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 MANUALSCHEVROLET2013EXPRESS 2500 V8-4.8LREPAIR AND DIAGNOSISDIAGRAMSELECTRICAL DIAGRAMSBODY CONTROL SYSTEMS
2013 Chevrolet Express 2500 V8-4.8L
Body Control Systems
2013 Chevrolet Express 2500 V8-4.8LSECTION Body Control Systems
Body Control System Schematics
BCM Power, Ground and Serial Data
High Speed GMLAN (Gas)
High Speed GMLAN (Gas)
Gauges (L20, L96, LMF or LU3)
G103, G104, G105 and G106
BCM Inputs and Outputs (1 of 4)
Accessory Wakeup
BCM Inputs and Outputs (2 of 4)
Stop Lamp Controls and CHMSL
BCM Inputs and Outputs (3 of 4)
Compressor Controls (C60)
BCM Inputs and Outputs (4 of 4)
Charging System (Gas)
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.