KAQ

I got my pump from gm. My initial thought is pump. Haven’t had any issues with it for 80k miles. When I get time I’ll slap one in. Needs a pan gasket anyhow.

Thanks for getting back. I’m in the same boat don’t drive it a lot but it’s frustrating. I might get 200 miles or 1500. When it does drop it is highway driving. I just continue home roughly 45 minutes. Putting around stays 40 highway 50-55. Was thinking relief valve in pump but you said you changed yours. My oil pump now was changed 80k miles ago. I’m just dealing with it as well. Gonna make something up at work to test actual pressures. Thing purrs like a kitten and runs out. Defnitly strange. I have 07nbs with 220k miles.

Hey did you figure this out. Mines doing the same thing driving me nuts