GM Service Manual Online
For 1990-2009 cars only

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

Changes may include 1 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

No torque or fastener tightening changes from the previous year. Refer to Fastener Tightening Specifications .

Changed Engine Specifications

No changed engine specifications. Refer to Engine Mechanical Specifications .

New Sealants and/or Adhesives

No sealant or adhesive changes from the previous year. Refer to Adhesives, Fluids, Lubricants, and Sealers .

Engine Mechanical Diagnostic Procedure Revisions

All diagnosis on a vehicle should follow a logical process. Strategy based diagnostics is a uniform approach for repairing all systems. The diagnostic flow may always be used in order to resolve a system condition. The diagnostic flow is the place to start when repairs are necessary. For a detailed explanation, refer to Strategy Based Diagnosis or Diagnostic Starting Point - Engine Mechanical .

New Special Tools Required

    • A variety of new tools have been developed to assist in engine disassembly, assembly, and on-vehicle service. Refer to Special Tools .
    • Angle meter J 45059 has been developed to provide technicians with a convenient method to tighten bolts that require the torque angle tightening strategy.

A Component Comparison from the Previous Year

    • The exhaust gas recirculation system (EGR) has been removed. Refer to Disassembled Views .
    • The front cover is now aligned to the engine block with 2 front cover locating pins.
    • All applications use a full-floating design piston and pin assembly.