Chevrolet Silverado / GMC Sierra. Service manual — part 676

Fig. 16: Identifying SIR Coil, Steering Shaft Assembly & Retaining Ring
Courtesy of GENERAL MOTORS CORP.

3. Slide the inflatable restraint steering wheel module coil (4) onto the steering shaft (2).

4. Firmly seat the new inflatable restraint steering wheel module coil retaining ring (3) into the

appropriate groove on the steering shaft (2).

5. Remove and discard the centering tab from the new inflatable restraint steering wheel

module coil (4).

6. Connect any electrical connectors as needed.

7. Install the steering column shroud. Refer to Steering Column Shroud Replacement .

2008 Chevrolet Silverado 1500

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

Silverado

8. Install the steering wheel. Refer to Steering Wheel Replacement .

9. Remove anti-rotation pin J 42640 .

INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL CENTERING

Fig. 17: View Of Block Tooth Of Steering Shaft Assembly In 12 O'clock Position
Courtesy of GENERAL MOTORS CORP.

NOTE:

The new SIR coil assembly will be centered. Improper
alignment of the SIR coil assembly may damage the unit,
causing an inflatable restraint malfunction.

2008 Chevrolet Silverado 1500

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

Silverado

1. Verify the following conditions before centering the SIR coil:

The wheels on the vehicle are straight ahead.

The block tooth (1) of the steering shaft assembly is in the 12 o'clock position.

The ignition switch is in the LOCK position.

IMPORTANT: If double wire harness strap is installed onto the wire

harness assembly and column, you must reuse the holder for
the wire straps during installation.
Remove the wire harness strap(s) where necessary.

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 18: View Of Coil Hub Centering Window & Arrows
Courtesy of GENERAL MOTORS CORP.

2. The front of the SIR coil has a centering window (1). To center the SIR coil perform the

following steps:

1. Hold the SIR coil with the face up.

2008 Chevrolet Silverado 1500

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

Silverado