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Old 10-10-2009, 06:34 PM   #1
Quick69
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Low oil pressure in a new Chevy truck

A friend of mine bought a 2009 2500 series silverado and the oil pressure reads low. I'm pretty sure its a 6.0L and he was wondering if this is common. He also wondered if there is a spring that can be swapped out in the oil pump to increase pressure.
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Old 10-10-2009, 06:35 PM   #2
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Alot of the new ones read 15-20 psi at idle, but should come up under power.
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Old 10-10-2009, 06:42 PM   #3
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it builds with rpm, just thought 15-20lbs was low
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Old 10-10-2009, 07:03 PM   #4
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Warranty!!
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Old 10-10-2009, 07:43 PM   #5
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That seems a little low for a new engine, my 02 still has over 40psi at hot idle with 195k miles.
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Old 10-10-2009, 08:11 PM   #6
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Although that is plenty at idle there is a bulliten out for these RPO Codes L76, L92, L9H, LC9, LH6, LH8, LS2, LS3, LS4, LS7 for low oil pressure. These are the aluminum blocks.
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Old 10-10-2009, 08:14 PM   #7
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That seems a little low for a new engine, my 02 still has over 40psi at hot idle with 195k miles.
Same here. My '00 has 115k and has never dipped below 40 psi.
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Old 10-10-2009, 09:09 PM   #8
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Ive put a few oil pumps in these, along with motors due to pump failures. The pumps are a real PITA, gotta pull front diff, oil pan and front cover. Id rather put a motor in one then a pump.
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Old 10-10-2009, 09:15 PM   #9
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Ive put a few oil pumps in these, along with motors due to pump failures. The pumps are a real PITA, gotta pull front diff, oil pan and front cover. Id rather put a motor in one then a pump.
Why not pull the engine out then change it?
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Old 10-10-2009, 09:28 PM   #10
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Why not pull the engine out then change it?

6 of one, half a dozen of the other, know what I mean?
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Old 10-10-2009, 09:32 PM   #11
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PIP4158B: Low Oil Pump Pressure Due To Seized Oil Pressure Relief Valve - (Dec 1, 2008)

Subject:Low Oil Pump Pressure due to Seized Oil Pressure Relief Valve

Models:2008-2009 Buick Lacrosse, Allure (Canada Only)
2007-2009 Cadillac Escalade
2007-2009 Chevrolet Avalanche, Silverado, Suburban, Tahoe, Trailblazer
2007-2008 Chevrolet Monte Carlo SS
2007-2009 Corvette, Impala SS
2009 Chevrolet Colorado
2007-2009 GMC Envoy, Sierra, Yukon
2009 GMC Canyon
2008-2009 Hummer H2
2008-2009 H3 Alpha
2008-2009 Pontiac Grand Prix GXP
2008-2009 Pontiac G8 GT
2007-2009 Saab 97x
with Aluminum Gen IV V8 Engine Block
(RPO Codes L76, L92, L9H, LC9, LH6, LH8, LS2, LS3, LS4, LS7)


This PI was superseded to update models and to clarify that the PI is referring to the oil pressure relief valve in the oil pump. Please discard PIP4158A.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
<A href="http://gsi.xw.gm.com/si/showDoc.do?docSyskey=2214865&from=sm#ss1-2214865">Condition/Concern:

Some customers may complain of low oil pressure, no oil pressure, and/or engine noise. This may be the result of a sticking oil pump pressure relief valve. In some instances, the customer may experience this intermittently if the valve frees up when the engine cools down.
<A href="http://gsi.xw.gm.com/si/showDoc.do?docSyskey=2214865&from=sm#ss2-2214865">Recommendation/Instructions:

If the SI diagnosis isolates low mechanical oil pressure, replace the oil pump, flush the oil cooler lines (if equipped), clean the inside of the oil pan, change the oil and filter, and re-evaluate the concern.
Notice: If an engine noise is noticed after replacing the oil pump, follow the SI diagnosis and repair the engine as necessary.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
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Old 10-10-2009, 09:55 PM   #12
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6 of one, half a dozen of the other, know what I mean?
I know what you mean, it's gonna be a pain to change either way.
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Old 10-10-2009, 09:56 PM   #13
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Ive put a few oil pumps in these, along with motors due to pump failures. The pumps are a real PITA, gotta pull front diff, oil pan and front cover. Id rather put a motor in one then a pump.

I put a timing chain and gears in mine and I didnt have to pull the diff or oil pan, just real careful when I pulled the strainer tube out.
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Old 10-10-2009, 10:11 PM   #14
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low oil pressure

I have a 99 z71 with 102k and a tahoe with 25k they both keep about 40psi. I looked at a new chev this week in durham. Glad I didn't buy one. Sounds like member silver91hatch hit it on the head. (WARRANTY TIME)
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Old 10-11-2009, 01:42 AM   #15
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not to jack the thread but it wouldnt happen if it had a oval around it, jk ha lol
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Old 10-11-2009, 06:52 AM   #16
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2500 is not an aluminum block though so there should not be a problem with it. my truck reads 20 at idle and 40-50 under load
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Old 10-11-2009, 07:52 AM   #17
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we drove a 2500 back from seattle with the oil pressure low. come to find out it was a bad sensor
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Old 10-11-2009, 12:06 PM   #18
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I put a timing chain and gears in mine and I didnt have to pull the diff or oil pan, just real careful when I pulled the strainer tube out.

I dont see how its possible to get the pickup bolts out of the pump? Unless the older ones are different? Ive studied it pretty hard to try to shortcut it but couldnt see getting the lower of the two pickup bolt out of the pump.
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Old 10-11-2009, 01:56 PM   #19
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I dont see how its possible to get the pickup bolts out of the pump? Unless the older ones are different? Ive studied it pretty hard to try to shortcut it but couldnt see getting the lower of the two pickup bolt out of the pump.
I only loosened the bolts a little to let it drop and used a flex head ratchet wrench to get to the bolt.
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