The last few times I've started my truck, it takes a few seconds to build pressure. Maybe its a gauge, but when it runs around 1800-2000rpm the psi is around 65....probably 25psi at idle...this is when the truck is warm. I just replaced the oil too.

Anyone else have any ideas about my oil psi? One time the check oil pressure light flashed, but it immediately built pressure....im clueless

could be the oil is draining out of the filter ?

Mine is pretty close to what you have, but haven't noticed the lag initially?

Sound normal except for the check oil pressure light.

x2 on the oil filter. What brand are you using?

could be the junk GM cluster

could be the junk GM cluster

That or even a sending unit getting weak.

When I cold start my truck its at 78psi

what brand and part # oil filter, check engine application, think 6.5 filter will fit but does not have valve to hold oil in filter.

x2, buy the delco filter and see how it does.

Mine did this in the winter when it was -20* out and my truck had 15w-40 in it. It would take about 5sec to build any pressure, and the light came on quite a few times. It scared me so I changed it out asap and put in 5w-40 and it only took about 1 second build pressure. Its normal now. Same psi as your reading.

x2 on the oil filter. What brand are you using?

I think its the Fram ToughGaurd. I'd have to get under the truck and check. Maybe those are junk?

Mine did this in the winter when it was -20* out and my truck had 15w-40 in it. It would take about 5sec to build any pressure, and the light came on quite a few times. It scared me so I changed it out asap and put in 5w-40 and it only took about 1 second build pressure. Its normal now. Same psi as your reading.

I always run 15w-40 in my Duramax, am I supposed to be running 5w-40?