Chevy Silverado 1500 airbags and seat belts by cab and year

What happens to your Silverado's module after a crash

On the Chevrolet Silverado 1500, the airbag computer is the SDM, the Sensing and Diagnostic Module. It is GM's name for the brain of the supplemental restraint system. The SDM reads the truck's impact sensors, decides in milliseconds whether to fire the airbags and seat belt pretensioners, and the moment it does, it writes a permanent crash record into its own memory.

That stored crash data is the reason your airbag light will not go off after an accident. The module sees its own deployment record, sets one or more hard codes, and locks. A standard OBD2 scanner cannot touch it, because the data sits at the module level, not in the diagnostic memory a scan tool can clear. Your Silverado will not pass the bulb check and the light burns steady.

We take your original Silverado SDM in our shop, clear the locked crash data and the hard codes, and return it reading factory-ready. It keeps its original GM calibration and your VIN, so it plugs straight back into your truck and works on the first key cycle. You reinstall the same module GM built for that Silverado.