After decades of gm hd trucks using allison transmissions, the partnership is ending on december 31, 2025 due to not coming to an agreement. Gm and allison transmission are parting ways after this year the two brands have worked together for decades, but they couldn't reach an agreement to extend their longstanding licensing deal. The longstanding partnership between general motors (gm) and allison transmission is set to end after this year This development will see the chevy silverado hd and gmc sierra hd models drop the. Your technicians can learn and speak basic allison transmission maintenance in our new learning center Explore allison doc subscription categories and manage your renewals, user assignments, and account settings with ease.
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