03 Silverado oil pressure
My Chevy 2500HD 6.0 liter has developed a problem. My oil pressure has always been 40 psi at idle and 50-55 psi on the freeway.
Yesterday it started idling at 30-35 psi and 50-55 psi on the freeway.I know it is within specs, but why did it change overnight ? The other thing I noticed is that the gauge responds slower than it used to and on the freeway it can be erratic at times. It will jump back and forth between 50 and 55 psi and sometimes it does the same thing between 30 and 35 psi at idle. The instrument cluster has the updated stepper motors as well, but I am wondering if the sending unit could cause this or if it is something mechanical. Why would it happen overnight ? I also changed the oil and filter with a new AC Delco filter and Mobil One 5w30 oil. Any input would be appreciated.
Yesterday it started idling at 30-35 psi and 50-55 psi on the freeway.I know it is within specs, but why did it change overnight ? The other thing I noticed is that the gauge responds slower than it used to and on the freeway it can be erratic at times. It will jump back and forth between 50 and 55 psi and sometimes it does the same thing between 30 and 35 psi at idle. The instrument cluster has the updated stepper motors as well, but I am wondering if the sending unit could cause this or if it is something mechanical. Why would it happen overnight ? I also changed the oil and filter with a new AC Delco filter and Mobil One 5w30 oil. Any input would be appreciated.
