And another clue it's not the sensor is that the I6 engine only has an ON/OFF switch at around 12 PSI to tell the PCM that there is oil pressure. The value sent to the gauge (again, for the I6 only) is a total fabrication by the PCM. Allows GM to same a dime using a cheaper sensor/switch, but since the average non-enthusiast owner doesn't know that, they need the gauge to wiggle a little bit proportional to RPM to reassure them it's still working. But when you know the truth, you lose all respect for the GM design management that ordered the engineers to lie like that.
emedlin said:
Oh yea, guy at Firestone said he had not seen gauges go bad in years and said he was sure it was the sending unit and wanted $190 to fix it. Glad I didn't let them try and fix it.
He knows NOTHING about the bad batch of GM steppers that's been failing for years. ADDED: That must be one of the crooked Firestone locations. A fair price for that is probably $75 max. Recommend never setting foot in there again.
See if you can find somebody with soldering experience, it's not trivial to do without watching somebody (even on a Youtube video) do it.