Chevrolet Silverado / GMC Sierra. Service manual — part 341

Fig. 383: Identifying Plug Location On Underside Of Block
Courtesy of GENERAL MOTORS CORP.

2. Remove the engine block right rear coolant drain hole plug and seal.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 384: Locating Engine Block Left Front Oil Gallery Plug & Seal
Courtesy of GENERAL MOTORS CORP.

3. Remove the engine block left front oil gallery plug (116) and seal (117).

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 385: Locating Engine Block Left Rear Oil Gallery Plug & Seal
Courtesy of GENERAL MOTORS CORP.

4. Remove the engine block left rear oil gallery plug (112) and seal (113).

If the block plug and coolant heater sealing washers are not damaged, they may be used
during assembly.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 386: Identifying Engine Block Rear Oil Gallery Plug & Seal
Courtesy of GENERAL MOTORS CORP.

5. Remove the engine block rear oil gallery plug (111) and seal.

6. Inspect the O-ring seal of the rear oil gallery plug.

If the O-ring seal is not cut or damaged, the plug and O-ring seal may be used during
assembly.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2