GM first confirmed that it was selling Allison Transmission back in 2007, handing the historic company off to a pair of private equity firms, Carlyle Group and Onex Corp., for $5.6 billion. Since the 2020 model year, the Chevrolet Silverado HD and GMC Sierra HD have used GM's own 10L1000 transmission. It might seem surprising, then, to see Allison Transmission badges still appearing on brand-new GM HD pickups. Then, in February 2026, GM changed course, announcing that it had struck an agreement with Allison to keep its badges on the trucks. A GM spokesperson told The Drive that the deal "reinforce[s] to customers that Chevy and GMC HD Trucks are equipped with trusted, Allison-branded 10L1000 10-speed transmission[s]."