GM Service Manual Online
For 1990-2009 cars only

CAUTION:  Proper operation of the Supplemental Inflatable Restraint (SIR) sensing system requires that any repairs to the vehicle structure return the vehicle structure to the original production configuration. Not properly repairing the vehicle structure could cause non-deployment of the air bag(s) in a frontal collision or deployment of the air bag(s) for conditions less severe than intended.

After a collision, inspect the following components as indicated. If any damageis detected, replace the component. If damage to the mounting points or mounting hardware is detected, repair the component or replace the hardware as needed.

    • Steering column - Perform the steering column accident damage checking procedures. Refer to Steering Column Accident Damage Inspection - Off Vehicle in Steering Wheel and Column - Tilt.
    • IP Knee Bolsters and mounting points - Inspect the knee bolsters for bending, twisting, buckling, or any other type of damage.
    • IP brackets, braces, etc. - Inspect for bending, twisting, buckling, or any other type of damage.
    • Seat Belts - Perform the seat belt operational and functional checks. Refer to Operational and Functional Checks in Seat Belts.
    • Seats and Seat Mounting Points - Inspect for bending, twisting, buckling, or any other type of damage.

After inspecting the components listed above, proceed to the following Component Replacement and Inspections if inflator module deployment has occured.

Frontal Inflator Module Deployment

After a collision involving frontal inflator module deployment, replace the following components.

    • Inflatable restraint IP module
    • Inflatable restraint sensing and diagnostic module (SDM)
    • Inflatable restraint steering wheel module

Perform additional inspections on the following components.

    • Inflatable restraint steering wheel module coil and coil wiring pigtail - Inspect for melting, scorching, or other damage due to excessive heat.
    • Mounting points and mounting hardware for the inflatable restraint IP module, SDM, and steering wheel module - Inspect for any damage and repair or replace each component as needed.