GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2008 🢒 LaCrosse 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Ignition Coil Replacement - Bank 1

Removal Procedure
  1. Turn the ignition OFF.
  2. Remove the engine cover. Refer to Fuel Injector Sight Shield Replacement .

    3. Important: Do NOT disconnect the fuel pipes and/or hoses.

  3. If you are replacing the ignition coil for cylinder 5, remove and reposition the intake manifold. Perform the following steps.
    4. 3.1. Disconnect the air cleaner duct from the throttle body.
    3.2. Disconnect the positive crankcase ventilation (PCV) hose from the right bank camshaft cover.

            Important: Do NOT separate the upper intake manifold from the lower intake manifold.

    3.3. Remove the intake manifold bolts.

    Object Number: 1306504 Size: SH
    3.4. Remove the intake manifold brace bolts (1 and 2) and the brace.
    3.5. Remove the upper intake manifold. Refer to Upper Intake Manifold Replacement .

    Object Number: 887888 Size: SH
  4. Remove the ignition coil electrical connectors.

    5. Object Number: 860797 Size: SH
  5. Remove the ignition coil bolts.
  6. Remove the ignition coils.

Installation Procedure

    Object Number: 860797 Size: SH
  1. Install the ignition coils.

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

  2. Install the ignition coil bolts.

    3. Tighten
    Tighten the ignition coil bolts to 10 N·m (89 lb in).


    Object Number: 887888 Size: SH
  3. Install the ignition coil electrical connectors.
  4. If necessary, install the intake manifold. Refer to Upper Intake Manifold Replacement .
  5. Install the engine cover. Refer to Fuel Injector Sight Shield Replacement .