Mack Defense Presents M917A3 Heavy Dump Trucks to U.S. Army
The new HDTs will help increase the U.S. Army's operational effectiveness and readiness, while supporting mobility, counter-mobility, survivability, and sustainment operations for the Joint Force.

The 94,500 lb. GVWR M917A3 HDTs based on the Mack Granite model feature an all-wheel drive 8x8 configuration.
Photo: Mack Defense
Mack Defense announced it has delivered the first production of M917A3 Heavy Dump Trucks (HDT) to the U.S. Army and the U.S. Army Reserve.
The handover of the M917A3 HDT key and truck occurred during a ceremony at the MEC after comments from Mack Defense leadership, U.S. Army officials, and representatives of local and state officials.
“It’s an honor to write the next chapter in Mack’s rich history of producing vehicles for the U.S. armed forces on this dedicated line and deliver the first, new Heavy Tactical Wheeled Vehicle the U.S. Army has added to their portfolio in 12 years,” said David Hartzell, president of Mack Defense. “We look forward to fulfilling our current contract and the needs of the U.S. Army, delivering vehicles that have earned the acceptance of the armed forces through successful rounds of rigorous testing.”
The M917A3 trucks are part of the contract for HDTs.The Army uses dump trucks in its engineer units for maintenance missions and infrastructure assets, like roadways, airfields, landing strips, supply facilities, and motor pools.
In 2018, the U.S. Army awarded Mack Defense a contract potentially worth up to $296.4M over seven years to produce a minimum of 683 non-armored and armored M917A3 HDTs.
"Many of the Army's missions are within extremely austere environments, so if we need to build things to support combat or training operations, dump trucks are absolutely essential to the force," said Wolfgang Petermann, the U.S. Army's project manager for Transportation Systems, Program Executive Office for Combat Support & Combat Service Support (Detroit Arsenal, Michigan).
The 94,500 lb. GVWR M917A3 HDTs based on the Mack Granite model feature an all-wheel drive 8x8 configuration. An armored cab was also engineered, combining the comfort features and amenities of a commercial truck while adding force protection. The M917A3s are powered by 13L Mack MP8 engines, delivering 440 horsepower.
"Now is the perfect time to provide the Engineer Regiment with modified commercial off-the-shelf capabilities leveraging the strength of the commercial auto and heavy-duty trucking industry,” Petermann said. "Today's ceremony is a huge milestone in delivering that enhanced capability, which is better equipped to maintain the operational pace of the modern battlefield. I'm proud of the hard-working Heavy Dump Truck team that has brought us to this point."
More Vehicle Research

Paccar Updates MX-11 and MX-13 Engine Software to Enhance Customer Operations
Kenworth Truck Company and Peterbilt Motors Company will update software for vehicles equipped with Paccar MX-11 and Paccar MX-13 engines to ensure they comply with EPA guidance on diesel exhaust fluid inducements.
Read More →
GM #1 in U.S. Sales for the Second Quarter of 2026
General Motors said it was America’s #1 automaker in U.S. sales for the second quarter of 2026 with total sales of 714,896 vehicles, down 4.2%. GM led in full-size pickup and large SUV sales and reported growth in fleet sales.
Read More →
Volvo VNL and VNR Electric Join American Truck Simulator
Volvo’s VNL and VNR Electric are now in American Truck Simulator, bringing diesel and electric truck models to virtual drivers.
Read More →
Rush Enterprises Expands with Acquisition of Peterbilt of Louisiana
Rush Enterprises’ acquisition of Peterbilt of Louisiana adds 46 service bays, more than 23,000 square feet of parts storage, and approximately 107,000 square feet of facility space to the company's footprint.
Read More →
International HV515 Dump Truck Walkaround
The International HV515 combines the new S13 Integrated Powertrain, improved driver visibility, simplified maintenance, and advanced vocational controls into a capable dump truck platform. Take a closer look at the HV515, which International showcased at EUFMC.
Read More →
Chevrolet Brings Back 'Heartbeat of America' Campaign Featuring Trucks and Everyday Workers
Chevrolet brings back Heartbeat of America, spotlighting the trucks, workers, and communities that continue to drive the brand's legacy forward.
Read More →
Light-Duty Work Truck Fleets Get a Fresh, Affordable Alternative
Work Truck caught up with Drew Walker, Slate’s head of fleet sales, at the company’s design hub in Gardena, California, for an interview on how the company’s pickup and SUV electric vehicles can meet the needs of both private and public sector fleets.
Read More →
Ford Ranks First in JD Power Initial Quality Study, Ford & GM Icons Take First in Segments
Both Ford and General Motors vehicles ranked first in their respective segments in the JD Power 2026 U.S. Initial Quality Study, and Ford ranked as the mainstream brand with the highest initial quality.
Read More →
Beyond Utilization Rates: Smarter Fleet Replacement Decisions
Vehicle replacement decisions affect every aspect of fleet performance, from operating costs to asset availability. This guide explores how fleet leaders use integrated data, benchmarking, and lifecycle analytics to determine the right fleet size and optimize replacement timing with greater confidence.
Read More →
Nissan Produces 1-Millionth Frontier in Mississippi as Demand Grows for Midsize Work Trucks
Nissan's 1-millionth Frontier marks a major manufacturing milestone as contractors, utilities, and vocational fleets turn to capable midsize pickups.
Read More →
