Engine Block Plug Removal

WARNING: This page is about a different car, the 2003 GMC Envoy XL and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required

J 41712 Oil Pressure Switch Socket

IMPORTANT: Do not remove the engine block front oil gallery plug unless service is required.

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

Remove the oil pressure sensor, if not previously removed, using the J 41712 or equivalent.

Fig 1: Removing Oil Pressure Sensor
Courtesy of GENERAL MOTORS CORP.
Remove the engine block right rear coolant plug.

Fig 2: Removing Engine Block Right Rear Coolant Plug
Courtesy of GENERAL MOTORS CORP.
Remove the engine block coolant heater, if applicable.

Fig 3: Removing Engine Block Coolant Heater
Courtesy of GENERAL MOTORS CORP.
Remove the engine block left rear coolant plug, if applicable.

Fig 4: Removing Engine Block Left Rear Coolant Plug
Courtesy of GENERAL MOTORS CORP.
Remove the engine block left front oil gallery plug.

Fig 5: Removing Engine Block Left Front Oil Gallery Plug
Courtesy of GENERAL MOTORS CORP.
Remove the engine block left rear oil gallery plug.
Inspect the block plug sealing washers.
If the block plug and heater sealing washers are not damaged, they may be used during assembly.

Fig 6: Removing Engine Block Left Rear Oil Gallery Plug
Courtesy of GENERAL MOTORS CORP.
Remove the engine block rear oil gallery plug.
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 7: Removing Engine Block Rear 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.

Fig 8: Removing Engine Block Front Oil Gallery Plug
Courtesy of GENERAL MOTORS CORP.