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Home >> GMC >> 1994 >> C3500 HD 5.7 K, L05, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 5.7L >> Trouble Code Charts >> Code 44, Lean Exhaust Indication >> Fuel Contamination
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Fuel Contamination

Water, even small amounts, near in-tank fuel pump inlet can reach fuel injector, causing a lean exhaust and setting Code 44.