
Remove the pressure relief plug-(1),spring-(2), and plunger-(3).

Remove the oil pump gerotor cover-(1) andbolts.Clean all of the parts in cleaning solvent. Remove varnish,sludge and dirt.Inspect the oil pump-(2, 3) for wear and scoring.Ensure that all components are within specifications. Refer toEngine Mechanical Specifications.
Replace the front cover-(4) and oil pump assemblyif it is out of specification or damaged.
Oil Pump Removal Engine Lubrication Oil Pump
Primary Camshaft Intermediate Drive Chain Removal Valvetrain Camshaft#10-00-89-005C: Warranty Administration - Revised Wiring Repair Labor Operations and Required Additional Information - (May 7, 2013)
Subject:Warranty Administration – Revised Wiring Repair Labor Operations and Required AdditionalInformationModels: 2014 and Prior GM Passenger Cars and Light Duty Trucks This bulletin is being revised to add the 2014 model year and labor codes. Pleasediscard Corporate Bulletin Number 10-00-89- ...