Caution: Proper operation of the 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 in a collision or deployment for conditions less severe than intended.
After any collision, inspect the following components as indicated. If you detect any damage, replace the component. If you detect any damage to the mounting points or mounting hardware, repair or replace the mounting points and mounting hardware as needed.
After a collision involving frontal air bag deployment, replace the following components. If you detect any damage to the mounting points or mounting hardware, repair or replace the mounting points and mounting hardware as needed.
Important: The front passenger seat is equipped with a PPS, which detects an occupant. If the requirements for disabling the I/P air bag are met then the PPS will communicate with the sensing and diagnostic module (SDM) to disable/turn OFF the I/P air bag, even in an accident. For more information on the PPS refer to SIR System Description and Operation .
After a collision involving frontal air bag deployment, perform the following inspections.
Perform these component inspections in addition to the inspections indicated above in Accident With or Without Air Bag Deployment. If you detect any damage, replace the component. If you detect any damage to the mounting points or mounting hardware, repair or replace the mounting points and mounting hardware as needed.
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 an SIR sensor mounted forward of the radiator, it must be replaced.
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 (DTC) table and a malfunctioning sensor is indicated, replace the sensor.
i didnt read anything in there about the sdm
You now need to take the truck to a GM dealer as they need to relearn the theft system and program the operational software into the new SDM using the GM Tech 2 scan tool and GM software. This is the only way to turn off the light and restore the SIR system to normal operating condition.
Inflatable Restraint Sensing and Diagnostic Module Replacement Removal Procedure
Caution: Refer to SIR Caution in the Preface section.
Caution: Do not strike or jolt the inflatable restraint sensing and diagnostic module (SDM). Before applying power to the SDM, make sure that it is securely fastened with the arrow facing toward the front of the vehicle. Failure to observe the correct installation procedure could cause SIR deployment, personal injury, or unnecessary SIR system repairs.
Important: The following repair procedures should only be used in the event that the inflatable restraint SDM mounting studs and/or fasteners are damaged to the extent that the SDM may no longer be properly mounted.
Notice: Refer to Fastener Notice in the Preface section.
Tighten Tighten fasteners to 10 N·m (89 lb in).
Important: The AIR BAG indicator may remain ON after the SDM has been replaced. DTC B1001 may set requiring the SDM part number to be set in multiple modules. If the indicator remains ON after enabling the SIR system, perform the diagnostic system check and follow the steps thoroughly to ensure that the SDM is set properly.
Important: Use the scan tool to perform the vehicle theft deterrent (VTD) relearn. Do not use the 30 minute manual learn procedure.