1999 - 2006 (GMT800) Section for all discussion related to the 1999-2006 Chevrolet and GMC trucks.

Allison transmission overheating light

Old Sep 12, 2023 | 5:53 PM
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Default Allison transmission overheating light

2001 2500 HD 8.1 with Allison transmission, the overheating light comes on and sometimes has a hard shift. Other times the light may come on right after start up. Have changed filters and fluids. Really hoping it’s a simple fix, anyone with information please respond.
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