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Home >> Buick >> 2008 >> Allure CXL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Control System & Fuel System - 5.3L - Troubleshooting & Diagnosis) >> Alcohol/Contaminants-in-Fuel Diagnosis >> System Verification

System Verification

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The fuel sample should be drawn from the bottom of the tank so that any water present in the tank will be detected. The sample should be bright and clear.