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per my fuel gauge reading empty post- I have an update. I checked continuity with fuel level PPL wire and fuel level sensor grd reference ORN/BLK wire and both check out going back to ECU… good continuity on both .. any suggestions?

hi.. new to site. have an 02 silverado 1500.. fuel gauge was intermittently reading empty w/ low fuel message for a week or so- it has a 1/2 tank.... it has nowa new fuel pump/sender unit, pressure sensor, connectors, etc. pump works good.. wires on connector A (org/blk stripe signal) B (gray pump +12) C (purple +5) D (black grd.).. I'm getting +12V on pump, +5V on the purple wire, good ground... crazy- the fuel gauge is reading empty all the time... so to troubleshoot further i disconnected the 4 wire connector from sending unit which should drive the gauge to the full position but no go.. still empty. thinking it might be the gauge itself in cluster? does anyone have any ideas to throw at me that I can check? please and thank you.
 
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