Chevrolet Silverado / GMC Sierra. Manual - part 484
Tighten: Tighten the nut to 100 N.m (74 lb ft).
6. Install the upper oil pan. Refer to Upper Oil Pan Replacement.
7. Install the engine front cover. Refer to Engine Front Cover Replacement.
CRANKSHAFT RELUCTOR AND OIL PUMP DRIVE GEAR REPLACEMENT
Removal Procedure
Fig. 242: View Of Oil Pump Driven Gear & Nut
Courtesy of GENERAL MOTORS CORP.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
1. Remove the engine front cover. Refer to Engine Front Cover Replacement.
2. While holding the secondary oil pump shaft with a hex driver, remove the oil pump driven
gear nut.
3. Remove the oil pump driven gear.
Fig. 243: View Of Oil Pump Drive Gear
Courtesy of GENERAL MOTORS CORP.
NOTE:
Do not use an impact driver to remove or install the oil pump
driven gear nut. Use of an impact driver may shear the oil pump
drive gear pin in the crankshaft.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
4. Remove the oil pump drive gear and crankshaft sensor reluctor. Do not damage the
crankshaft reluctor teeth.
Fig. 244: View Of Crankshaft Reluctor & Oil Pump Drive Gear Bolts
Courtesy of GENERAL MOTORS CORP.
5. Remove the crankshaft reluctor to oil pump drive gear bolts.
6. Inspect the crankshaft reluctor for the damage, bent teeth, being bent or warped.
7. Inspect the oil pump drive gear for damaged or worn teeth.
8. Inspect the oil pump drive gear crankshaft pin for wear.
9. Inspect the groove of the crankshaft pin in the oil pump drive gear for wear.
10. Replace any parts that are damaged or worn.
IMPORTANT: Do not remove the reluctor from the oil pump drive gear
unless replacing the reluctor or the oil pump drive gear. The
reluctor is timed to the gear and once removed the correct
timing will be lost.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Installation Procedure
Fig. 245: View Of Knock Pins Proper Installation Position In Oil Pump Drive Gear
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: The crankshaft reluctor and the oil pump drive gear are timed
at the factory. In order to re-establish proper timing, install
knock pins in the oil pump drive gear if the crankshaft
reluctor was removed from the oil pump drive gear. The
knock pins are available through the parts department.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado