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 MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 193 (GENERATORS & REGULATORS)TROUBLE SHOOTINGGENERATOR WARNING LIGHT OPERATION
2006 Chevrolet Suburban C2500, 6.0 U
Generator Warning Light Operation
2006 Chevrolet Suburban C2500, 6.0 USECTION Generator Warning Light Operation
WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
- Verify that the battery is fully charged.
- Verify that the drive belt deflection/tension is correct.
- With the ignition switch at ON, verify the generator warning light illuminates. If it does not illuminate, inspect the generator warning light and the wiring harness. If the generator warning light and the wiring harness are normal, inspect the PCM.
- Verify that the generator warning light goes off after the engine is started. If it does not go out, check if any one of the following DTCs in the on-board diagnostic system are displayed:
- P0112, P0113, P2502, P2503 or P2504.
If P0112, P0113, P2502, P2503 or P2504 is displayed, perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
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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.