey’s 24-inch performance wheels wrapped in upgraded street performance tires. It’s not just a truck; it’s a statement of power and luxury combined.
Comfort Meets Muscle
Inside, the Sierra maintains its reputation for premium comfort. The brown interior complements the bold exterior while offering modern amenities and space. This balance of upscale design and high-performance engineering makes the Hennessey Sierra H600 a unique proposition.
Built with Confidence
Each truck comes with a serial-numbered engine plaque, making it a collectible as well as a powerhouse. Buyers also receive a 3-year or 36,000-mile limited warranty, reflecting the confidence Hennessey has in its craftsmanship. Priced at $139,950 and showing only 150 miles, this Sierra offers a rare blend of exclusivity and usability.
Summary
The 2025 GMC Sierra Hennessey H600 is a perfect mix of muscle, luxury, and engineering precision. With 625 hp on tap, striking Onyx Black styling, and Hennessey’s attention to detail, it sets itself apart as a performance pickup built for those who want more than the ordinary.
Disclaimer: Vehicle details, pricing, and specifications are based on available information at the time of writing and may be subject to change.
