GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Sierra - 2WD 🢒 Engine 🢒 Engine Mechanical - 4.3L 🢒 Exhaust Manifold Installation - Left Side

    Object Number: 328540 Size: SH
  1. Install the NEW exhaust manifold gaskets.

    2. Object Number: 859857 Size: SH
  2. Install the exhaust manifold.
  3. Install the spark plug wire shields.
  4. If reusing the fasteners, apply threadlock GM P/N 12345493 (Canadian P/N 10953488) or equivalent, to the threads of the exhaust manifold bolts and stud.

    5. Notice: Refer to Fastener Notice in the Preface section.

  5. Install the exhaust manifold bolts and stud.

    6. Tighten

    1. Tighten the exhaust manifold bolts and stud on the first pass to 15 N·m (11 lb ft).
    2. Tighten the exhaust manifold bolts and stud on the final pass to 30 N·m (22 lb ft).
  6. Install the spark plug wires to the spark plug wire retainers.
  7. Install the spark plug wires onto the spark plugs.