Front Propeller Shaft
WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, 2002 Chevrolet Cab & Chassis Silverado, and 2001 GMC Sierra. However, it is still accessible from the selected car via links, so may be relevant.
The front propeller shaft transmits rotating force from the transfer case to the front differential when the transfer case is engaged. The front propeller shaft connects to the transfer case using a splined slip joint.