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NHTSA ID Number: 10113935
Manufacturer Communication Number: PIP4568S
Summary
This Preliminary Information communication provides information to the technician that some vehicles may have a Service Engine Soon lamp, engine misfire on cylinder 1, 4, 6, or 7 and/or tick noise. Technician will follow service information diagnosis first. If service information diagnosis does not isolate the cause of this concern perform a cylinder deactivation active fuel management system compression test in service information. If the running compression of the misfiring cylinder stays below 25 Pounds per Square Inch regardless of the active fuel management solenoid being commanded on or off, an active fuel management lifter is mechanically collapsed/stuck or unlocking as soon as the engine is started. Replace all active fuel management lifters, and all plastic lifter guides. Also perform the cylinder deactivation active fuel management Valve Lifter Oil Manifold Diagnosis and Testing in Service Information. If it isolates a concern with the Valve Lifter Oil Manifold, replace it and reevaluate the concern. The active fuel management lifters can also be monitored for proper operation by carefully inspecting the cylinder 1, 4, 6, and 7 rockers and valves while cranking or briefly and safely running the engine with the valve covers removed. If the valve or valves of an active fuel management cylinder stop moving while doing this test, the active fuel management lifter is causing the concern. For 2008-2009 Full Size Truck/SUV or a 2007-2009 Chevrolet Tahoe with the Police Package reprogram the Engine Control Module. On the 2008-2009 Pontiac G8, 2010-2011 Camaro, and 2007-2010 Full Size Trucks with active fuel management, also determine if the active fuel management pressure relief valve shield that is listed in the latest version of 10-06-01-008 has ever been installed. On passenger cars with the LS4 engine, determine if the updated oil pan gasket that is listed in the latest version of 11-06-01-007 has been installed.
Condition/Concern
SES light, engine misfire on cylinder 1, 4, 6, or 7 and/or tick noise.
This may be the result of an AFM lifter that unlocks as soon as the engine is started or one that is mechanically collapsed/stuck all of the time.
If an AFM lifter unlocks as soon as the engine is started, low compression will be found on that cylinder during an AFM compression test, along with a SES light, DTC P0300, and engine misfires on the related cylinder but it is unlikely that any noise will be experienced.
If an AFM lifter is mechanically collapsed/stuck, low compression will be found on that cylinder during an AFM compression test, along with a consistent valve train tick noise, SES light, DTC P0300 and engine misfires on the related cylinder.
These lifter concerns may be the result of internal locking pin damage, which may occur if the response time of an AFM lifter unlocking event is decreased due to low oil pressure, oil aeration, internal engine sludge, or an internal concern with an AFM lifter, VLOM, plastic lifter guide, lifter bore, and/or cam lobe wear.
139 Affected Products
Vehicles
MAKE | MODEL | YEAR |
BUICK | LACROSSE | 2008-2009 |
BUICK | RAINIER | 2007 |
CADILLAC | ESCALADE | 2007-2014 |
CADILLAC | ESCALADE ESV | 2007-2014 |
CADILLAC | ESCALADE EXT | 2007-2013 |
CHEVROLET | AVALANCHE | 2007, 2010-2013 |
CHEVROLET | CAMARO | 2010-2015 |
CHEVROLET | CAPRICE | 2011-2015 |
CHEVROLET | IMPALA | 2006-2009 |
CHEVROLET | MONTE CARLO | 2006-2007 |
CHEVROLET | SILVERADO 1500 | 2007-2011 |
CHEVROLET | SILVERADO 2500 | 2007-2013 |
CHEVROLET | SILVERADO 3500 | 2013 |
CHEVROLET | SUBURBAN | 2007-2014 |
CHEVROLET | TAHOE | 2007-2014 |
CHEVROLET | TRAILBLAZER | 2006-2009 |
GMC | ENVOY | 2006-2009 |
GMC | SIERRA 2500 | 2007-2013 |
GMC | SIERRA DENALI | 2007-2013 |
GMC | YUKON | 2007-2014 |
GMC | YUKON DENALI | 2007-2013 |
GMC | YUKON DENALI XL | 2007-2013 |
GMC | YUKON XL | 2007-2014 |
PONTIAC | G8 | 2008-2009 |
PONTIAC | GRAND PRIX | 2005-2008 |
SAAB | 9-7X | 2006-2009 |
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP4568S
Date: Mar-2016
https://www.nhtsa.gov/recalls?nhtsaId=10113935
MC-10113935-9999.pdf 123.015KB
Reprogramming
GM Diagnostic/Programming (TIS2Web)
Approved J2534 Device with TIS2WEB can reprogram 1996 and later All GM Modules.
To obtain the latest electronic controller calibration information for your vehicle, go to https://tis2web.service.gm.com/tis2web and enter the vehicle's 17 character Vehicle Identification Number (VIN) and select 'Get CAL ID’.
You can then compare the latest part number with the actual number installed on the vehicle to determine if a reprogram is needed.
The Service Programming System (SPS) application is part of the TIS2Web system. To program an ECU, the SPS application must communicate with the vehicle control modules using the proper J2534 programming interface tool.
The following are the supported interface tools:
The Tech 2 supports model years 1996 and beyond. With the addition of the CAN Diagnostic Interface (CANdi) module, Tech 2 is fully backward compatible with current Tech 2 functionality and operates transparently when diagnosing non-CAN-equipped vehicles.
Servicing the next generation Global A vehicles will require the diagnostic software, GDS2, Global Diagnostic System 2 running on a local PC device while the MDI is connected to the vehicle. The GM MDI is the Global Diagnostic tool for future vehicles starting with Global A vehicles.
The GM MDI was introduced in the fall of 2007 for Pass-Thru programming and offers faster programming speed. It can be used to perform Pass-Thru programming on all vehicles built since 1996 and into the future. Click here to view a list of GDS supported vehicles.
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SEOCONTENT-START
Bulletin No.: PIP4568S Date: Mar-2016 Subject: Tick Noise And/or Misfires On AFM Cylinders 1 4 6 And/or 7 Models: 2008-2009 Buick LaCrosse, Allure (Canada Only) 2007 Buick Rainier 2007-2014 Cadillac Escalade 2011-2015 Chevrolet Caprice PPV 2010-2015 Chevrolet Camaro SS 2007-2013 Chevrolet Silverado 2007-2014 Chevrolet Avalanche, Suburban, Tahoe, 2006-2009 Chevrolet Trailblazer 2006-2009 Chevrolet Impala SS 2006-2007 Chevrolet Monte Carlo SS 2006-2009 GMC Envoy 2007-2013 GMC Sierra 2007-2014 GMC Yukon 2008-2009 Pontiac G8 2005-2008 Pontiac Grand Prix GXP 2006-2009 Saab 97x With a V8 Engine and AFM (Active Fuel Management): RPO Codes L76, L77, L94, L99, LC9, LFA, LH6, LMG, LS4, LY5, LZ1 This PI was superseded to update Model years. Please discard PIP4568R. The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI. Condition/Concern Some customers may comment on an SES light, engine misfire on cylinder 1, 4, 6, or 7 and/or tick noise. This may be the result of an AFM lifter that unlocks as soon as the engine is started or one that is mechanically collapsed/stuck all of the time. If an AFM lifter unlocks as soon as the engine is started, low compression will be found on that cylinder during an AFM compression test, along with a SES light, DTC P0300, and engine misfires on the related cylinder but it is unlikely that any noise will be experienced. If an AFM lifter is mechanically collapsed/stuck, low compression will be found on that cylinder during an AFM compression test, along with a consistent valve train tick noise, SES light, DTC P0300 and engine misfires on the related cylinder. These lifter concerns may be the result of internal locking pin damage, which may occur if the response time of an AFM lifter unlocking event is decreased due to low oil pressure, oil aeration, internal engine sludge, or an internal concern with an AFM lifter, VLOM, plastic lifter guide, lifter bore, and/or cam lobe wear. Recommendation/Instructions If SI diagnosis does not isolate the cause of this concern, perform the following diagnostic steps as necessary: 1 1. Perform a Cylinder Deactivation (Active Fuel Management) System Compression Test in SI. If the running compression of the misfiring cylinder stays below 25 PSI regardless of the AFM solenoid being commanded on or off, an AFM lifter is mechanically collapsed/stuck or unlocking as soon as the engine is started. 2. Perform the Cylinder Deactivation (Active Fuel Management) Valve Lifter Oil Manifold Diagnosis and Testing in SI. If the test above isolated a possible AFM lifter concern, it will lead to this test, which tests the VLOM (Valve Lifter Oil Manifold) for proper operation. SI states a limited amount of air will leak from the bleed holes and outlet ports even when the solenoids are off, compare the amount of leakage to verify all 4 solenoids are operating the same. If it isolates a concern with the VLOM, replace it and reevaluate the concern. 3. The AFM lifters can also be monitored for proper operation by carefully inspecting the cylinder 1, 4, 6, and 7 rockers and valves while cranking or briefly and safely running the engine with the valve covers removed in the service bay. If the valve(s) of an AFM cylinder stop moving while doing this test, the AFM lifter is causing the concern. Notice: If SI diagnosis or any of the steps above indicate that any AFM lifters are unlocking or collapsed as described above, follow the applicable notes below and replace the VLOM, all AFM lifters, and all plastic lifter guides. – Reprogram the ECM with the latest calibrations if you are working on a 2008-2009 Full Size Truck/SUV or a 2007-2009 Chevrolet Tahoe with the Police Package. – On the 2008-2009 Pontiac G8, 2010-2011 Camaro, and 2007-2010 Full Size Trucks with AFM, also determine if the AFM pressure relief valve shield that is listed in the latest version of 10-06-01-008 has ever been installed for anything else. If not, remove the oil pan and install the AFM shield. If the shield has been installed before, disregard this step. On Passenger Cars with the LS4 engine, determine if the updated oil pan gasket that is listed in the latest version of 11-06-01-007 has ever been installed. If not, remove the oil pan and install this updated oil pan gasket. It is also important to thoroughly clean the inside of the oil pan while it is removed. Due to oil pan differences, this shield and gasket will not fit Mid-Size Utility Vehicles with the LH6 Engine. – Carefully inspect the camshaft lobes through the lifter bores with a pen light or bore scope to ensure that they are not obviously worn. It is suggested to rotate the crankshaft and camshaft so the entire circumference of all cam lobes can be inspected. Also inspect the lifter bores for any obvious scoring/damage that could be a concern. – When reassembling, ensure that the lifters are properly aligned to the new plastic lifter guides before they are installed. If they are not aligned properly, it may damage the plastic lifter guide once it is torqued, which may allow the lifter to turn in the guide. – Clean out the related lifter control oil passages (item 1 below) while the old lifters are removed. Generally, it is only necessary to blow through the passages with shop air but if a lot of debris is noted, it may also be necessary to flush the passages out with brake cleaner. The oil should be changed after doing this since the cylinder heads will be off to replace the lifters anyhow. – Low oil pressure to the VLOM can also cause AFM lifter damage. As a result, it is suggested to note the Tech 2 oil pressure parameter at a hot idle. This is located in the Cylinder Deactivation Data List of the Tech 2. Generally most known good vehicles will have around 25 PSI (172 KPA) or greater oil pressure at a hot idle with new engine oil. As long as there are no oil pressure sensor DTCs, such as a P0522 or P0523, the oil pressure sensor is fairly accurate. If the sensor reads 19 PSI (131 KPA) or less while at a hot idle with new oil, also perform the Cylinder Deactivation (Active Fuel Management) Oil Pressure Relief Valve Diagnosis and Testing as outlined in SI and repair as necessary. In some cases, the new VLOM could correct a low oil pressure concern if there is an internal leak or plugged VLOM filter screen. If all the previous steps have been done and there is a Repeat AFM Lifter Concern, replace the oil pump (to correct for a possible aeration of the oil) and the lifters for the cylinder with the Tick Noise and/or Misfires concern. Warranty Information For vehicles repaired under warranty use: 2 Labor Operation Description Labor Time 4062391 Lifter replacement Use Published Labor Operation Time 2810075 Engine Control module SPS programming Use Published Labor Operation Time 4065870 Oil Pan replacement Use Published Labor Operation Time 4066070 Oil Pump Replacement Use Published Labor Operation Time 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. Additional SI Keywords removal replacement installation
SEOCONTENT-END
2006 Saab-97x, 89000 miles. P0301 changed ignition coil and spark plug. Still ticking check engine light still has a ticking noise. Help please ????
You need to have your vehicle properly diagnosed, you may have another issue.