IdentificationAccessory and warranty replacement must use TPC spectires.An outboard orientation stripe is added to the tread surface,with an offset toward the outboard tire face.All GM approved tires (Production, Service and Accessory)have a TPC (Tire Performance Criteria) code.A replacement tire that lacks the original TPC code will notmeet the performance characteristics of the original tire, even ifit is the same brand, model and size.Force and MomentResidual Aligning Torque (RAT)Rolling ResistanceBraking TractionDriving TractionUniformityNoiseDimensionsMassRev/KMHigh SpeedAir RetentionElectrical ResistanceAutomatic MountingEndurance (ATE)TreadwearChip/tearGroove WanderRide and HandlingWet/Snow Handling
The TPC system facilitates tire replacement for GM customerson GM vehicle, meeting the same critical performance specificationsof GM vehicle original equipment tires.
Valve Stem Oil Seal and Valve Spring Replacement - Left 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. Refe ...