Vehicle Roll Over Sensor
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
The vehicle roll over sensor is used to supplement the side Supplemental Inflatable Restraint (SIR) System. The sensing and diagnostic module (SDM) uses the input from the vehicle roll over sensor to assist in determining the severity of a vehicle roll over or near roll over condition. If the SDM determines a deployment is warranted, the SDM will cause current to flow through the deployment loops deploying the roof rail air bags.