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.
Circuit/System Testing
2010 GMC Savana Special 4.8 ASECTION Circuit/System Testing
- Ignition ON, observe the DTC information with the scan tool.
- Verify that no other DTCS have set. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Ignition OFF, disconnect the yaw rate and lateral accelerometer sensor connector.
- Ignition OFF for 5 minutes, test for less than 1 ohm of resistance between the low reference circuit terminal 6 and ground.
- If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit test normal, replace the EBCM.
- Test the lateral accelerometer 12 volt reference circuit terminal 1 for a short to voltage or ground.
- If all circuits test normal, replace the yaw rate sensor and lateral accelerometer sensor, cycle the ignition switch and perform the yaw rate sensor reference table reset procedure.
- If the DTC sets again after replacing the yaw rate sensor and lateral accelerometer sensor, replace the EBCM.
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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.