WARNING: This page is about a different car, the 2004 Pontiac Sunfire, 2004 Chevrolet Classic, and 2004 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Checking 2nd Clutch With Air Pressure
Courtesy of GENERAL MOTORS CORP.
Air check the 2nd clutch (95) in order to verify proper operation of the seals and piston assembly.