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 MANUALSCHEVROLET2014EXPRESS 2500 BASE, VAN CARGO, 6.6L ENG VIN LREPAIR AND DIAGNOSISENGINE MECHANICALSTARTERBATTERY, CHARGING SYSTEM AND STARTING SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURES (BATTERY, CHARGING SYSTEM AND STARTING SYSTEM)CHARGING SYSTEM TEST (BATTERY, CHARGING SYSTEM AND STARTING SYSTEM)CIRCUIT/SYSTEM VERIFICATION (BATTERY, CHARGING SYSTEM AND STARTING SYSTEM)
2014 Chevrolet Express 2500 Base, Van Cargo, 6.6L Eng VIN L
Circuit/System Verification (Battery, Charging System And Starting System)
2014 Chevrolet Express 2500 Base, Van Cargo, 6.6L Eng VIN LSECTION Circuit/System Verification (Battery, Charging System And Starting System)
NOTE:
Do not have a battery charger connected during the generator testing.
- Ignition ON.
- Verify that no G13 Generator or B18 Battery Current Sensor DTCs are set that would cause a charging system concern.
- If DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If no DTCs are set
- If DTCs are set
- Verify the scan tool Body Control Module Battery Voltage parameter is 12 V or greater.
- If less than 12 V
Refer to Battery Inspection/Test .
- If 12 V or greater
- If less than 12 V
- Engine running, all accessories OFF.
- Verify the scan tool Body Control Module Battery Voltage parameter continually increases when controlling the Body Control Module Generator Regulator Setpoint from 10% to 80% with a scan tool. It may take up to 10 seconds for the battery voltage to stabilize between each setpoint change.
- If the battery voltage does not continually increase
Refer to Circuit/System Testing.
- If the battery voltage continually increases
- If the battery voltage does not continually increase
- All OK.
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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.