DTC B1015 Passenger Deploy. Loop Resistance High  
DTC B1016 Passenger Deployment Loop Resistance Low  
DTC B1017 Passenger Deployment Loop Open  
DTC B1018 Passenger Deployment Loop Short to GND  
DTC B1019 Passenger Deploy. Loop Short to Voltage  
DTC B1021 Driver Deployment Loop Resistance High  
DTC B1022 Driver Deployment Loop Resistance Low  
DTC B1024 Driver Deployment Loop Short to Ground  
DTC B1025 Driver Deployment Loop Short to Voltage  
DTC B1026 Driver Deployment Loop Open  
DTC B1051 Deployment Commanded  
DTC B1053 Deployment Commanded w/Loop Malfunction  
DTC B1061 Lamp Circuit Failure  
DTC B1071 Internal SDM Failure
AIRBAG (SIR) CODES
 The supplemental inflatable restraint (SIR) system supplements the protection offered by the occupant seat
belt system. The SIR system has several inflator modules located throughout the vehicle, i.e. the inflatable
restraint steering wheel module, inflatable restraint IP module in passenger side of dash, and the inflatable
restraint side impact module - LF and RT.
 Each inflator module has a deployment loop that is controlled by the inflatable restraint Sensing and
Diagnostic Module (SDM), which is mounted inside of the vehicle. The SDM determines the severity of a
collision with the assistance of various sensor inputs. When the SDM detects a collision of sufficient force, it
will process the information provided by the sensors to further support inflator module deployment. The SDM
performs continuous diagnostic monitoring of the SIR system electrical components. Upon detection of a
circuit malfunction, the SDM will set a diagnostic trouble code (DTC) and inform the driver by commanding
the instrument panel cluster (IPC) to turn the AIR BAG indicator ON.
 The steering column and knee bolsters are designed to absorb energy and compress during frontal
collisions in order to limit leg movement and decrease the chance of injury to the driver and front passenger.
GM dash warning lights
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