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Home >> Chevrolet >> 2003 >> Silverado 1500 HD, RWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> ENGINE CONTROLS - SELF-DIAGNOSTICS - 4.8L, 5.3L & 6.0L - Flex Fuel & Gasoline >> Diagnostic Tests >> DTC P1172: Secondary Fuel Pump Transfer Malfunction >> Conditions For Setting DTC

Conditions For Setting DTC

The PCM does not detect a change of 1.06 gal. (4 L) in both the primary and secondary fuel level sensors with the secondary pump commanded ON for 120 seconds.

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