I guess I should post an update. I ended up buying a Carter flex fuel capable fuel pump from Napa for about $250 and taking the non Flex Fuel Delphi pump back to OReilly. I looked at the screen on the OReilly computer when returning it and it very clearly showed their AirTex pump as the only...
The new pump came with a new pigtail to connect to the factory harness, so electrical wise, it'll be fine. And I'm assuming the plumbing of the fuel lines will be the same as well. This is the correct pump for this vehicle, just for the one with the T code engine, not the Z code.
I just...
I even called back to Oreillys, got a different guy and had him look up the fuel pump assembly from scratch. He even had me read the VIN # off to him. And their computer came back with the same part # again.
Something here stinks...
What is the difference in the fuel pumps between the "Z"...
I asked for a fuel pump assembly for a 2003 Tahoe, 4x4 with a 5.3 Flex Fuel "Z" code engine
He had an Airtex and a Delphi, I asked for the Delphi.
I did quite a bit of online shopping before deciding to buy it locally, and EVERY place I looked had different part numbers for the "T" code...
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