Air Injection: Service and Repair

The content of this article/image reflects the changes identified in TSB

Bulletin No.: 06-06-04-017

Date: March 30, 2006

SERVICE MANUAL UPDATE

Subject:
Revised Secondary Air Injection Pipe Replacement Procedure

Models:
2004-2006 Buick Rainier
2004-2006 Chevrolet TrailBlazer
2004-2006 GMC Envoy

with 4.2L Inline Six Cylinder Engine (VIN S - RPO LL8)

Secondary Air Injection Pipe Replacement (2006 Model Year Vehicles)

Removal Procedure

1. Raise the vehicle.





2. Disconnect both the air inlet and air outlet pipe from the secondary air injection reaction (AIR) pump.

3. Remove the air inlet and air outlet pipe retaining clip from the fuel rail.

4. Lower the vehicle.

Important:
It is not necessary to remove the throttle body to remove the intake manifold.

5. Remove the intake manifold.

6. Remove the number 6 ignition coil.






7. Disconnect the AIR hose from the air box.





8. Disconnect the AIR hose from the solenoid valve.





9. Disconnect the engine coolant temperature (ECT) sensor electrical connector.





10. Remove the bolt and fir-tree fasteners securing the AIR pipe to the cylinder head.





11. Remove the AIR hose assembly by rotating over the top of the engine.



Installation Procedure





1. Install the AIR hose assembly by rotating over the top of the engine.

2. Add a drop of P/N 12345382 (Canadian P/N 10953489) to the bolt threads.

Note:
Refer to Fastener Notice in Cautions and Notices.

3. Install the bolt and fir-tree fasteners securing the AIR pipe to the cylinder head. Tighten the bolt until fully seated.





4. Connect the AIR hose to the air box.





5. Connect the AIR hose to the solenoid valve.





6. Connect the ECT sensor electrical connector.

7. Install the intake manifold.

8. Install the number 6 ignition coil.

9. Raise the vehicle.





10. Connect the air inlet and air outlet pipe retaining clip to the fuel rail.

11. Connect both the air inlet and air outlet pipe to the AIR pump.

12. Lower the vehicle