06:18 17-11-2025

Allison branding to vanish from GM Silverado and Sierra HD in 2026

GM will drop Allison branding on its 10-speed 10L1000 in Silverado and Sierra HD from 2026. Hardware stays same; dealers must de-brand stock by June 29, 2026.

General Motors’ nearly century-long partnership with Allison Transmission is nearing its end. The licensing agreement that allowed GM to badge its 10-speed gearboxes as Allison expires on December 31, 2025, and it won’t be renewed. GM develops and builds the 10L1000 in-house, while Allison took part in testing and validation — hence the familiar emblems on Silverado and Sierra HD.

From 2026, the Allison branding disappears. The new HD pickups — both Duramax diesels and gasoline versions — will retain the same transmission, just without any Allison mention on the body or in marketing. The manufacturer is ending production of all materials with that logo, and dealers can use remaining stock only until June 29, 2026. Any unsold vehicles will have to be officially de-branded.

The hardware itself stays the same — the change is in name only. For shoppers, though, that’s a chance to bargain: dealers are unlikely to keep inventory they’ll later need to reprocess. This transition effectively closes a long-running chapter of GM–Allison collaboration, when the badge stood as a shorthand for reliability in heavy-duty pickups.