[Ski-me]

I put a Delphi in my 89' K5. It was a little sensitive to the electrical path though. PO did some type of splice at the electrical connector to the pump. I had to re-pin the connector to make a more "solid" connection and got rid of the soldered wire connection.

No issue since repair.

I "think" AC Delco was subbed out at some point and built to "GM" specs...but still 3rd party. Don't know if that changed at some point, but definitely there are questions about a genuine AC Delco and subbed out AC Delco.

I'd go with the Delphi one.

Dealer put in a new pump in my 04' Yukon many, many miles ago...still going strong at 165k. And by strong, I mean....it runs.