It seems the failure rate on a lot of aftermarket parts is application specific - Airtex (as much as I would never use them) may have a decent pump for one application, but garbage for a bunch of others.
I don't want to sound like a broken record, and I totally understand unexpected financial difficulties at times, but given the time and effort involved in replacing a fuel pump, it pays to get the best you can and call it a day - especially if it's a family hauler.
The GM Original Equipment pump comes in two different packages - the bare pump with the strainer (15205632), or the pump with sending unit, float and the strainer (19207716). The pump is $183.79 on RockAuto, the pump with all the accessories is $232.79. The Delphi is only slightly cheaper at $159.79 and $211.89 respectively. Good luck!