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Home >> GMC >> 2005 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Controls - 6.6L (Introduction)) >> Specifications >> Fuel System Specifications >> Fuel Specific Gravity Testing

Fuel Specific Gravity Testing

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Use a J 38641-B  Diesel Fuel Quality Tester to measure the fuel specific gravity (API Rating). See Special Tools . Follow the instructions on the tool to obtain the proper temerpature-adjusted value. This information must be accurate for the proper diagnosis of the fuel system.

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