GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Tools Required

    • J 42069-1 Camshaft Locking Tool
    • J 42069-2 Camshaft Locking Tool
  1. Disconnect the negative battery cable.
  2. Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  3. Remove the intake air resonator Refer to Intake Air Resonator Replacement in Engine Controls.
  4. Remove the front timing belt cover. Refer to Timing Belt Cover Replacement .
  5. Remove the timing belt. Refer to Timing Belt Replacement .
  6. As a precaution, rotate the crankshaft counterclockwise to the 60 degrees BTDC position to prevent valve/piston contact.

  7. Object Number: 158966  Size: SH
  8. Insert the J 42069-1 and the J 42069-2 Camshaft Gear Locking Tools into the appropriate camshaft gears to hold the gears in place while removing the bolt.
  9. Remove the camshaft gear bolt.
  10. Remove the camshaft gear.

Installation Procedure

Tool Required

J 36660-A Torque/Angle Meter

Important: Install the numbered camshaft gear slots on the correct camshaft alignment pins, so that the reference marks (1, 2, 3 and 4) are aligned with the notches on the rear timing belt cover.


    Object Number: 159005  Size: SH
  1. Install the camshaft gear.

  2. Object Number: 159009  Size: SH

    Important: Use a new camshaft gear bolt. The required tightening method will stretch the bolt, therefore the bolt is not reusable.

  3. Install the camshaft gear bolt.
  4. Tighten

        • Use the relevant J 42069-1 and/or the J 42069-2 Camshaft Gear Locking Tools to hold the camshaft gear and the camshaft in place while tightening the camshaft gear bolt.
        • Use the J 36660-A to tighten the camshaft gear bolt to 50 N·m (37 lb ft) + 60 degrees + 15 degrees.
  5. Turn the crankshaft clockwise back to TDC.
  6. Install the timing belt. Refer to Timing Belt Replacement .
  7. Adjust the timing belt. Refer to Timing Belt Timing Adjustment .
  8. Install the front timing belt cover. Refer to Timing Belt Cover Replacement .
  9. Install the intake air resonator Refer to Intake Air Resonator Replacement in Engine Controls.
  10. Reconnect the negative battery cable.
  11. Reprogram the applicable accessories.