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Home >> Hummer >> 2009 >> H2 V8-6.2L >> Repair and Diagnosis >> Starting and Charging >> Battery >> Service Precautions

Battery: Service Precautions

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Battery Disconnect Warning

Warning

Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.