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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 >> Diagnostic Procedure

Diagnostic Procedure

Fig 1: DTC P1172: Fuel Transfer With Secondary Pump (Steps 1-9)
G00241417Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P1172: Secondary Fuel Pump Transfer Malfunction (Steps 10-20)
G00241418Courtesy of GENERAL MOTORS CORP.
Fig 3: DTC P1172: Secondary Fuel Pump Transfer Malfunction (Steps 21-32)
G00241419Courtesy of GENERAL MOTORS CORP.
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