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I know this has been asked a bunch but I can’t find what I’m looking for, so anyway, I have an 03 Tahoe 5.3. started getting a message on the display for Low oil pressure and the guage drops to 0. This happens when I’m sitting still but only occasionally. I can drive it for days and nothing happens, then randomly at a red light the pressure drops to 0. However when I hook my ODB2 code reader up to the computer there is nothing there for low oil pressure. No codes. Is this normal? I’ve read a bunch of posts about the o rings and sending units, which I have already replaced the sending unit and it did not fix the problem. I have had some problems with the instrument cluster.
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