For 1990-2009 cars

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.

1. Install the engine oil pressure switch. Apply sealer GM P/N 12346004 or equivalent to the oil pressure switch threads.

Tighten
Tighten the engine oil pressure switch to 13 N·m (115 lb in).

2. Install the camshaft position sensor.
3. Install the camshaft position sensor bolt.

Tighten
Tighten the camshaft position sensor bolt to 10 N·m (89 lb in).

4. Install the crankshaft position sensor into the side of the engine block.
5. Install the crankshaft position sensor stud. Apply threadlock GM P/N 12345382 or equivalent to the stud.

Tighten
Tighten the crankshaft position sensor stud to 11 N·m (98 lb in).

6. Install the crankshaft position sensor shield.
7. Install the crankshaft position sensor shield nut.

Tighten
Tighten the crankshaft position sensor shield nut to 10 N·m (89 lb in).

8. Install the knock sensor. Apply sealant GM P/N 12346004 or equivalent to the knock sensor threads.

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

9. Install the front 1/4 inch oil gallery plugs (1) and (2). Apply sealer GM P/N 12346004 or equivalent to the front oil gallery plugs.

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

10. Install the front 1/8 inch oil gallery plugs (1) and (2). Apply sealer GM P/N 12346004 or equivalent to the front oil gallery plugs.

Tighten
Tighten the 1/8 inch oil gallery plugs to 33 N·m (24 lb ft).

11. Install the 1/4 inch rear oil gallery plugs (1), (2), and (3). Apply sealer GM P/N 12346004 or equivalent to the rear oil gallery plugs.

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

12. Install the rear 1/8 inch oil gallery plugs (1), (2), and (3). Apply sealer GM P/N 12346004 or equivalent to the rear oil gallery plugs.

Tighten
Tighten the 1/8 inch oil gallery plugs to 33 N·m (24 lb ft).

13. Install the remaining engine block plugs. Apply sealer GM P/N 12346004 to the engine block plugs.
14. Install the left coolant drain plug. Apply sealant GM P/N 12346004 or equivalent to the coolant drain plug.

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

15. Install the right coolant drain plug. Apply sealant GM P/N 12346004 or equivalent to the coolant drain plug.

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