GM Service Manual Online
For 1990-2009 cars only

The purpose of New Product Information is to highlight or indicate important changes from the previous model year.

Changes may include one or more of the following items:

    • Torque values and/or fastener tightening strategies
    • Changed engine specifications
    • New sealants and/or adhesives
    • Disassembly and assembly procedure revisions
    • Engine mechanical diagnostic procedure revisions
    • New special tools required
    • A component comparison from the previous year

Torque Values and/or Fastener Tightening Strategies

The engine mechanical fastener tightening specifications have changed for 2006.

    • The engine flywheel bolts diameter and torque have increased.
    • The oil pan bolt tightening procedure has been revised to a two pass sequence.
    • The crankshaft balancer bolt tightening procedure has had the torque angle increased.
    • Refer to Fastener Tightening Specifications .

Changed Engine Specifications

There are no changes to the engine specifications for 2006.

New Sealants and/or Adhesives

There are no sealant and adhesive changes for 2006.

Disassembly and Assembly Procedure Revisions

    • There are no disassembly procedure changes for 2006.
    • The tightening of the oil pan bolts has been revised to a two pass sequence.

Engine Mechanical Diagnostic Procedure Revisions

There are no revisions to the engine mechanical diagnostic procedures for 2006.

New Special Tools Required

There are new special tools required for 2006.

    • The crankshaft rear seal removal tool J 42841-A has been revised to fit both small or large engine flywheel bolt holes in the crankshaft.
    • The crankshaft rear seal installation tool J 45930-A has been revised to fit both small or large engine flywheel bolt holes in the crankshaft.
    • The valve retainer removing and installation tool J 43059 has been replaced by J-43059-A .
    • The piston pin clip remover and installation tool J 43654 has been replaced by EN-46745 .

A Component Comparison from the Previous Year

There are component changes for 2006.

    • The PCV hose now incorporates EVAP style connectors.
    • The ignition coils are revised.
    • The increase in engine flywheel bolt diameter affects the following components:
       - Engine flywheel bolts
       - Engine flywheel
       - Crankshaft