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....
Forum Discussion
Thunderbolt wrote:
Stepper motors have were replaced last year. No issues with the truck at all and it does have 206,000 miles. I read about the O-ring, but it seems I have different symptoms. I may spend the 60.00 and replace the sending unit and see what happens.
Even repaired stepper motors can go bad. But, I agree, I'd put an ODBII reader on it and see what values are being reported.
One priceless thing I've found is an ELM327 ODBII Code Reader and then I installed the DashCommand App on my phone. This is really handy because any time there is a CEL you can check and clear codes but you can also look at PID's like oil pressure in live time and see what's really happening.
If the pressure is out of whack and the gauge is in-line with what the app says, then you could look at the sending unit. If a new sending unit doesn't change anything then you might look at the oil pump o-ring issue.
KJ
