Chevrolet Silverado / GMC Sierra. Manual — part 2109

Fig. 301: View Of Engine Block Front Oil Gallery Plug
Courtesy of GENERAL MOTORS CORP.

7. Remove the engine block front oil gallery plug (101).

IMPORTANT: Remove the front oil gallery plug, only if service is required.

If the front oil gallery plug is removed, a NEW oil gallery plug
must be installed.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 302: Left Side Knock Sensor & Bolt
Courtesy of GENERAL MOTORS CORP.

8. Remove the left side knock sensor (718) and bolt (739).

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 303: Right Side Knock Sensor & Bolt
Courtesy of GENERAL MOTORS CORP.

9. Remove the right side knock sensor (718) and bolt (739).

ENGINE BLOCK CLEANING AND INSPECTION

Tools Required

J 8087 Cylinder Bore Gage

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

J 42385-100 Head/Main Bolt Thread Repair Kit. See Special Tools .

Cleaning Procedure

Fig. 304: Main Bearing Caps
Courtesy of GENERAL MOTORS CORP.

NOTE:

Do not use a caustic solution to clean the aluminum engine block.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado