Originally Posted by OkDually
Verify you have 12v. electrical power going to the lift pump.
I would remove the FFM, clean it and then blow some compressed air through the water in fuel drain line, with the T valve open, to clear any possible blockage.
If you replace the tank sock, only use AC/Delco #TS 1012
Thanks, I do indeed have 12v, measured this before.
Will do these steps next. Truck is in lockup until Februari so can't do a testdrive unfortunately.