GM Service Manual Online
For 1990-2009 cars only

Charge Air Cooler Cover Cleaning and Inspection


Object Number: 2156831  Size: SH

Inspect the cover for the following:

    • Damaged seal surfaces (1)
    • Leaking, restricted, or damaged charge air cooler (2). Refer to Supercharger Assemble.

Supercharger Cleaning and Inspection


    Object Number: 2156832  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.