GM Service Manual Online
For 1990-2009 cars only

    Object Number: 345363  Size: SH
  1. Install the intake manifold flange (2).
  2. Install the intake manifold flange bolts (1).
  3. Tighten
    Starting from the center and moving outward, tighten the intake manifold flange bolts to 20 N·m (15 lb ft).