Mack Trucks today announced the expansion of its natural gas-powered truck offerings to on-highway and vocational models. The OEM also said that it has “taken a key step forward” in its hybrid-vehicle development process and that it is continuing to investigate other alternative driveline technologies.

The OEM said it will offer natural gas-powered versions of its on-highway Pinnacle and vocational Granite models in 2013. Both models will be powered by the Cummins Westport ISX12 G engine. Mack noted that customer testing of those trucks is slated to begin this year.  The truck maker already offers natural gas-powered TerraPro low-entry and TerraPro cabover refuse-truck models.


Like the TerraPro natural-gas models, the natural gas-powered Pinnacle and Granite trucks will have a maintenance-free after treatment system and require only a three-way catalyst to meet EPA 2010 and CARB emissions standards, which Mack stated sets “a new benchmark for lower alternative fuel vehicle lifecycle costs and improving customers’ return on investment.”