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OB Mechanics - 2007 Silverado
Posted on 5/26/15 at 11:30 am
Posted on 5/26/15 at 11:30 am
I've got 50k miles on an 07 silverado, this morning I got a low pressure warning and said to kill engine. Checked it and no leaks, oil levels are good and I changed the oil less than 4000 miles ago, running synthetic. Is it just the sensor or could it be something bigger? Thanks for any input!
TL;DR low oil pressure, no leaks, oil is full.
TL;DR low oil pressure, no leaks, oil is full.
2
Posted on 5/26/15 at 11:31 am to lsuguy124
it's the valve body under the intake that controls the cylinder deactivation lifters. They all do it
Posted on 5/26/15 at 11:33 am to meauxjeaux2
Can't you completely get rid of that?
Posted on 5/26/15 at 11:35 am to meauxjeaux2
Thanks I appreciate the help!
Posted on 5/26/15 at 11:36 am to Hammertime
My brother had the same year truck and issue. The oil pressure sensor went out on him. I heard it was a common issue. located around the headers i believe. cheapish fix/ easy fix if thats the issue
Posted on 5/26/15 at 11:37 am to lsuguy124
Run the shite out of it and see if it holds up.
Posted on 5/26/15 at 11:37 am to Hammertime
quote:LINK
Can't you completely get rid of that?
Posted on 5/26/15 at 11:39 am to Elusiveporpi
quote:mehh
My brother had the same year truck and issue. The oil pressure sensor went out on him. I heard it was a common issue. located around the headers i believe. cheapish fix/ easy fix if thats the issue
#PIP4786: Low Oil Pressure Message Light - Inspect Valve Lifter Oil Filter - (Apr 5, 2010)
Subject: Low Oil Pressure Message/Light - Inspect Valve Lifter Oil Filter
Models: 2007 Cadillac Escalade
Built before April 1, 2006 with 6.2L L92 Engine
(These engines were built with AFM Hardware but the AFM system was disabled.)
2009 Buick Lacrosse Super, Allure Super (Canada Only)
2005-2007 Buick Rainier
2010 Chevrolet Camaro SS
2007-2010 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2007-2009 Chevrolet Impala
2005-2009 Chevrolet Trailblazer
2007 Chevrolet Monte Carlo
2007-2010 GMC Sierra, Yukon
2005-2009 GMC Envoy
2007-2008 Pontiac Grand Prix
2008-2009 Pontiac G8
2005-2009 Saab 97x
With an AFM (Active Fuel Management) V8 Engine RPO: L76, L94, L99, LC9, LFA, LH6, LMG, LS4, or LY5
?
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:?
Some customers may complain of a low oil pressure message/light on the dash and a technician may find a P0521 DTC in the ECM.
Recommendation/Instructions:?
If this concern is encountered, follow SI diagnosis. If it indicates that the Tech 2 oil pressure parameter is low but proper oil pressure is present at the oil filter housing, inspect the Valve Lifter Oil Filter for debris/sludge that could be restricting oil flow to the oil pressure sensor before replacing any parts.
Follow the Valve Lifter Oil Filter Removal and Installation Procedure to remove the filter for inspection. If the filter is plugged, it can normally be cleaned with brake/contact cleaner and light shop air. If it cannot be cleaned for some reason, replace it using the part number listed in the parts catalog. Do not replace the complete Valve Lifter Oil Manifold just because the filter is plugged.
#452 - Valve Lifter Oil Filter
?
Screen shot 2012-11-05 at 7.28.34 PM.png
?? ?
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.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. ? WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
Posted on 5/26/15 at 12:41 pm to meauxjeaux2
Yeah, that's what I was thinking. I have heard of a lot of people having to rebuild engines because of AFM related issues
Posted on 5/26/15 at 12:49 pm to Hammertime
quote:those lifters will sometimes round off the cam lobes. It's a major piece of shite that Chevrolet should be ashamed of not taking care of its customers with a recall for.
Yeah, that's what I was thinking. I have heard of a lot of people having to rebuild engines because of AFM related issues
Posted on 5/26/15 at 12:58 pm to Hammertime
Our company mechanic used to be a tech at a Chevy dealership and he said to prevent this you should run blended synthetic oil and change it at no more than 5000 miles no matter what the oil life thing says.
Posted on 5/26/15 at 1:54 pm to Agforlife
this is correct. The lifter actuator pan has a tiny filter screen that gets plugged up with carbon.
Carbon that is caused by running oil too long.
Carbon that is caused by running oil too long.
Posted on 5/26/15 at 3:30 pm to meauxjeaux2
Went ahead and changed oil and got lucky it was just a clogged filter. Pressure held over 30 miles so hopefully that's all it was.
Posted on 5/26/15 at 3:56 pm to lsuguy124
quote:nahh bruh. Wishful thinking. Don;t blame you though,can't hurt nothing.
Went ahead and changed oil and got lucky it was just a clogged filter
It's the small filter inside the AFM manifold under the intake that gets clogged. Actually it's not a filter at all,just a wire screen that you can clean off.
#4 on the illustration on LDMS post LINK
This post was edited on 5/26/15 at 3:57 pm
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