GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Tahoe - 4WD 🢒 Engine 🢒 Engine Mechanical - 6.5L 🢒 Turbocharger Installation

    Object Number: 59756 Size: SH
  1. Install the turbocharger on the exhaust manifold and the studs.

    2. 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.

  2. Install the nuts to the exhaust manifold.

    3. Tighten
    Tighten the exhaust manifold mounting nuts to 58 N·m (43 lb ft).


    Object Number: 59755 Size: SH
  3. Install the gasket on the oil return pipe.

    4. Object Number: 59754 Size: SH
  4. Install the oil return pipe to the bottom of the turbocharger.

    5. Tighten
    Tighten the oil return pipe bolts to 26 N·m (19 lb ft).

    Important: Fill the oil feed hole at the top of the turbocharger with a small amount of the engine oil while rotating the compressor wheel by hand. This action will lubricate the turbocharger shaft bearings.

  5. Install the oil feed hose at the turbocharger and the block.

    6. Tighten
    Tighten the oil feed hose fittings to 28 N·m (21 lb ft).


    Object Number: 59746 Size: SH
  6. Install the oil return pipe with the hose and the clamps at the block.

    7. Important: Apply the silicone sealant GM P/N 9985943 or the equivalent to the turbocharger outlet hose before installing onto turbocharger.

  7. Install the outlet hose and the clamp on the turbocharger.

    8. Tighten
    Tighten the connector hose clamps to 6 N·m (50 lb in).

  8. Install the long and the short turbocharger braces.

    9. Tighten

        • Tighten the long turbocharger brace nut to 34 N·m (26 lb ft).
        • Tighten the long turbocharger brace bolt to 50 N·m (37 lb ft).
        • Tighten the short turbocharger brace bolts to 25 N·m (19 lb ft).

    Object Number: 25616 Size: SH
  9. Install the grommet (4) in the valve rocker arm cover.
  10. Install the CDR (Crankcase Depression Regulator) assembly (1) in the valve rocker arm cover.