GM Service Manual Online
For 1990-2009 cars only

The purpose of New Product Information is to highlight or indicate important product 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 torque angle specification has changed for the cylinder head bolts. Refer to Fastener Tightening Specifications , Cylinder Head Installation - Left Side and Cylinder Head Installation - Right Side .

The redesigned lower primary camshaft drive chain guide is retained to the block with shouldered bolts.

Changed Engine Specifications

The engine specifications for engine unit repair have not changed for 2001.

New Sealants and/or Adhesives

The sealants and adhesives for engine unit repair have not changed for 2001.

Disassembly and Assembly Procedure Revisions

The redesigned lower primary camshaft drive chain guide is retained to the block with shouldered bolts.

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 problem. The diagnostic flow is the place to start when repairs are necessary. For a detailed explanation, refer to Strategy Based Diagnosis in General Information or Diagnostic Starting Point - Engine Mechanical in Engine Mechanical.

New Special Tools Required

No new special tools are required.

A Component Comparison from the Previous Year

The lower primary camshaft drive chain guide has changed from a composite construction to all plastic construction utilizing shouldered bolts to retain the lower primary camshaft drive chain guide to the block.