WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Checking Direct And Coast Clutch With Air Pressure
Courtesy of GENERAL MOTORS CORP.
Air check the direct clutch in order to verify the proper operation of the seals and clutch assembly.
Air check the coast clutch in order to verify the proper operation of the seals and clutch assembly.