The 2026 Mack MD service truck equipped with a Stellar Mechanics Body is a purpose-built solution for demanding fleet and jobsite operations, combining rugged performance with intelligent service design. Powered by a reliable Cummins ISB6.7 engine paired with an Allison automatic transmission, this Mack MD delivers the strength, drivability, and durability operators expect, while its air-ride suspension, optimized axle capacities, and stable wheelbase provide confident handling under load. The Stellar Mechanics Body enhances productivity with organized storage, durable construction, and field-service functionality, creating a professional, heavy-duty service platform engineered to maximize uptime, improve technician efficiency, and lower total cost of ownership. Ask about Financing & Purchased Coverages.