Oil pressure gauge
I have an 08 Silverado, I continue having trouble
with the oil filter causing the oil pressure gauge to
drop to zero pounds of pressure. At first, I replaced
the oil sending unit and the screen underneath the
unit. It didn't fix it. I checked the oil, obviously, it
was full. I finally changed the oil filter and it was an
automatic fix. However, about every two-three
months, my gauge will start to fall below 40 lbs of
pressure at idle and finally drop to zero and will
make the "stop engine immediately" light to come
on. The truck runs fine, no knocks or rattles and if I
unplug the oil pressure sensor, the truck runs fine, I
just don't have an oil pressure gauge and the check
engine light comes on. And now, the stabiltrak light
has started to flash off and on while driving and the
truck seems to act rough when I get in and out of
the gas. Anyone else having this much fun?
If this is the 5.3L I have heard of oil pressure problems with this motor, rare but do once in awhile hear of it. The solution has ben to replace the oil pump. On your next issue I suspect the wiring harness at the plugin for the Throttle Positioning Sensor, and the TPS itself. It is also referred to as Throttle Actuator Control Module also. There is a issue with the wires breaking inside the insulation at the plugin, and the TPS wiper arms start to separate. Where I bought my TPS the wiring harness plugin came with it. There should be some sort of code, anywhere from p1515 to p1519 when you scan the vehicle for codes.
Also on the oil pressure, it would be wise to check with an oil pressure gauge when it shows low oil pressure to verify that this is the problem. It is possible that the sensor or something else is faulty.
Any system or part failure that can cause a sudden engine die but actually catches itself without it cutting off will cause the gauge to fall and go back to normal even a bad engine misfire or periodical shorts.
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