Break up alert! General Motors is done with Allison Transmission as their contract ends. They'll no longer wear that ...

The two brands have worked together for decades, but they couldn't reach an agreement to extend their longstanding licensing deal.

After more than two decades working together, General Motors and Allison Transmission are officially splitting up.

Next year, heavy-duty GM trucks will lose their Allison badges, even though the transmissions themselves won't change.

When GM launched new-generation trucks for the model year 2020, the Allison automatic was gone. The trucks still got the ...

General Motors’s (GM) all-new Class 4/5 commercial truck – which is being developed jointly with Navistar and set to debut next year – will get GM’s Duramax engine under the hood and will be matched ...

Here's what you need to know about the new Duramax powerplant, considering current events: Warren, Michigan-based engineers for the 2016 GMC Canyon and Chevrolet Colorado diesel began with a 2.5-liter ...