Mack Trucks launches feature-rich Keystone vocational truck platform

Mack Trucks is revamping its vocational truck lineup on the heels of the launch of the Mack Pioneer on-highway truck last year. The all-new Mack Keystone, introduced at ConExpo-Con/Agg 2026, succeeds the Pinnacle, which has been a part of Mack’s vocational portfolio for more than 20 years.

With the launch of the Keystone and the redesigned Granite, Mack has created a unified technology and safety platform that offers identical comfort features, safety systems and performance technology for the Pioneer, Anthem, Granite and Keystone.

“Our customers told us they wanted a truck that could handle the toughest jobs and job sites without compromising driver comfort or modern technology,” said Jonathan Randall, president of Mack Trucks North America.

With a higher ground clearance, approach angle and improved suspension, the Keystone is engineered to handle rugged off-road terrain applications such construction, logging and livestock hauling, while still offering a comfortable on-highway ride. The available Mack Maxride suspension is specifically engineered to deliver ultimate performance on the most demanding road conditions, providing best-in-class ride quality whether on highway or rough terrain. 

“The Keystone is designed for terrain versatility,” said said Fernando Couceiro, Mack Trucks vice president of highway trucks. “It thrives where the roads are unpaved, uneven or even nonexistent, then transitions seamlessly to highway driving. 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.”

The Keystone is available only with the Mack MP 13 engine that delivers up to 540 horsepower and 1,950 lb-ft of torque, and the mDRIVE HD automated manual transmission. The advanced powertrain delivers up to 6 percent better fuel efficiency compared to the Pinnacle.

The Mack Keystone is available in both axle-forward and axle-back configurations and three cab configurations: day cab, 44-inch sleeper and 64-inch sleeper, each offered in both axle positions. Rear axle configurations include 6x4, 8x4 and 8x6.

The Keystone’s exterior takes some contemporary design cues from its on-highway siblings, and also a gloss black grille bar, polished aluminum-clad bumper center and refined fender profile for a refined, rugged appearance.

To maximize uptime, 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. Mack Trucks expects the Keystone to be available for order through its dealer network in the third quarter of 2026.