1. Remove the evaporator tube. Refer to Evaporator Tube Replacement in Heating, Ventilation and Air Conditioning.
2. Remove the secondary air injection (AIR) pump hose from the check valve.
3. Remove the AIR pipe bolts.
4. Remove the AIR pipe (with check valve) and gasket from the exhaust manifold.



5. Remove the spark plug wires from the ignition coils.

•	Twist the spark plug wire boot 1/2 turn.

•	Pull only on the boot in order to remove the wire from the ignition coil.




6. Remove the connector position assurance (CPA) clip (1).
7. Disconnect the ignition coil wire harness main electrical connector (4).



8. Remove the positive crankcase ventilation (PCV) valve pipe from the rocker cover.
9. Remove the PCV valve pipe strap nut, if necessary.
10. Remove the PCV valve pipe from the intake manifold, if necessary.



11. Remove the ignition coil bracket studs from the rocker arm cover.
12. Remove the ignition coil bracket from the rocker arm cover.



13. Remove the valve rocker arm cover bolts.
14. Remove the valve rocker arm cover.



15. Remove the gasket (1) from the rocker cover.
16. Discard the OLD gasket.



17. Remove the oil fill cap from the oil fill tube.
18. Remove the oil fill tube, if required.
19. Discard the oil fill tube.
20. Clean and inspect the valve rocker arm cover. Refer to Valve Rocker Arm Cover Cleaning and Inspection in Engine Mechanical - 5.7 L Unit Repair.

Important: 

1. Lubricate the O-ring seal of the NEW oil fill tube with clean engine oil.
2. Insert the NEW oil fill tube into the rocker arm cover.

Rotate the tube clockwise until locked in the proper position.

3. Install the oil fill cap into the tube.

Rotate the cap clockwise until locked in the proper position.




4. Install a NEW gasket (1) into the valve rocker lip.



5. Install the valve rocker arm cover onto the cylinder head.
6. Install NEW rocker arm cover bolt grommets, if necessary.

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.

7. Install the rocker arm cover bolts.

Tighten
Tighten the valve rocker arm cover bolts to 12 N·m (106 lb in).




8. Apply threadlock GM P/N 12345382,(Canadian P/N 10953489), or equivalent to the threads of the bracket studs.
9. Install the ignition coil bracket to the rocker arm cover.
10. Install the ignition coil bracket studs to the rocker arm cover.

Tighten
Tighten the ignition coil bracket studs to 12 N·m (106 lb in).




11. Install the PCV valve pipe to the intake manifold, if necessary.

Tighten
Tighten the PCV valve pipe strap nut to 12 N·m (106 lb in).

12. Install the PCV valve pipe to the rocker cover.



13. Connect the ignition coil wire harness main electrical connector (4).
14. Install the CPA clip (1).



15. Install the spark plug wires to the ignition coils.



16. Install a NEW AIR pipe gasket to the exhaust manifold.
17. Install the AIR pipe (with check valve) and bolts.

Tighten
Tighten the AIR pipe bolts to 20 N·m (15 lb ft).

18. Connect the AIR pump hose to the check valve.
19. Install the evaporator tube. Refer to Evaporator Tube Replacement in Heating, Ventilation and Air Conditioning.