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Home >> Chevrolet >> 2009 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 6.6L LMM - Introduction >> Specifications >> Fuel System Specifications >> Fuel Specific Gravity Testing
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Fuel Specific Gravity Testing

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 temperature-adjusted value. This information must be accurate for the proper diagnosis of the fuel system.

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