Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/3,000mi.Have underbody flushing service performed. See "Underbody Maintenance" inExterior Care.
Power Mode Description and Operation
GMLAN and Media Oriented Systems Transport (MOST) Wiring RepairsValve Stem Oil Seal and Valve Spring Replacement - Right Side Valvetrain Valve Actuating Assembly
Special ToolsEN-39313 -Spark Plug Port AdapterEN-46106 -Flywheel Holding ToolEN-46110 -On-Vehicle Valve Spring CompressorEN-46116 -Valve Stem Seal Remover/InstallerFor equivalent regional tools, refer toSpecial Tools.Removal ProcedureNote:This procedure is not used in Brazil.Remove the rocker arms. ...