C4 Clutch Piston Assembly
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.
NOTE:
Recommended method to remove C4 clutch piston is to use compressed air. If compressed air is not available, C4 clutch assembly may be removed using pliers.
If using compressed air to dislodge C4 clutch piston, position 3/8" air hose over both annulus holes. Apply compressed air until C4 clutch piston assembly is dislodged. See Fig 1.