GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 TrailBlazer - 4WD 🢒 Engine 🢒 Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L 🢒 Cylinder Head Installation - Left Side

Special Tools

    • J 42385-100 Head/Main Bolt Thread Repair Kit
    • J 45059 Angle Meter

For equivalent regional tools, refer to Special Tools

    Warning: Refer to Safety Glasses Warning in the Preface section.


    Object Number: 1402032 Size: SH

    Caution: Clean all dirt, debris, and coolant from the engine block cylinder head bolt holes. Failure to remove all foreign material may result in damaged threads, improperly tightened fasteners or damage to components.

    Note: 

       • Do not use the cylinder head bolts again. Install NEW cylinder head bolts during assembly.
       • Do not use any type of sealant on the cylinder head gasket, unless specified.

  1. Clean the engine block cylinder head bolt holes, if required.

    2. Thread repair tool J 42385-107 may be used to clean the threads of old threadlocking material.

  2. Spray cleaner GM P/N 12346139 (Canadian P/N 10953463), GM P/N 12377981 (Canadian P/N 10953463), or equivalent, into the hole.
  3. Clean the cylinder head bolt holes with compressed air.
  4. Install the cylinder head locating pins (230).

    5. Object Number: 63235 Size: SH
  5. Inspect the locating pins for proper installation.

    6. Object Number: 1548586 Size: SH
  6. Inspect the displacement markings on the gasket for proper usage.

    7. Object Number: 1402032 Size: SH
  7. Install the NEW cylinder head gasket (217) onto the locating pins.

    8. Object Number: 1402030 Size: SH
  8. Install the cylinder head (218) onto the locating pins and the gasket.
  9. Install the NEW cylinder head bolts (220, 221).

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


    Object Number: 260150 Size: SH
  10. Tighten the cylinder head bolts.
    11. 10.1. Tighten the M11 cylinder head bolts (1-10) a first pass in sequence to 30 N·m (22 lb ft).
    10.2. Tighten the M11 cylinder head bolts (1-10) a second pass in sequence to 90  degrees using the J 45059 meter .
    10.3. Tighten the M11 cylinder head bolts (1-10) a final pass in sequence to 70 degrees using the J 45059 meter .
    10.4. Tighten the M8 cylinder head bolts (11-15) to 30 N·m (22 lb ft). Begin with the center bolt (11) and alternating side-to-side, work outward tightening all of the bolts.