texaSS364 Posted September 22, 2015 Report Share Posted September 22, 2015 Need some help on this one, hopefully you guys have the answer to this. Over the past week I've had this problem 3 times where I've started my truck and the oil pressure is at 0. I've noticed at pattern in the three times its done this, they have all been on hot starts. When I cold start in the morning or after work everything is fine. But if I'm driving, stop for a minute, and get back in the pressure is at zero. All three times I have shut the truck off and restarted it a couple of times and the pressure will very slowly build back up to around 25-30 lbs which is lower than normal. I've ruled out the stepper motor because I've replaced that before and have noticed differences (goes back to 0 when I shut it off, truck is chiming at me). I'm hoping this is just the sending unit, what do you guys think? Quote Link to comment Share on other sites More sharing options...
silverado777 Posted September 22, 2015 Report Share Posted September 22, 2015 Only thing you can do is either hook up a mechanical gauge and see if the reading is correct or just replace the sending unit. Quote Link to comment Share on other sites More sharing options...
1BAD2K Posted September 22, 2015 Report Share Posted September 22, 2015 ^^^ I would do that to rule it out. If that doesn't fix it, I would swap the filter and go ahead and do an oil change....if that doesnt, I would be looking at the oil pump and get one of the updated o-rings. When I swapped the LS6 into my truck I couldn't get any oil psi bc of one of those old style not sealing up. Quote Link to comment Share on other sites More sharing options...
WantaSSS Posted September 23, 2015 Report Share Posted September 23, 2015 replace oil sender. If thats not it, most likely the o- ring on the pickup tube. they crack and cause suction loss to the pump. Quote Link to comment Share on other sites More sharing options...
texaSS364 Posted September 23, 2015 Author Report Share Posted September 23, 2015 Thanks for the help guys, I'll replace the sender this weekend and update after that. Quote Link to comment Share on other sites More sharing options...
EXGM Posted September 23, 2015 Report Share Posted September 23, 2015 Throwing parts at it sounds like a good idea.... it could also be your cluster. Your best bet is to get a gauge and test it. Quote Link to comment Share on other sites More sharing options...
texaSS364 Posted September 30, 2015 Author Report Share Posted September 30, 2015 So I finally replaced the sender, it seems to have been the problem. I will update the thread if it does it again. Quote Link to comment Share on other sites More sharing options...
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