What is going on with my truck!?
Asked by Ryan Aug 14, 2023 at 05:09 PM about the 2013 GMC Sierra 1500 SLT Crew Cab 4WD
Question type: Maintenance & Repair
My oil psi at idle is at roughly 18psi when fully
warmed up and at 60 mph or about 1500 rpm it is
only at roughly 30 psi and at 70mph or roughly
1700rpm it is at around 36 psi what is going on and
the motor only has 70k miles on it
3 Answers
You may have a restriction in the oil pressure gauge screen, take the screen out if it has crud in it. If there is crud in it then the engine has not been maintained properly. I would hook up a manual oil pressure gauge just to verify actual oil pressure. It’s too soon for excessive bearing clearance problems, but if it hasn’t been maintained then it is possible. Now GM’s of this design are know for oil pumps going out, so good luck.
Oil pressure sensors are a common problem with these trucks. There is a screen under the sensor that gets plugged. I made an adapter that goes where the oil cooler lines bolts onto the oil pan to check oil pressure.
