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In the cyclical heavy-duty truck market, what goes up must eventually come down, and that's exactly what happened to Mack Trucks in 2016.

Mack Trucks said it was developing an additional prototype of heavy-duty zero-emissions trucks for evaluation in Southern California, which has some of the worst air quality in the nation.

The parent company of Mack Trucks is planning to unload its governmental sales business area, which includes a North American defense division that is headquartered in Upper Macungie Township, Pennsylvania.

Mack Trucks said it has completed the rollout across its entire product line of its diagnostic and repair planning system, GuardDog Connect, adding it as a standard item most recently to its LR refuse models equipped with its standard MP engine.

Union workers at Mack Trucks have ratified a new, three-year labor agreement.

ALLENTOWN, Pa. — Mack Trucks rolled out its 2017 lineup, featuring four in-house engines designed to meet federal greenhouse-gas emissions standards that tighten Jan. 1.

ALLENTOWN, Pa. — Mack Trucks rolled out its 2017 lineup here, featuring four in-house engines designed to meet federal greenhouse-gas emissions standards for trucks that tighten on Jan. 1.

Mack Trucks Inc. and Volvo Trucks North America, both units of Volvo Group, said they renewed their contract with Decisiv Inc., which provides the ASIST service relationship management tool that both manufacturers use.