False alarm: GM and Allison Transmission aren’t really parting ways after all

• General Motors won’t be removing the Allison Transmission badges from its heavy-duty pickup trucks after all.
• The announcement follows news last fall, when GM planned to stop using Allison badges and track down and remove existing badges.
• There has been no actual change to the transmission hardware, but the messy rift between GM and Allison has been ironed out for now.

The longstanding partnership between General Motors and Allison Transmission hit a rough patch last year when it was announced that GM’s heavy-duty trucks would lose their Allison badges. GM’s decision to not only stop using the Allison brand on new trucks, but also to track down unsold models and remove their Allison badges, was a testament to how vicious the breakup was.

Despite the hiccup, it appears that GM and Allison have ironed out their differences, with the two brands renewing their partnership. A spokesperson for General Motors confirmed this Car and driver that Allison badging will be added back to the production line for the 2026 Chevy Silverado HD and 2026 GMC Sierra HD lineups.

Despite the drama between the two brands, the hardware in the pickups has never been compromised. As of 2020, GM has used the 10L 1000 10-speed automatic transmission, which it co-developed with Ford. The new 10-speed was ultimately verified and approved by Allison, although the transmission company doesn’t actually build the units that end up in trucks.

GM hasn’t said exactly how many HD trucks have been produced without the Allison brand, but as far as we know there are no plans to retrofit them with the badge. Relationships can be tough and sometimes you have to buy flowers, and that’s exactly what we imagine someone from the Allison team did in this case.

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Jack Fitzgerald’s love for cars stems from his still unshakable addiction to Formula 1.
After a brief stint as a detailer for a local dealer group in college, he knew he needed a more permanent way to drive all the new cars he couldn’t afford, and decided to pursue a career in automotive writing. By chasing down his college professors at the University of Wisconsin-Milwaukee, he was able to travel across Wisconsin in search of stories about the automotive world before landing his dream job at Car and driver. His new goal is to delay the inevitable demise of his 2010 Volkswagen Golf.