After way too muchvtriuble, I have this solved. I
Here is the solution. I just go lucky on stumbling onto it These cars are so hard to source parts for. I landed on the OEM type Delphi pump through Parts Geek. I did a lot of testing on it, and not sure if I caused first pump fail or if was...
96 Tahoe 5.7L. Been down quite a while. Ran weak on fuel pressure, liked to die at stoplights any time I was below 1/4 tank. Then it just ceased starting after I reached my parking place. I did no diagnostics. Found a correct pump, Delphi. After changing this twice, getting high 20s on...
I had a issue that seemed to be the passcode sensor, so ordered new housing with the sensor and changed out the column parts. Also put in a new ignition switch ( the electronic wire harness component that does the actual work, not the key and cylinder).
All is installed, and same symtoms...
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