Quote:
Originally Posted by not2oldchevy
I have the same engine 52 pounds is all the pressure that engine runs. You would have to change the fuel rail to get a fpr that will hold more pressure. That 2003 is made to run on 52 pounds.
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Unless its flex fuel, no. Return or returnless, they all ran the 58-62 rail pressure. Only the Flex fuel trucks (metal rail) ran the lower pressure. In 2003 you could get a plastic return rail, a metal flex fuel rail, or if it was a late-production run you could get the returnless plastic rail.