Duramax Diesels Forum Truck of the Week
  #16  
Old 07-09-2011, 04:32 PM
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jmaz268 jmaz268 is offline
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Quote:
Originally Posted by ripmf666 View Post
Service Information


2005 GMC Truck Envoy - 4WD | Envoy, Rainier, TrailBlazer, Ascender VIN S/T Service Manual | Preliminary Information | Document ID: 2435251

#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




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.

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2011 General Motors. All rights reserved.
A friends Denali is doing the same thing....rough Idle, comes and goes it seems. Just started in the past day. Where exactly is this filter at? Under the valve covers? Hard to tell from the pics and I don't have easy access to the truck to see it.
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  #17  
Old 07-09-2011, 05:12 PM
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ripmf666 ripmf666 is offline
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Service Information


2007 GMC Truck Yukon Denali | Avalanche, Escalade, Suburban, Tahoe, Yukon VIN C/K Service Manual | Document ID: 1697127

Valve Lifter Oil Filter Replacement
Removal Procedure

  1. Remove the intake manifold. Refer to Intake Manifold Replacement.
  2. Disconnect the engine harness electrical connector (1) from the oil pressure sensor.

  3. Remove the oil pressure sensor (1) and washer (2).
  4. Remove and discard the valve lifter oil filter (3).
  5. Remove and discard the valve lifter oil filter O-ring seal (4).
Installation Procedure

  1. Install a NEW valve lifter oil filter O-ring seal (4) into the valve lifter oil manifold.
  2. Install the NEW valve lifter oil filter (3).
  3. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the threads of the oil pressure sensor.Notice: Refer to Fastener Notice in the Preface section.
  4. Install the oil pressure sensor washer (2) and sensor (1).Tighten
    Tighten the sensor to 35 Nm (26 lb ft).


  5. Connect the engine harness electrical connector (1) to the oil pressure sensor.
  6. Install the intake manifold. Refer to Intake Manifold Replacement.
2011 General Motors. All rights reserved.
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  #18  
Old 07-09-2011, 05:19 PM
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jmaz268 jmaz268 is offline
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thanks henry...helps a ton
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  #19  
Old 12-06-2012, 08:43 AM
jd_ss jd_ss is offline
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So what fixed the problem? Same issue here!
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