Chevrolet Silverado / GMC Sierra. Service manual — part 694

Fig. 75: Routing The Deployment Harness Out Of The Vehicle's Passenger Side
Courtesy of GENERAL MOTORS CORP.

61. Route the deployment harness out of the passenger side of the vehicle.

62. Completely cover the windshield and the front door window openings with a drop cloth.

63. Stretch to the full length all of the deployment harness wires on the right side of the vehicle.

64. Deploy each deployment loop one at a time.

65. Place a power source, 12 V minimum/2 A minimum, such as a vehicle battery, near the

shorted end of the harnesses.

66. Separate one set of wires and touch the wire ends to the power source in order to deploy the

selected inflator module.

67. Disconnect the deployment harness from the power source and twist the wire ends together.

68. Continue the same process with the remaining deployment harnesses.

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 76: Routing The Deployment Harness Out Of The Vehicle's Driver Side
Courtesy of GENERAL MOTORS CORP.

69. Stretch to the full length all of the deployment harness wires on the left side of the vehicle.

70. Deploy each deployment loop one at a time.

71. Place a power source, 12 V minimum/2 A minimum, such as a vehicle battery, near the

shorted end of the harnesses.

72. Separate one set of wires and touch the wires ends to the power source in order to deploy

the selected inflator modules.

73. Disconnect the deployment harness from the power source and twist the wire ends together.

74. Continue the same process with the remaining deployment harnesses.

75. Remove the drop cloth from the vehicle.

76. Disconnect all harnesses from the vehicle.

77. Discard the harnesses.

78. Scrap the vehicle in the same manner as a non-SIR equipped vehicle.

79. If one or all of the inflator modules did not deploy, perform the following steps to remove

the undeployed modules from the vehicle:

Inflatable Restraint Steering Wheel Module Replacement

Inflatable Restraint Instrument Panel Module Replacement

Inflatable Restraint Roof Side Rail Module Replacement (Crew Cab) or
Inflatable Restraint Roof Side Rail Module Replacement (Extended Cab) or
Inflatable Restraint Roof Side Rail Module Replacement (Regular Cab)

2008 Chevrolet Silverado 1500

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

Silverado

PRETENSIONER HANDLING AND SCRAPPING

Scrapping Procedure

During the course of a vehicles useful life, certain situations may arise which will require the
disposal of a live and undeployed seat belt pretensioner. Do not dispose of a live and undeployed
seat belt pretensioner through normal disposal channels until the seat belt pretensioner has been
deployed. The following information covers the proper procedures for disposing of a live and
undeployed seat belt pretensioner. Do not deploy the seat belt pretensioner in the following
situations:

After replacement of a seat belt pretensioner under warranty. The seat belt pretensioner may
need to be returned undeployed to the manufacturer.

If the vehicle is the subject of a Product Liability report, GM1241, related to the SIR
system or the seat belt system. If the vehicle is subject to the Product Liability report, do not
alter the SIR or seat belt system in any manner.

If the vehicle is involved in a campaign affecting the seat belt pretensioners. Follow the
instructions in the Campaign Service Bulletin for proper SIR handling procedures.

Deployment Procedures

The seat belt pretensioner can be deployed inside or outside of the vehicle. The method used
depends upon the final disposition of the vehicle. Review the following procedures in order to
determine which will work best in a given situation.

CAUTION: When carrying an undeployed inflatable restraint seat belt

pretensioner:

Do not carry the seat belt pretensioner by the wires or
connector.

Carry the seat belt pretensioner by the piston tube,
keeping hands and fingers away from the cable.

Make sure the open end of the seat belt pretensioner
piston tube points away from you and other people.

Do not cover the seat belt pretensioner piston tube
opening with your hand.

Failure to observe these guidelines may result in personal
injury.

2008 Chevrolet Silverado 1500

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

Silverado

Deployment Outside Vehicle for Seat Belt Pretensioners

Deploy the seat belt pretensioners outside of the vehicle when the vehicle will be returned to
service. Situations that require deployment outside of the vehicle include the following:

Using the SIR diagnostics, it is determined that the seat belt pretensioner is malfunctioning.

The seat belt pretensioner pigtail, if equipped, is damaged.

The seat belt pretensioner connector is damaged.

The seat belt pretensioner connector terminals are damaged.

Deployment and disposal of a malfunctioning seat belt pretensioner is subject to any required
retention period.

Tools Required

J 39401-B SIR Deployment Fixture

J 38826 SIR Deployment Harness

An appropriate pigtail adaptor

CAUTION: In order to prevent accidental deployment and the risk of

personal injury, do not dispose of an undeployed inflatable
restraint seat belt pretensioner as normal shop waste.
Undeployed seat belt pretensioners contain substances that
could cause severe illness or personal injury if their sealed
containers are damaged during disposal. Use the following
deployment procedures to safely dispose of an undeployed
seat belt pretensioner. Failure to observe the following
disposal methods may be a violation of federal, state, or local
laws.

2008 Chevrolet Silverado 1500

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

Silverado