For 1990-2009 cars

1. Apply sealer GM P/N 12346004, (Canadian P/N 10953480) or the equivalent to the oil pressure switch threads.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. Install the engine oil pressure switch.

Tighten
Tighten the engine oil pressure switch to 16 N·m (12 lb ft).

3. Apply sealer GM P/N 12346004, (Canadian P/N 10953480) or the equivalent to the knock sensor threads.
4. Install the knock sensor.

Tighten
Tighten the knock sensor to 19 N·m (14 lb ft).

5. Apply sealer GM P/N 12346004, (Canadian P/N 10953480) or the equivalent to the front oil gallery plug threads (1 and 2).
6. Install the front oil gallery plug (1).

Tighten
Tighten the oil gallery plug (1) to 19 N·m (14 lb ft).

7. Install the front oil gallery plug (2).

Tighten
Tighten the oil gallery plug (2) to 33 N·m (24 lb ft).

8. Apply sealer GM P/N 12346004, (Canadian P/N 10953480) or the equivalent to the rear oil gallery plug threads (1 and 4).
9. Install the rear oil gallery plugs (1 and 4).

Tighten
Tighten the oil gallery plugs (1 and 4) to 19 N·m (14 lb ft).

10. Install the rear oil gallery plugs (2 and 3).

Tighten
Tighten the oil gallery plugs (2 and 3) to 33 N·m (24 lb ft).

11. Apply sealer GM P/N United States 12346004, GM P/N Canada 10953480 or the equivalent to the engine block plugs.
12. Install the remaining engine block plugs.
13. Apply sealant GM P/N 12346004, (Canadian P/N 10953480) or the equivalent to the coolant drain plug threads.
14. Install the left coolant drain plug.

Tighten
Tighten the coolant drain plug to 19 N·m (14 lb ft).

15. Apply sealant GM P/N 12346004, (Canadian P/N 10953480) or the equivalent to the coolant drain plug threads.
16. Install the right coolant drain plug.

Tighten
Tighten the coolant drain plug to 19 N·m (14 lb ft).