B0020 GMC Possible Causes
- Faulty passenger front module
- Passenger front module wiring harness is open or short-circuited
- Poor electrical connection of the passenger front module circuit
- Faulty Sensing and Diagnostic Module (SDM)
How to Fix B0020 GMC Code?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Technical Notes
DTC B0020 01: Passenger Instrument Panel Inflatable Cushion Deployment Loop Stage 2 Short to Battery
DTC B0020 02: Passenger Instrument Panel Inflatable Cushion Deployment Loop Stage 2 Short to Ground
DTC B0020 04: Passenger Instrument Panel Inflatable Cushion Deployment Loop Stage 2 Open
DTC B0020 0D: Passenger Instrument Panel Inflatable Cushion Deployment Loop Stage 2 High Resistance
DTC B0020 0E: Passenger Instrument Panel Inflatable Cushion Deployment Loop Stage 2 Low Resistance
Possible Symptoms
- Airbag warning light illuminated
B0020 GMC Meaning
During a side or frontal collision of sufficient force, the Inflatable Restraint Sensing and Diagnostic Module (SDM) will allow current to flow through the deployment loop to deploy an airbag or pretensioner. There are 2 shorting bars that will short the control circuits together when the connector is disconnected. This helps prevent unwanted deployment of the airbag or pretensioner during maintenance.