Oil Pump Drive Chain and Sprocket Removal

Special Tools 

EN-51142  Oil Pump Sprocket Unit Holding Tool

For equivalent regional tools, refer to Special Tools .

Fig 1: Oil Pump Sprocket Bolt And Sprocket Holding Tool
Courtesy of GENERAL MOTORS COMPANY
1. Loosen the oil pump sprocket bolt (2), by counterhold with the EN-51142  holding tool (1).
Fig 2: Oil Pump Sprocket, Bolt, Shaft, Drive Chain And Drive Chain Sprocket
Courtesy of GENERAL MOTORS COMPANY
2. Remove and DISCARD the oil pump sprocket bolt (4).
3. Remove the oil pump sprocket (3) from the oil pump shaft (5).
4. Remove the oil pump drive chain (2) from the oil pump drive chain sprocket (1).