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 MANUALSGMC2011SAVANA SPECIAL 4.8 AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 175 (WIRING SYSTEMS AND POWER MANAGEMENT - DTC DIAGNOSTICS, TROUBLESHOOTING AND CONNECTOR REPAIR)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B1433CIRCUIT/SYSTEM DESCRIPTION
2011 GMC Savana Special 4.8 A
Circuit/System Description
2011 GMC Savana Special 4.8 ASECTION Circuit/System Description
WARNING: This page is about a different car, the 2011 GMC Savana and 2011 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
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.