GM Service Manual Online
For 1990-2009 cars only

Secondary Camshaft Drive Chain Installation - Left Side LLT or LCS

Special Tools

    • EN-48383 Camshaft Retaining Tools
    • EN-48589 Crankshaft Rotation Socket

    Object Number: 1978054  Size: SH

    Important: There should be no need to rotate the camshaft more than 10 degrees. Using the hex cast into the camshaft rotate the camshaft in order to install the EN-48383 .

  1. Install the EN 48383-1 onto the rear of the left camshafts.
  2. Important: All camshafts must be locked in place before installation of any camshaft drive chains.

  3. Ensure that the EN 48383-1 is fully seated onto the camshafts.

  4. Object Number: 1852307  Size: SH
  5. Ensure the crankshaft is in the stage one timing position with the crankshaft sprocket timing mark (1) aligned to the stage one timing mark on the oil pump cover (2) using the EN-48589 . Refer to Camshaft Timing Drive Chain Alignment Diagram.

  6. Object Number: 1852354  Size: SH
  7. Install the left secondary camshaft drive chain.

  8. Object Number: 1852356  Size: SH
  9. Place the left secondary camshaft drive chain around the inner sprocket of the left camshaft intermediate drive chain idler with the timing camshaft drive chain link (1) aligned to the alignment access hole (2) made in the left camshaft intermediate drive chain idler outer sprocket.

  10. Object Number: 1852357  Size: SH
  11. Wrap the secondary camshaft drive chain around both left actuator drive sprockets.
  12. Ensure there are 10 links (1) between the timing camshaft drive chain links for the camshaft position actuator sprockets.

  13. Object Number: 1852360  Size: SH
  14. Align the left exhaust camshaft position actuator sprocket alignment circle mark (2) with the timing camshaft drive chain link (1).

  15. Object Number: 1852362  Size: SH
  16. Align the left intake camshaft position actuator sprocket alignment circle mark (1) with the timing camshaft drive chain link (2).