Engine Block Plug Removal

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Block Coolant Heater

Courtesy of GENERAL MOTORS CORP.

Remove the engine block coolant heater (114) and seal (115).

Fig 2: Plug Location On Underside Of Block

Courtesy of GENERAL MOTORS CORP.

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

Fig 3: Engine Block Left Front Oil Gallery Plug

Courtesy of GENERAL MOTORS CORP.

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

Fig 4: Engine Block Left Rear Oil Gallery Plug

Courtesy of GENERAL MOTORS CORP.

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.

Fig 5: Engine Block Rear Oil Gallery Plug And Seal

Courtesy of GENERAL MOTORS CORP.

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

Fig 6: Front Oil Gallery Plug

Courtesy of GENERAL MOTORS CORP.

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.

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

Fig 7: Left Side Knock Sensor

Courtesy of GENERAL MOTORS CORP.

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

Fig 8: Right Side Knock Sensor

Courtesy of GENERAL MOTORS CORP.

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