Chevrolet Silverado / GMC Sierra. Manual — part 297

Fig. 217: View Of Crankshaft Key & Keyway
Courtesy of GENERAL MOTORS CORP.

7. Remove the crankshaft sprocket key, if required.

8. Clean and inspect the timing chain and sprockets. Refer to Camshaft Position Actuator

Cleaning and Inspection.

Installation Procedure

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 218: View Of Crankshaft Key & Keyway
Courtesy of GENERAL MOTORS CORP.

1. Install the key into the crankshaft keyway, if previously removed.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 219: View Of Crankshaft Sprocket Key Installation Position
Courtesy of GENERAL MOTORS CORP.

2. Tap the key (1) into the keyway until both ends of the key bottom onto the crankshaft.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 220: View Of Crankshaft Sprocket
Courtesy of GENERAL MOTORS CORP.

3. Install the crankshaft sprocket onto the front of the crankshaft. Align the crankshaft key with

the crankshaft sprocket keyway.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2