GM Service Manual Online
For 1990-2009 cars only

The purpose of New Product Information is to highlight or indicate important new features for the service community.

Changes may include one or more of the following items:

    • Torque values and/or fastener tightening strategies
    • Engine specifications
    • New sealants and/or adhesives
    • Disassembly and assembly procedure revisions
    • Engine mechanical diagnostic procedure revisions
    • Special tools required

New Sealants and/or Adhesives

    • U.S. and Canadian SPO part numbers
    • 3-Bond sealant P/N 12378521

New Features on the LL8 Engine

    • Pan-axle design oil pan
    • Exhaust camshaft position actuator
    • Exhaust camshaft position actuator valve
    • Jack bolts on the front cover, rear cover, and oil pan

Engine Features

    • Powder metal connecting rods
    • Full floating piston pins
    • Lost foam casted aluminum block and head
    • Composite plastic camshaft cover
    • Electronic Throttle Control - ETC
    • Composite intake manifold
    • Bridge/bearing beam - stiffener ladder
    • Stainless steel fuel rail
    • Coil-on-plug ignition system
    • Inlet side thermostat
    • No EGR
    • No AIR

New Special Tools Required

No change from previous year.