Removal ProcedureRemove the applicable camshaft(s). Refer toCamshaft Replacement - Left Side.

Remove the rocker arms.Clean and inspect the camshaft(s) and the rocker arm(s). Replace as necessary. RefertoCamshaft Cleaning and InspectionandValve Rocker Arm Cleaning and Inspection.Clean and inspect the valve lifters and replace as necessary. Refer toValve Lifter Cleaning and InspectionInstallation Procedure

Install the rocker arms. Refer toValve Rocker Arm Installation - Left Side.Install the camshaft(s). Refer toCamshaft Replacement - Left Side.
Direct Fuel Injector Replacement Fuel System Injectors
Valve Rocker Arm Replacement - Right Side Valvetrain Valve Actuating Assembly Rocker Arms#03-08-46-004N: Part Restriction and Ordering Process Information for OnStar Vehicle Communication Interface Modules (VCIM) (GMNA Only) - (Aug 30, 2013)
Subject:Part Restriction and Ordering Process Information for OnStar® Vehicle CommunicationInterface Modules (VCIM) (GMNA Only)Models: 2012-2014 GM Cars and TrucksAll Equipped with OnStar® RPO UE1 This bulletin has been revised to add the 2014 model year and update ESC contact information.Please ...