GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 Canyon Pickup - 4WD 🢒 Engine 🢒 Engine Mechanical - 2.9L 🢒 Camshaft Timing Chain and Sprocket Replacement

Special Tools

    • J 44221 Camshaft Holding Tool
    • J 45059 Angle Meter

Removal Procedure

    Object Number: 954208 Size: SH
  1. Remove #1 cylinder spark plug. Refer to Spark Plug Replacement.
  2. Remove the camshaft cover. Refer to Camshaft Cover Replacement.
  3. Remove the camshaft position (CMP) sensor. Refer to Camshaft Position Sensor Replacement.
  4. Remove the engine front cover. Refer to Engine Front Cover Replacement.
  5. Rotate the crankshaft in the engine rotational direction clockwise, until the #1 piston is at top dead center (TDC) on the compression stroke.

    6. Warning: Refer to Camshaft Holding Tool Warning in the Preface section.

  6. Install the J 44221 to the rear of the camshafts.

    7. Object Number: 760721 Size: SH
  7. Release the tension on the timing chain by moving the tensioner shoe in.

    8. Object Number: 760718 Size: SH
  8. Place the tee into the tensioner to hold the shoe in place.

    9. Object Number: 1619812 Size: SH
  9. Remove and discard the exhaust camshaft position actuator bolt.
  10. Remove the exhaust camshaft position actuator.

    11. Object Number: 637575 Size: SH
  11. Remove and discard the intake camshaft sprocket bolt.
  12. Remove the intake camshaft sprocket.
  13. Remove the timing chain.
  14. Remove the crankshaft sprocket.

Installation Procedure

    Object Number: 637578 Size: SH

    Note: Ensure the #1 piston is at TDC. The pin on the crankshaft for the timing chain sprocket should be straight up.

  1. Install the crankshaft sprocket to the crankshaft snout.

    2. Note: Every 7th link of the timing chain is darkened to aid in aligning the timing marks.

  2. Install the intake camshaft sprocket into the timing chain.

    3. Aligning the dark link (1) of the timing chain with the timing mark on the intake camshaft sprocket.

  3. Feed the timing chain down through the opening in the cylinder head.
  4. Install the timing chain on the crankshaft sprocket.

    5. Aligning the dark link (2) of the timing chain with the timing mark on to the crankshaft sprocket.

    Note: Ensure the alignment pin is properly engaged with the camshaft

  5. Install the intake camshaft sprocket onto the intake camshaft.

    6. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 748325 Size: SH
  6. Install the new intake camshaft sprocket bolt and tighten to 20 N·m (15 lb ft) plus an additional 100 degrees using the J 45059 .
  7. Ensure the camshaft actuator is fully advanced prior to installation.

    8. Object Number: 1619822 Size: SH
  8. Install the exhaust camshaft actuator into the timing chain.

    9. Aligning the dark link (1) of the timing chain with the timing mark (1) on the exhaust camshaft position actuator sprocket.

    Note: 

       • To aid in aligning the actuator to the camshaft , use a 25 mm (1 in) wrench on the hex of the camshaft to rotate.
       • Ensure the alignment pin is properly engaged with the camshaft.

  9. Install the exhaust camshaft actuator onto the exhaust camshaft.

    10. Object Number: 1619812 Size: SH
  10. Install the new exhaust camshaft actuator bolt and tighten to 25 N·m (18 lb ft) plus an additional 135 degrees using the J 45059 .

    11. Object Number: 760718 Size: SH
  11. Remove the tee in the timing chain tensioner to regain tension on the timing chain.

    12. Object Number: 954208 Size: SH
  12. Remove the J 44221 from the camshafts.

    13. Object Number: 1619825 Size: SH
  13. The dark links (1) on the timing chain should be aligned with the marks on the sprockets as shown.
  14. Install the engine front cover. Refer to Engine Front Cover Replacement.
  15. Install the camshaft position (CMP) sensor. Refer to Camshaft Position Sensor Replacement.
  16. Install the camshaft cover. Refer to Camshaft Cover Replacement.
  17. Install #1 cylinder spark plug. Refer to Spark Plug Replacement.