Chevy & GMC Vans

Looking at RockAuto for my '03 AWD.

AC D0elco for the two options, the first is w/o the robust fuel system sender (part# 19180052)

Same as above but with robust fuel sys sender. (Part# 15036173, 88965569)

Which one do I use?

Ken

Ken-last pump I put on the LT I found out through Delco tech it doesn't have the O.E.M. pressure spec and they said it doesn't matter because it has the volume spec.This was after the job was done and I was kind of disappointed.But Delphi still sells the replacement pump with both spec's.