GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 953998  Size: SH
  1. Remove the balance shaft chain tensioner. Refer to Balance Chain Tensioner Replacement .
  2. Remove the balance shaft drive chain from the following:
  3. 2.1. The crankshaft sprocket
    2.2. The left balance sprocket
    2.3. The right balance sprocket

Installation Procedure


    Object Number: 953998  Size: SH

    Important: Ensure the darkened links are facing outward.

  1. Install the balance shaft drive chain to the following:
  2. 1.1. The left balance sprocket
    1.2. The right balance sprocket
    1.3. The crankshaft sprocket

    Object Number: 1403675  Size: SH
  3. Verify the correct timing chain and timing mark alignments:
  4. • The left hand balance shaft sprocket timing mark (1) is at the 12:00 position
    • The right hand balance shaft sprocket timing mark (2) is at the 2:30 position
    • The crankshaft sprocket timing mark (3) is at the 4:30 position
    • The 3 timing marks (1-3) on the sprockets line up with a dark link on the chain
  5. Install the balance shaft chain tensioner. Refer to Balance Chain Tensioner Replacement .