Water Pump
Includes Water Pump Drive Sprocket; Before removing the Water Pump it is recommended to install GM Tool # J43651 or equivalent to keep the Timing Chain and Gears properly synchronized
Water Pump
See Vehicle Manufacturer Recommendation for Replacement of Timing Components; Before Removing The It Is Recommended To Install GM Tool # J43651 Or Equivalent To Keep The Timing Chain And Gears Properly Synchronized; Includes Back Housing