Chevrolet Silverado / GMC Sierra. Service manual — part 684

4. Securely tighten all fasteners that hold the I/P module (1) to the deployment fixture

(2).

Fig. 33: Identifying Fasteners Holding Side Impact Module To Deployment Fixture
Courtesy of GENERAL MOTORS CORP.

10. When deploying a roof rail module, perform the following instructions:

1. Place the J 39401-B (3) in the center of the cleared area.

2. Fill the deployment fixture with water or sand to provide sufficient stabilization of

fixture during deployment.

2008 Chevrolet Silverado 1500

2008 RESTRAINTS Supplemental Inflatable Restraints - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

3. Adjust and secure the fixture arms (4) to the deployment fixture (3), using the proper

nuts and bolts.

4. Attach the roof rail module in the deployment fixture and securely tighten all fasteners.

Fig. 34: Identifying SIR Deployment Harness & Adapter
Courtesy of GENERAL MOTORS CORP.

11. Inspect the SIR deployment harness and the appropriate pigtail adapter (2) for damage.

Replace as needed.

12. Short the 2 SIR deployment harness leads (1) together using one banana plug seated into the

other.

13. Connect the appropriate pigtail adapter (2) to the SIR deployment harness (1).

2008 Chevrolet Silverado 1500

2008 RESTRAINTS Supplemental Inflatable Restraints - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 35: Extending SIR Deployment Harness & Adapter
Courtesy of GENERAL MOTORS CORP.

14. Extend the SIR deployment harness and adapter to the full length from the deployment

fixture or area.

IMPORTANT: On a dual stage inflator module, both connectors must be

attached to the deployment harness adapter. This will ensure
that both stage 1 and stage 2 of the deployment loops are
energized, regardless of the deployment state.

2008 Chevrolet Silverado 1500

2008 RESTRAINTS Supplemental Inflatable Restraints - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 36: Inflator Module & SIR Deployment Harness Adapter
Courtesy of GENERAL MOTORS CORP.

15. Connect the inflator module (1) to the adapter (2) on the SIR deployment harness (3).

16. Clear the area of people.

IMPORTANT:

The rapid expansion of gas involved with deploying an
inflator module is very loud. Notify all the people in the
immediate area that you intend to deploy the inflator
module.

When the inflator module deploys, the deployment
fixture may jump about 30 cm (1 ft) vertically. This is a
normal reaction of the inflator module due to the force of
the rapid expansion of gas inside the inflator module.

If you are deploying a dual stage inflator module with
stage 1 already deployed, the fixture may not move and
the noise may have been reduced.

2008 Chevrolet Silverado 1500

2008 RESTRAINTS Supplemental Inflatable Restraints - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado