P0093 GMC Fuel System Leak Detected Large Leak

Possible causes

– Faulty fuel pump
– Blocked fuel filter
– Faulty fuel pressure solenoid
– Faulty Fuel injector

Tech description

There is a factory service bulletin for the P0093 Code

2001-2004 GMC Sierra
2003-2004 GMC Topkick C4500/C5500 Series
GMC Factor Service Bulletin OBDII Code P0093 or P1093

2001-2004 GMC Sierra
2003-2004 GMC Topkick C4500/C5500 Series
GMC Factor Service Bulletin OBDII Code P0087, P0093, P1093

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P0093 GMC OBD Code Description