GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1997 🢒 GMC Suburban - 2WD 🢒 Engine 🢒 Engine Mechanical - 6.5L 🢒 Camshaft Timing Chain and Sprocket Replacement

Removal Procedure

    Notice: Perform TDC Offset Recovery procedure if the timing chain, timing gears, engine front cover, crankshaft position sensor, crankshaft or other components affecting the timing are replaced.

  1. Remove the engine front cover. Refer to Engine Front Cover Replacement .

    2. Object Number: 60261 Size: SH
  2. Measure the timing chain free play in the following way:
    3. • Mount a dial indicator to the front of the block.
    • Position the dial indicator so that the plunger contacts the timing chain.
    • Pull the chain outward, parallel to the front face of the block, the maximum amount with finger pressure on the inside of the chain.
    • Set the dial indicator to zero.
    • Move the chain inward, parallel to the front face of the block, the maximum amount with finger pressure on the outside of the chain.
    • Note the total indicator travel. With used parts, the deflection must not exceed 20.3 mm (0.8 in). If the deflection exceeds this limit, the sprockets and the timing chain must be inspected for wear and replaced as necessary. With the new parts the deflection must not exceed 12.7 mm (0.5 in).

    Object Number: 59842 Size: SH
  3. Align the timing marks.

    4. Object Number: 60262 Size: SH
  4. Remove the camshaft sprocket with the timing chain.
  5. Remove the camshaft sprocket.

Installation Procedure

    Object Number: 60262 Size: SH
  1. Install the crankshaft sprocket.

    2. Important: Align the timing marks.

  2. Install the camshaft sprocket with the timing chain.

    3. Tighten
    Tighten the bolt to 171 N·m (125 lb ft).

    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.


    Object Number: 59842 Size: SH

    Important: Align the timing marks.

  3. Install the fuel injection pump gear and bolts.

    4. Tighten
    Tighten the bolt to 23 N·m (20 lb ft).

  4. Install the front cover for the fuel injection pump drive gear.
  5. Install the bolts to the front cover for the fuel injection pump drive gear.
  6. Adjust the fuel injection pump timing. Refer to Engine Controls.