GM Service Manual Online
For 1990-2009 cars only

    Object Number: 290953  Size: SH

    Important: The number one cylinder intake and exhaust valves must be in the closed position.

  1. Align the timing mark on the front cover with the TDC mark on the balancer.

  2. Object Number: 43756  Size: SH
  3. Align the spot mark on the camshaft position sensor gear with the paint mark on the camshaft position sensor lower base.

  4. Object Number: 625961  Size: SH
  5. Remove the cover from the camshaft position sensor.
  6. Use a long flat blade screwdriver to rotate the oil pump driveshaft to engage the tang of the camshaft position sensor drive gear.
  7. With the camshaft position sensor in proper alignment, the reluctor wheel cutout should line up with the pointer on the camshaft position sensor housing.

  8. Object Number: 276382  Size: SH

    Important: The camshaft position sensor must be completely seated to allow proper engagement of the camshaft position sensor drive gear tang to the oil pump driveshaft. Repeat the installation procedure if the proper alignment is not obtained.

  9. Without holding the reluctor wheel, guide the camshaft position sensor into the hole in the intake manifold until the camshaft position sensor is seated. The reluctor wheel will turn clockwise as the camshaft position sensor is lowered into the engine.

  10. Object Number: 625962  Size: SH
  11. When properly installed, the reluctor wheel cutout should be in approximately the four o'clock position and should line up with the stamped number "9" on the camshaft position sensor housing.
  12. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

    Important: The camshaft position sensor hold down clamp must properly align with the mounting hole in the intake manifold. Repeat the installation procedure if the proper alignment is not obtained.

  13. Install the camshaft position sensor hold down clamp and bolt.
  14. Tighten
    Tighten the bolt to 33 N·m (24 lb ft).

  15. Install the camshaft position sensor cover and screws. Do not overtighten.
  16. Tighten
    Tighten the screws to 5 N·m (40 lb in).