GM Service Manual Online
For 1990-2009 cars only
  1. Service the air compressor air strainer filter, if equipped. Refer to Air Compressor Air Strainer Filter Replacement .
  2. Check all of the air compressor bracket fasteners for looseness.
  3. Tighten the air compressor bracket fasteners as needed. Refer to Fastener Tightening Specifications .
  4. Check the air compressor discharge pipe for carbon restriction.
  5. Clean or replace the air compressor discharge pipe, as needed.