C 2500 Truck 2WD V8-5.7L VIN R (1997)
Impact Sensor: Service and Repair
Sensor Replacement Guidelines
The SIR sensor replacement policy requires replacing sensors in the area of accident damage. The area of accident damage is defined as the portion of
the vehicle which is crushed, bent, or damaged due to a collision. For example, a moderate collision where the front of the vehicle impacts a tree. If the
vehicle has a SIR sensor mounted forward of the radiator, it must be replaced.
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Replace the sensor whether or not the air bags have deployed.
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Replace the sensor even if it appears to be undamaged.
Sensor damage which is not visible, such as slight bending of the mounting bracket or cuts in the wire insulation, can cause improper operation of the
SIR sensing system. Do not try to determine whether the sensor is undamaged, replace the sensor. Also, if you follow a diagnostic trouble code table and
a malfunctioning sensor is indicated, replace the sensor.
