Got four faulty pumps in a row
2014 GMC 2500, replaced the factory fuel pump with a Delphi in December 2022, customer complained of hard starting shortly after, losing fuel pressure after shutdown; warranty pump went in in February 2023, same issue shortly after, another pump in April, then another in June. Now in early August that one has the same symptoms. Either the check valve has gone bad or there's an internal leak in the fuel pump assembly. It has a good warranty, but after four faulty pumps in a row, we're switching to a GM pump.