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 Valvetrain Valve Actuating Assembly
Special ToolsEN-36017Valve Guide Seal RemoverEN-43649Valve Spring CompressorEN-43649-10Valve Spring Compressor Adaptor SetEN-43653Flywheel Holding ToolFor equivalent regional tools refer toSpecial Tools.Removal ProcedureNote:Prevent the crankshaft from rotating clockwise orcounterclockwise before us ...