Mack Trucks this week debuted the new Mack Keystone, a new Class 8 vocational tractor, and showcased the all-new Mack Granite. Monday evening at Las Vegas Motor Speedway, with fireworks, music, and even a fleet of drones flying in the shape of the Mack bulldog, the new trucks rolled in off the track to take center stage in front of bleachers packed with customers and media.

Stephen Roy, president of Mack Trucks; Jonathan Randall, president of Mack Trucks North America; and even Martin Lundstedt, president and CEO of the Volvo Group, all donned cowboy hats in front of the Mack fans as the new trucks arrived.

The Mack Keystone

“The Mack Keystone represents our commitment to providing customers in agriculture, construction, and vocational markets with a truck that’s as capable on rough terrain as it is on the highway,” Roy said. 

He explained how the new truck is named after Pennsylvania, the Keystone State, where all Mack Class 8 models for North America and export are assembled at Lehigh Valley Operations in Macungie.

“The Keystone continues Mack’s tradition of building rugged, reliable trucks that work as hard as the people who drive them,” he added.

The Keystone builds on the legacy of the Mack Pinnacle, which has been in Mack’s product lineup for more than two decades. The Keystone delivers all the same advanced technology and safety as the Mack Pioneer, the new Mack Anthem, and the new Mack Granite.

This unified platform enables the Keystone model to offer identical comfort features, safety systems, and performance technologies while maintaining the heavy-duty characteristics essential for vocational tractor applications.

“Our customers told us they wanted a truck that could handle the toughest jobs and job sites without compromising driver comfort or modern technology,” Randall said. “The Keystone delivers exactly that: terrain versatility to navigate challenging road conditions, combined with the best ride quality in the business.”

Designed for Varied Terrain

The Keystone is engineered for fleets that need a truck capable of performing both on and off the highway. Key to this capability is the Keystone’s higher ground clearance, approach angle, and suspension system. Plus, the available Mack Maxride suspension is specifically engineered to deliver ultimate performance on the demanding road conditions, whether on the highway or across rough terrain. 

“The Keystone is designed for terrain versatility; it thrives where the roads are unpaved, uneven or even nonexistent, then transitions seamlessly to highway driving,” said Fernando Couceiro, Mack Trucks vice president of highway trucks. “Whether you’re hauling logs out of a forest, delivering heavy equipment to a construction site, or transporting agricultural goods across rural roads, the Keystone is built to handle it all.”

Mack is offering the Keystone in both axle-forward and axle-back configurations, and in three cab configurations: day cab, 44-inch sleeper, and 64-inch sleeper. Each cab configuration is available in both axle positions, and rear axle configurations include 6x4, 8x4, and 8x6.

Driver-Centric Interior Design

The Keystone shares its interior architecture with the Mack Pioneer and features wrap-around controls and high visibility. 

“We designed every element of the Keystone interior with the driver in mind –from the wrap-around controls that keep everything within easy reach, to the ergonomic grab bars that make entering and exiting the cab safer and easier,” said Vince Lokers, specialist chief designer, Mack Trucks. 

The interior features an electronic braking system for easier operation, an available digital mirror system, a flat-bottom steering wheel designed for improved belly room, an integrated ELD plate, device holders, and cord management systems.

New Exterior Design

The Keystone features an exterior design that Mack said balances modern aesthetics with the rugged characteristics expected of a vocational tractor. The design team drew inspiration from Mack’s heritage, including design elements reminiscent of the iconic Mack R Model, while incorporating contemporary styling that aligns with Mack’s current product family.

“We designed the Keystone to look like it can handle anything because it can,” said Lukas Yates, expert chief designer at Mack Trucks. “The gloss black grille bar, polished aluminum-clad bumper center, and refined fender profile give the Keystone a distinctive presence that’s unmistakably Mack, while maintaining a cohesive family appearance with our Pioneer, Anthem, and Granite models.”

The Keystone introduces a new modular bumper system designed to accommodate various tow configurations while maintaining a clean, functional appearance. A new bullet lamp on the cab roof provides improved visibility and compliance, contributing to the truck’s distinctive character. 

Powered by the Mack MP13

The Keystone is powered exclusively by the Mack MP13 engine, delivering up to 540 horsepower and 1,950 lb.-ft. of torque to tackle the most demanding heavy-haul applications. Paired with the mDRIVE HD automated manual transmission, Mack said the Keystone delivers smooth, efficient power transfer in any terrain. 

The advanced powertrain delivers up to 6% improved fuel efficiency compared to the Pinnacle, helping customers reduce operating costs without sacrificing performance. The Keystone also offers the Mack Protect safety suite available on the Pioneer and Anthem.

The Keystone comes standard with Mack’s integrated uptime solutions, including a complimentary five-year subscription to Mack Connect, Mack’s telematics platform that provides real-time vehicle monitoring, remote diagnostics, and proactive service scheduling to keep trucks on the road and productive.

“When you're operating on challenging roads, ride quality becomes even more important,” Couceiro said. “The Keystone’s suspension and cab engineering deliver an unmatched smooth, comfortable ride that reduces driver fatigue, even in the most demanding conditions. Combined with Mack’s legendary durability, the Keystone is built to perform mile after mile, year after year.”

The all-new Mack Keystone will be available for order through Mack’s dealer network in the late third quarter of 2026.

All-New Mack Granite

“The all-new Mack Granite embodies everything Mack stands for: legendary durability, uncompromising performance, and a commitment to our customers who depend on these trucks to get the toughest jobs done,” Roy said. “We’ve completely reimagined the Granite from the ground up, bringing the same level of innovation we delivered with our Pioneer and Anthem models to the vocational market.”

Safety-Focused Technologies

Mack said the all-new Granite sets a new standard for safety in the vocational segment, introducing multiple industry-first technologies that bring advanced protection to demanding work environments.

The available Mack Protect safety suite includes front camera, front radar, and 270-degree radar coverage with both passenger-side and driver-side radar systems. Having both driver-side (left-hand) and passenger-side (right-hand) radars is a first for the vocational segment, according to Mack.

Mack also said the Granite is the first vocational truck to feature an Electronic Park Brake (ePark Brake) with rollaway protection, along with auto-release when shifting into gear. Additional safety features include standard front and available side-curtain airbags, standard LED headlamps, and fog lamps with available cornering lights. 

Standard on every all-new Granite is E911 auto-call, which automatically contacts emergency services when in cellular service range, if an airbag deploys or the system detects a rollover or collision, another first for the vocational segment, according to Mack.

An optional proprietary camera system provides up to five camera inputs, including backup camera and downward-facing passenger-side camera for enhanced visibility of certain blind spots, particularly useful for certain customers in urban operations. An optional Digital Mirror System is also available.

“We’re bringing safety technologies to the North American vocational market that have never been available before,” said Alex Lee, Mack Trucks senior product manager for vocational and medium duty. “Features like the ePark Brake, 270-degree radar coverage, and E911 auto-call are going to make a real difference in protecting drivers who work in some of the most challenging environments.”

Configurations & Availability

The all-new Mack Granite will be available in day cab and 44-inch sleeper configurations in both axle-forward and axle-back positions, with multiple front and rear axle ratings to handle specific customer requirements. 

The truck is offered with graphite and bright trim packages, with features including LED headlights, three-piece bumper options, and an available sun visor. An optional hatch provides fluid access for snowplow applications.

The new Granite will be available for order in the latter half of 2026. Production of the all-new Mack Granite will begin in January 2027, at Mack’s Lehigh Valley Operations facility in Macungie, Pennsylvania.

Built for the Vocational Market

The Granite features the new Mack MP13 engine, delivering greater power, up to 540 horsepower, and 1,950 lb.-ft. of torque, while providing up to 3% improved fuel efficiency compared with the previous engine. 

The updated Mack mDRIVE automated manual transmission, available in 12-, 13-, and 14-speed configurations, provides 30% faster shifts for improved responsiveness and shift quality, according to Mack.

The 13-speed features a low reduction creeper gear for improved startability on steep grades and with heavy loads. The 14-speed features a 32:1 ultra-low-speed reduction gear ideal for precision work like curb pouring and loose soil conditions. The Granite also offers a Cummins X10 engine, rated from 350-450 horsepower and 1,250-1,650 lb.-ft. of torque, with an Allison automatic transmission. 

The Granite offers the new MaxRide air load-distributing suspension, a non-torque reactive eight-bag system proprietary to Mack that delivers superior ride quality and load management.

“Ride quality matters in vocational applications; our customers are navigating job sites, rough terrain, and city streets all in the same day,” said Tim Wrinkle, vice president, product owner, vocational and medium duty at Mack. “The Granite’s MaxRide air suspension delivers a smoother, more comfortable ride that helps reduce driver fatigue and keeps drivers performing at their best.”

New Cab Delivers More Space & Comfort

The Granite features an all-new galvanized steel cab that is significantly larger than its predecessor, with nine inches of additional width at the B-pillar for increased interior volume and driver comfort. The cab meets all ISO safety standards and passes the stringent Swedish Impact (BOF10) test.

A new ImpactShield one-piece bonded curved windshield provides improved durability and impact resistance, while the shorter 113.5-inch bumper-to-back-of-cab dimension in both axle-forward and axle-back configurations simplifies bodybuilder adaptation and ensures compliance with regulatory requirements across all markets.

Driver Feedback Interior Design

Mack said the all-new Granite’s interior was designed with input from more than 30 professional drivers through an unbiased clinic at Virginia Tech, based in Blacksburg, Virginia, where drivers without knowledge of the Mack brand rated prototypes and provided feedback on ergonomics, placement of controls, and visibility.

“Everything in this cab was designed around the driver,” Lokers added. “We focused on creating a driver-centric, commanding, ergonomic layout with wrap-around controls and high visibility. Features like our new steering column-mounted shifter, flat-bottom steering wheel, and electric brakes were all positioned in their best ergonomic position based on direct driver feedback.”

The interior is available in three trim levels and features a new digital instrument cluster, updated materials and features carried over from the Mack Pioneer and the new Anthem, and an all-new three-way-adjustable steering column. 

An available premium air-shock seat offers four-way lumbar support, massage, and heating/ventilation functions. 

The new door panel design incorporates HVAC ducting that delivers heating and cooling at the driver’s shoulder, a feature borrowed from the automotive segment for enhanced comfort.

A new bodybuilder tower positioned between the seats provides a convenient mounting surface for body builder controls, gauges, and equipment. It can also be optioned as additional storage with a lid, which is critical in day cab applications.

The interior also includes built-in productivity features like the aluminum top-of-dash t-slot and side-of-dash accessory mounting plate, providing reinforced, easy-to-access mounting locations for ELDs and other devices. Standard top of dash dual USB-C, 12-volt auxiliary power outlets, and an available wireless phone charger add convenience to power multiple devices.

Exterior Design Inspired by Mack’s Heritage

The all-new Granite’s exterior design was developed in parallel with the Mack Pioneer, ensuring a consistent brand language across the entire Mack lineup. 

The hood profile draws inspiration from the iconic Mack R model, with a lowered side air intake that provides increased visibility in front of the A-pillars while maintaining vertical space up front for a higher-performing cooling package.

“The Granite was not just an adaptation of the Pioneer,” Yates said. “This is an all-new platform that was created to be applicable in both highway and vocational applications. We wanted this truck to look tough and confident going down the road, built to be very rugged and handle anything. The design emphasis was on durability and functionality while maintaining the Mack DNA that our customers recognize and trust.”

The new stainless steel grille represents a significant advancement in quality and durability. “This is the best grille we’ve ever done on a truck,” Yates added. “It’s very strong and rigid, with a level of quality I haven’t seen on anything else.”

A new modular bumper system addresses the complexity of vocational applications, which traditionally required more than 60 bumper variants to accommodate different tow and axle configurations. 

The new design features a common centerpiece that accommodates both center and side tow configurations, with interchangeable end caps for axle-forward and axle-back positions. This innovative approach maintains all customer options while dramatically improving production efficiency. The stamped three-piece bumper integrates cornering and fog lamps in what Mack called a robust, durable solution.

New LED bullet lamps on the cab roof provide a clean, modern aesthetic while meeting regulatory clearance and identification lighting requirements. A new axle-forward headlamp maintains the same lighting performance and signature Mack ‘M’-shaped daytime running light as the axle-back version in a more compact package.

BodyLink IV: Advanced Bodybuilder Integration

The all-new Granite introduces the latest generation of BodyLink IV, featuring a completely redesigned electrical architecture that enables new, customizable logic and diagnostics. 

The system supports flexible switches and system controllers that can be programmed, enabling virtual interlocks and automations to improve upfit, productivity, and safety.

Connectivity & Uptime

The all-new Granite keeps fleets connected and running with Mack Connect telematics, providing real-time visibility into vehicle location, performance, and health. Over-the-air (OTA) updates enable remote software updates to one truck or the entire fleet, minimizing downtime and service visits. 

The MyMack mobile app gives drivers and fleet managers convenient access to critical vehicle information from anywhere, while remote diagnostic capabilities help identify issues before they become costly problems.