GM Service Manual Online
For 1990-2009 cars only

Tools Required

EN 46105 Camshaft Locking Tool


    Object Number: 1306434  Size: SH
  1. Ensure that the crankshaft is in the stage two timing drive assembly position (1).

  2. Object Number: 946124  Size: SH
  3. Install the EN 46105-1 onto the rear of the right camshafts.

  4. Object Number: 902854  Size: SH
  5. Install the right secondary camshaft drive chain.

  6. Object Number: 1306435  Size: SH
  7. Place the secondary camshaft drive chain around the right camshaft intermediate drive chain idler outer sprocket, aligning the timing camshaft drive chain link (1) with the alignment access hole (2) made in the right camshaft intermediate drive chain idler inner sprocket.

  8. Object Number: 1306436  Size: SH
  9. Wrap the secondary camshaft drive chain around both right actuator drive sprockets.
  10. Ensure there are 7 links (1) between the timing camshaft drive chain links for the camshaft position actuator sprockets.

  11. Object Number: 1306439  Size: SH
  12. Align the right exhaust camshaft position actuator sprocket alignment triangle mark (1) with the timing camshaft drive chain link (2).

  13. Object Number: 1306442  Size: SH
  14. Align the right intake camshaft position actuator sprocket alignment triangle mark (2) with the timing camshaft drive chain link (1).

  15. Object Number: 1306444  Size: SH
  16. There will be 18 links (1) between the right camshaft intermediate drive chain idler timing camshaft drive chain link and each right camshaft position actuator sprocket timing camshaft drive chain link.