No oil pressure at start up, 2001 Tahoe

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2006Tahoe2WD

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My 04 Z71 has 245k. These trucks last if you take care of them. I have had zero oil pressure issues since I put the O ring in. hope this thread eventually helps someone avoid a very expensive "rebuilt" just because a $3 oring goes bad.
Again, good write up. I'm watching my oil pressure and it is now 32psi at cold start and rev it up without change. So I think I have the O-ring issue.
 

2006Tahoe2WD

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Again, good write up. I'm watching my oil pressure and it is now 32psi at cold start and rev it up without change. So I think I have the O-ring issue.
I think the issue is verified. The mechanic overfilled the oil about 2/3 quart? The pressure went up from 26 to 32 cold start. I read somewhere about testing the O-ring by overfilling and cold starting with the rear end up in the air. Yesterday (with the overfilled oil) I coldish started on a steep downhill driveway and the pressure went right to 40-45. I think this confirms that I have a pick-up tube O-ring that is not good.
 

nonickatall

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So swap it, it's not a big deal. I did it myself. When you do it swap as well the pressure relief valve which also can make trouble and is accessible when the oil pan is down.
 

2006Tahoe2WD

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