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 MANUALSCHEVROLET2010CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTIGNITION SWITCH/STEERING LOCKWIRING SYSTEMS AND POWER MANAGEMENT - DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC INFORMATION AND PROCEDURESDTC B1433CIRCUIT/SYSTEM DESCRIPTION
2010 Chevrolet Chevy Express G3500, Van Passenger Extended
Circuit/System Description
2010 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Circuit/System Description
The body control module (BCM) controls the RUN relay through the run relay coil control circuit by applying voltage to the coil side of the relay. The RUN relay is energized when any of the following conditions are true:
- Ignition Switch is in ACC or RUN.
- The vehicle was remote started.
- The vehicle is in retained accessory power (RAP) mode.
RENDER: 1.0x
NO RELATED
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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.