GM Service Manual Online
For 1990-2009 cars only

Charge Air Cooler Cover Cleaning and Inspection


Object Number: 2085688  Size: SH

Inspect the cover for the following:

    • Damaged seal surfaces (1)
    • Leaking, restricted, or damaged charge air coolers (2, 3)

Object Number: 2085692  Size: SH

Inspect the water manifold for the following:

    • Damaged seal surfaces (1)
    • Leaking air bleeds (2)
    • Leaking coolant fill adapter (3)
    • Damaged coolant hose fitting sealing surfaces (4)

Supercharger Cleaning and Inspection


    Object Number: 2087838  Size: SH
  1. Inspect the supercharger for the following:
  2. • Damaged seal surfaces (1)
    • Worn or damaged belt pulley grooves  (2)
  3. Rotate the pulley of the supercharger by hand. The pulley and rotors should rotate freely with no binding.
  4. Operate the boost bypass valve by hand. The bypass valve should operate within the full range of motion with no sticking or binding.