Input Speed Sensor
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.
Ensure oil pan is facing downward. If present, remove input speed sensor shipping cover. See Fig 1. Remove sensor retaining bolt and remove input speed sensor from converter housing. Remove sensor "O" ring.