One of our 2005 Chevy C10 perimeter trucks with a 5.3 is stalling intermittently and the tach is inop at times under 1500rpm. Codes are P0300, P0171 and P0174. With the lean banks 1 and 2 we looked at the fuel psi it was in spec! Truck has 41000 miles and 1000... Login to read more.