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
2006 Chevrolet Suburban K2500, 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.
- Ignition OFF, remove the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement .
- Disconnect the harness connector of the steering wheel control switch assembly - left.
- Ignition ON, measure for 10 volts or greater between the 12-volt reference circuit terminal 1 and ground.
- If less than 10 volts, test the 12-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
- Ignition OFF, disconnect the harness connector X1 of the BCM.
- Ignition OFF, test for 1.0 ohm of resistance or less between the steering wheel control switch assembly - left terminal 3 and the BCM X1 terminal 3.
- If greater than the specified range, test the cruise control switch signal circuit for an open/high resistance.
- Ignition OFF, test for infinite resistance between the BCM X1 terminal 3 and ground.
- If less than the specified value, test the cruise control switch signal circuit for a short to ground.
- Ignition ON, test for 0 volts between the BCM X1 terminal 3 and ground.
- If greater than the specified value, test the cruise control switch signal circuit for a short to voltage.
- Test the component. If all circuits and the component tests are normal, replace the BCM.
RENDER: 1.0x
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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.