B0020 GMC - Passenger Instrument Panel Air Bag Deployment Loop Stage 2
B0020 GMC Possible Causes
- Faulty Passenger Frontal Module
- Passenger Frontal Module harness is open or shorted
- Passenger Frontal Module circuit poor electrical connection
- Faulty Sensing and Diagnostic Module (SDM)
First diagnose B0020 GMC code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
B0020 GMC Tech NotesDTC B0020 01: Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Short to Battery
DTC B0020 02: Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Short to Ground
DTC B0020 04: Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Open
DTC B0020 0D: Passenger Instrument Panel Air Bag Deployment Loop Stage 2 High Resistance
DTC B0020 0E: Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Low Resistance
Cost of diagnosing the B0020 GMC code
Labor: 1.0The cost of diagnosing the B0020 GMC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
B0020 GMC Possible Symptoms
- Air Bag Warning Light ON
B0020 GMC MeaningDuring a side or frontal crash of sufficient force the inflatable restraint Sensing and Diagnostic Module (SDM) will allow current to flow through the deployment loop in order to deploy an air bag or pretensioner. There are 2 shorting bars which will short together control circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the air bag or pretensioner during servicing.
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Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service
- Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
- Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
- Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
- Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.