Torque Converter: Notes
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, 2003 Chevrolet Cab & Chassis Silverado, and 2002 GMC Sierra. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Allison recommends only use of genuine Allison torque converters with this transmission. Using other makes of torque converters will invalidate Allison transmission warranty.