Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 988 (SUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B0090CIRCUIT/SYSTEM TESTING
2006 Chevrolet Suburban C2500, 6.0 U
Circuit/System Testing
2006 Chevrolet Suburban C2500, 6.0 USECTION Circuit/System Testing
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.
- The vehicle rollover sensor
- The SDM module
- The vehicle rollover sensor harness connector
- The SDM wiring harness connector
- For DTC B0090 39 replace the vehicle rollover sensor.
- For DTC B0090 0F, B0090 3A and B0090 71 request DTC from ROS and repair any ROS DTC prior to continuing this diagnostic procedure.
- With Ignition OFF, disconnect the vehicle rollover sensor connector. Refer to inflatable restraint vehicle rollover sensor replacement in repair instructions for connector location.
- Remove the SDM connector.
- Test the vehicle rollover sensor serial data circuit for an open or high resistance between the vehicle rollover sensor and SDM connector. Verify no open or high resistance exists.
- If any of the above conditions are found make the appropriate repair.
- Test the vehicle rollover sensor ignition 1 voltage circuit for a short to ground, a high resistance, or an open. Verify no short to ground, a high resistance, or an open exists.
- If any of the above conditions are found make the appropriate repair.
- Replace the inflatable restraint vehicle rollover sensor. Perform the Inflatable Restraint Vehicle Rollover Sensor Programming and Setup procedure.
- Ignition ON, use the scan tool to clear the DTCs, then recheck for DTC B0090. Verify that the DTC does not reset.
- If DTC B0090 was current replace the SDM.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.