Removal ProcedureRemove the engine front cover. Refer toEngine Front Cover Replacement.

Remove the primary camshaft drive chain tensioner. Refer toPrimary Camshaft Intermediate Drive Chain Tensioner Replacement.Remove the primary upper camshaft drive chain guide. Refer toPrimary Timing Chain Guide Removal - Upper.Installation Procedure

Install the primary upper camshaft drive chain guide. Refer toPrimary Timing Chain Guide Installation - Upper.Install the primary camshaft drive chain tensioner. Refer toPrimary Camshaft Intermediate Drive Chain Tensioner Installation.Install the engine front cover. Refer toEngine Front Cover Replacement.
Secondary Timing Chain Tensioner Shoe Replacement - Left Side Valvetrain Valvetrain Timing Timing Belt Tensioner
Secondary Camshaft Intermediate Drive Chain Tensioner Replacement - Right Side Valvetrain Camshaft#04-06-04-047L: TOP TIER Detergent Gasoline (Deposits, Fuel Economy, No Start, Power, Performance, Stall Concerns) – U.S. Only - (Nov 7, 2013)
Subject:TOP TIER Detergent Gasoline (Deposits, Fuel Economy, No Start, Power, Performance,Stall Concerns) – U.S. OnlyModels: 2014 and Prior GM Cars and Trucks (U.S. Only) This bulletin has been revised to add the 2014 model year. Please discard CorporateBulletin Number 04-06-04-047K. In Canada ...