Installation Procedure

WARNING: This page is about a different variant/trim than selected.

Fig 1: Identifying Crankshaft Sprocket Timing Mark

Courtesy of GENERAL MOTORS CORP.

Fig 2: View Of Crankshaft Sprocket

Courtesy of GENERAL MOTORS CORP.

Install the crankshaft sprocket on to the nose of the crankshaft.
Align the notch in the crankshaft sprocket with the pin in the crankshaft.
Slide the crankshaft sprocket on the crankshaft nose until the crankshaft sprocket contacts the step in the crankshaft.

Fig 3: View Of Stage One Timing Mark On Oil Pump Cover & Sprocket Timing Mark

Courtesy of GENERAL MOTORS CORP.

Ensure the crankshaft is in the stage one timing position with the crankshaft sprocket timing mark (1) aligned to the stage one timing mark on the oil pump cover (2) using the EN-48589 . See Special Tools . Refer to Camshaft Timing Drive Chain Alignment Diagram (Third Design) or Camshaft Timing Drive Chain Alignment Diagram (Fourth Design) - Stage One.