Mack Box Trucks For Sale in Colorado

Mack box trucks are well-suited for delivery and moving applications because they combine medium-duty maneuverability with commercial-grade chassis components. Common body lengths in this category are 24 to 26 feet, which gives enough cube for furniture, appliances, parcel freight, or route deliveries without making the truck overly difficult to place at docks, retail sites, or residential streets. Many units are also equipped with liftgates, E-track, scuff protection, and hardwood or composite floor setups that support repeated loading cycles.

Yes. A common buying point in this category is the availability of under-CDL specs, typically at or just below 25,995 pounds GVWR. That matters for fleets trying to expand the driver pool, simplify staffing, or keep a truck in local delivery service without requiring a CDL in situations where regulations allow non-CDL operation. Buyers should still verify state, federal, and application-specific requirements, especially if body upfit, liftgate weight, or cargo profile affects legal operating weight.

Many Mack MD6 box trucks are spec'd with the Cummins ISB 6.7-liter diesel and an Allison 2500 RDS 6-speed automatic transmission. That combination is popular because it is familiar to fleet maintenance departments, works well in pickup-and-delivery service, and delivers predictable drivability for a wide range of operators. Horsepower ratings often fall around 260 to 280 HP, which is generally appropriate for van bodies in this size class, especially when paired with rear axle ratios selected for local and regional work.

The body spec matters as much as the chassis. Buyers should look closely at interior height, floor construction, wall material, rear frame design, roll-up door type, and cargo securement features such as recessed E-track. Scuff liners, bulkhead reinforcement, roof construction, and corner protection all affect durability over time. If the truck will handle palletized freight, appliances, beverage product, or household goods, the liftgate rating and platform dimensions should also match the actual loading method and freight profile.

It is very important because Colorado operations can include urban delivery, mountain grades, and variable weather in the same week. Front axle and rear axle ratings directly affect legal payload and body compatibility, while rear suspension choice influences ride quality and cargo protection. Air rear suspension is a common spec in this category because it can improve ride characteristics for sensitive freight and help with dock approach consistency. Buyers should also compare wheelbase, brake type, and rear ratio to the intended route structure, especially if the truck will spend time in hilly terrain.