Possible causes
– Sticking fuel rail pressure regulator
When is the code detected?
The actual fuel rail pressure is above operating specifications.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0088 GMC Description
Fuel Rail/System Pressure Too High is the generic definition for the P0088; however your vehicle’s manufacturer may have a different definition and information for the P0088 code.
GMC Technical Service Bulletins for P0088 code
2004 GMC T6500 ENGINE AND ENGINE COOLING:ENGINE:DIESEL
2004 GMC T8500 ENGINE AND ENGINE COOLING:ENGINE:DIESEL
2005 GMC T6500 ENGINE AND ENGINE COOLING:ENGINE:DIESEL
2005 GMC T8500 ENGINE AND ENGINE COOLING:ENGINE:DIESEL
2006 GMC T6500 ENGINE AND ENGINE COOLING:ENGINE:DIESEL
2006 GMC T8500 ENGINE AND ENGINE COOLING:ENGINE:DIESEL
2007 GMC T6500 ENGINE AND ENGINE COOLING:ENGINE:DIESEL
2007 GMC T8500 ENGINE AND ENGINE COOLING:ENGINE:DIESEL
2004 GMC C6500 ENGINE AND ENGINE COOLING:ENGINE:DIESEL
2005 GMC C6500 ENGINE AND ENGINE COOLING:ENGINE:DIESEL