2008 Hummer H2 loss of oil pressure after warmed up
#11
Just on the one, sending unit on mine was bad, don't think that's your problem. Other forums point to the pump pressure relief valve, cam bearings, some even went with a newer sender and pigtail as in the last link above to the Pontiac G8 site.
#12
Fly, my 08 the oil reading is at 40 but sometimes fluctuates bet 20/25-40. I see that on all the 08's I've been in. Is it supposed to be steady at 40?
#14
This article has some good info on front-mounted GM pumps: Front-Mounted Oil Pumps: Good or Troublesome? - Engine Builder Magazine
#16
Not much experience with it but I'm thinking it's variable by design. It's a gerotor type so suspect that's got something to do with it. Lots of peeps on the forum with better info on this, I'm sure.
This article has some good info on front-mounted GM pumps: Front-Mounted Oil Pumps: Good or Troublesome? - Engine Builder Magazine
This article has some good info on front-mounted GM pumps: Front-Mounted Oil Pumps: Good or Troublesome? - Engine Builder Magazine
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