'09 Sierra oil pressure gauge
I have a '09 Sierra 1500 crew 5.3 V8, and today I started experiencing oil pressure gauge problems. I have read a lot on here and other forums about something similar, but I haven't exactly found someone having the same problem yet.
I was driving and the oil pressure gauge shot to 0, check engine light came on. Truck drove normally besides this, no warning messages or beeps. I checked the oil when I parked--everything looked fine. I left about an hour later; this time, the gauge shot up to 80 max and stayed there with the check engine light on. It didn't fluctuate except for once when I braked, and it shot down to 0, but back up to 80 when I began moving again, where it has stayed since. Truck feels like it is driving completely normal.
Any idea? Of course the sensor itself, I've read a lot about the OP sending unit and the filter, but everyone seems to be getting a read of 0 and tons of warning messages where mine is acting a big differently.