File In Section: 06 -Engine Service Bulletin Date: June, 2016

File in Section:Service BulletinBulletin No.:Date:06 - Engine08-06-01-011 KJune, 2016TECHNICALSubject:Malfunction Indicator Lamp On -Check Engine Light, DTCs P0011, P0014, P0021,P0024, P0341, P0346, P0366 or P0391 Set (Check Camshaft End Play and PerformAction as Outlined)Models:2007-2009 Buick Lacrosse, Allure (Canada Only)2007-2010 Buick Enclave2010 Buick Lacrosse2007-2010 Cadillac CTS Sedan, CTS Sport Wagon, SRX, STS2008-2010 Chevrolet Equinox, Malibu2009-2010 Chevrolet Traverse2010 Chevrolet Camaro2007-2010 GMC Acadia2007-2010 Pontiac G62008-2009 Pontiac G8, Torrent2007-2010 Saturn AURA, OUTLOOK2008-2010 Saturn VUEEquipped with 2.8L or 3.6L High Feature V6 Engine (VINs D, T, V, 7 - RPOs LP1, LLT,LY7)Attention:This Bulletin also applies to any of the above models that may be Export from NorthAmerica vehicles.This Bulletin has been revised to update the Note in Step 7 of the Correction table. Pleasediscard Corporate Bulletin Number 08-06-01-011J.ConditionSome customers may comment that the check enginelight is on.Upon investigation, the technician may find one or moreof the following DTCs stored: P0011 P0014 P0021 P0024 P0341 P0346 P0366 P0391Copyright 2016 General Motors LLC. All Rights Reserved.

June,2016Page 2Bulletin No.: 08-06-01-011 KCorrectionStepYesNo1Is the vehicle an Acadia, Enclave, Traverse or Outlook with P0011,P0014, P0021 orP0024?Go to Step 2Go to Step 32Reprogram the ECM. Refer to Service Bulletin 08-06-04-011 for furtherinformation.Do P0011, P0014, P0021 or P0024 still set?Go to Step 3Return vehicleto customer3Important: The set OTC will determine which camshafts {bank 1 or bank2) should be checked.Remove the camshaft cover and check camshaft end play on bothcamshafts in the suspect head using one of the methods listed below.Is camshaft end play equal to or over 0.40 mm (0.016 in)?Go to Step 5Go to Step44Continue diagnosis using SI and call GM Technical Assistance, ifnecessary.5Check the gap between BOTH camshaft position actuators and the frontcamshaft cap using the Camshaft Position Actuator to Front CamshaftCap Measurement Procedure listed below.Does the 2.0 mm (Delphi 4 screw actuator) or 2.5 mm (Aisin 5 screwactuator) hex (alien) wrench fit between the position actuator and cap?Go to Step 7Go to Step66Install the camshaft thrust washers using the Camshaft Thrust WasherInstallation Procedure listed below.See parts table for correct trust washer part number: Delphi vs Aisindesign.----ActionNote: There are two generations of replacement service cylinder heads.New design cylinder heads do not use the thrust washers. Reference theparts catalog or Bulletin 16-NA-085 for identification. A instruction sheet isalso provided with the new design cylinder head.7Replace the cylinder head and install thrust washers using the CamshaftThrust Washer Installation Procedure listed below.See parts table for correct trust washer part number: Delphi vs Aisindesign.Two methods for measuring camshaft end play:Camshaft End Play MeasurementProcedureMethod 1: Dial IndicatorRemove the camshaft cover from the suspectcylinder head.21063202056722

Bulletin No.: 08-06-01-011 KJune,2016Page 320620902106322Set-up a dial indicator on the camshaft to bemeasured. Set the dial indicator to measure theaxial movement of the camshaft. To minimizemeasurement error, the dial indicator needs to beon the same axis as the camshaft. A magneticmount can be placed on the frame rail or a pieceof steel plate can be bolted to the top of the headas a reference surface for the dial indicator. Thedial indicator should have 0.1 mm (0.001 in) ofresolution. Position a screwdriver or small pry bar betweenthe camshaft cap and camshaft lobe. Apply forceto move the camshaft rearward.Be cautious not to damage the camshaft lobewhile applying this force.Zero the dial indicator.Apply force to move the camshaft forward(towards the camshaft phasers).Read the dial indicator. This is the end play of thecamshaft shaft.Notice: Do not use the phaser bolt as a pry point. Thismay cause damage to the camshaft sensor targetwheel or the head to camshaft cover sealing surface.Method 2: CaliperThe caliper should have 0.1 mm (0.001 ") of resolution.2056724

Page 4June,2016Bulletin No.: 08-06-01-011 KDelphi Actuator (4 Screw Design, Use 2.0 mm Hex Wrench)2056726 Position a screwdriver or medium pry bar betweenthe camshaft cap and camshaft lobe. Be cautiousnot to damage the camshaft lobe while applyingthis force.Apply force to move the camshaft rearward.Measure and record the distance between thecamshaft cap and the camshaft lobe.Re-measure and record the distance between thecamshaft cap and camshaft lobe. Subtract the tworeadings; this is the camshaft shaft end play.Camshaft Position Actuator to FrontCamshaft Cap Measurement Procedure21772235 Screw Aisin Design ActuatorUse a 2.5 mm hex (alien) wrench as a determinationgauge to measure the gap between the rear of thecamshaft position actuator and the front camshaft capof both camshafts of the suspect head.1. Position a screwdriver or medium pry bar betweenthe camshaft cap and camshaft lobe.2. Apply force to move the camshaft FORWARD. Becautious not to damage the camshaft lobe whileapplying this force.Important: Before performing this procedure, inspectthe rear of the camshaft position actuator. Refer to thepictures below to determine which actuator is installedon the vehicle. Use the appropriate procedure listedbelow.Aisin Actuator (5 Screw Design, Use 2.5 mm Hex Wrench)21772263. With the camshaft moved fully FORWARD, try toinsert the 2.5 mm hex (alien) wrench between theintake camshaft position actuator and the frontcamshaft cap. It may be necessary to turn thewrench to align the flat sides of the wrench with thegap between the actuator and the cap.2177225

Bulletin No.: 08-06-01-011 KJune,20164. If the wrench fits between the camshaft positionactuator and the front camshaft cap, it will benecessary to replace the cylinder head assembly.WHEN REPLACING THE CYLINDER HEAD,ALSO INSTALL A THRUST WASHER BETWEENEACH CAMSHAFT POSITION ACTUATOR ANDTHE FRONT CAMSHAFT CAP. See parts tablefor correct trust washer part number: Delphi vsAisin design.5. If the wrench DOES NOT fit between the camshaftposition actuator and the front camshaft cap, installthe camshaft thrust washers between BOTHcamshaft position actuators and the front camshaftcap on the suspect head. Follow the CamshaftThrust Washer Installation procedure below. Seeparts table for correct trust washer partnumber: Delphi vs Aisin design.4 Screw Delphi Design ActuatorUse a 2.0 mm hex (alien) wrench as a determinationgauge to measure the gap between the rear of thecamshaft position actuator and the front camshaft capof both camshafts of the suspect head.1. Position a screwdriver or medium pry bar betweenthe camshaft cap and camshaft lobe.2. Apply force to move the camshaft FORWARD. Becautious not to damage the camshaft lobe whileapplying this force.Page 5CAMSHAFT POSITION ACTUATOR AND THEFRONT CAMSHAFT CAP. See parts table forcorrect trust washer part number: Delphi vsAisin design.5. If the wrench DOES NOT fit between the camshaftposition actuator and the front camshaft cap, installthe camshaft thrust washers between BOTHcamshaft position actuators and the front camshaftcap on the suspect head. Follow the CamshaftThrust Washer Installation procedure below. Seeparts table for correct trust washer partnumber: Delphi vs Aisin design.Camshaft Thrust Washer InstallationProcedureSpecial Tools EN 48313 Timing Chain Retention Tool (2009 andPrior- Both Heads, 2010 LAU Engine - BothHeads, 2010 - Left Head Only) EN 49982 Timing Chain Retention Tool (2010 Right Head Only)Tip: The cylinder head gasket kit contains all thegaskets and seals necessary to perform this repair.1. Disconnect the engine wiring harness electricalconnectors from the intake and exhaust camshaftposition (CMP) actuator solenoid valves andsensors.2. Remove the intake and exhaust CMP sensor boltsand sensors.3. Remove the intake and exhaust CMP actuatorsolenoid valve bolts and valves.21772263. With the camshaft moved fully FORWARD, try toinsert the 2.0 mm hex (alien) wrench between theintake camshaft position actuator and the frontcamshaft cap. It may be necessary to turn thewrench to align the flat sides of the wrench with thegap between the actuator and the cap.4. If the wrench fits between the camshaft positionactuator and the front camshaft cap, it will benecessary to replace the cylinder head assemblyand replace both actuators. It is not necessary toreplace the camshaft position actuators on thecylinder head that is not being replaced. WHENREPLACING THE CYLINDER HEAD, ALSOINSTALL A THRUST WASHER BETWEEN EACH1306293Important: Rotate the crankshaft balancer bolt in aclockwise direction ONLY.4. Rotate the crankshaft balancer using the balancerbolt until the camshafts are in a neutral (lowtension) position. The flats on the rear of thecamshafts will be parallel with the camshaft coverrail(1).

Page 6June, 2016Bulletin No.: 08-06-01-011 Kbody of the tool (2) is adjacent to the top surface ofthe cylinder head (1 ). This is the approximateinstalled position.34113063915. Use a paint stick to create an alignment mark onone of the timing chain links (2) and the adjacenttooth on the exhaust camshaft positionactuator (1 ).6. Use a paint stick to create an alignment mark onone of the timing chain links (3) and the adjacenttooth on the intake camshaft position actuator (4).7. Use an open end wrench on the hex cast into thecamshaft in order to prevent engine rotation whenloosening the camshaft position actuator bolts.Slightly loosen the camshaft position actuatorbolts. DO NOT remove the bolts.\4321858602Important: The engine front cover is removed forclarity in the following graphics, but NOT required toperform the procedure.10. Ensure that the feet (4) on the legs of the tool arefacing the front of the engine.11. Partially expand the legs (1, 3) of the Timing ChainRetention Tool by turning the T-shaped handleclockwise.12. Insert the leg of the tool (1) behind the timing chainguide (2).13. Continue expanding the Timing Chain RetentionTool until the legs (1, 3) contact the timing chain.Do not tighten at this time.18586018. Unscrew the Timing Chain Retention Tool so thatthe legs of the tool are retracted.9. Insert the Timing Chain Retention Tool betweenthe camshaft actuators, rearward of the timingchain until the bottom line that is scribed in the1858603

Bulletin No.: 08-06-01-011 KJune,2016Page 7Important: Ensure that the foot (1) of the Timing ChainRetention Tool is engaged into one of the link pocketsto prevent tool slippage during tightening of the TimingChain Retention Tool.14. Hand tighten the Timing Chain Retention Tool. Ifinstalled correctly, there should be a small amountof slack in the timing chain between the camshaftposition actuator sprockets.2173634185860515. The Timing Chain Retention Tool is now properlyinstalled to hold the timing chain in position.1858699Tip: It is not necessary to completely remove thecamshaft actuator from the engine in order to install thethrust washers.16. Remove the intake camshaft position actuator bolt.17. Move the camshaft position actuator forwardenough to slip the camshaft thrust washer over thefront of the intake camshaft and position it againstthe cylinder head.18. Position the intake camshaft actuator to thecamshaft and install the actuator bolt hand tight. Ifnecessary, slightly rotate the camshaft to engagethe timing pin.19. Remove the exhaust camshaft positionactuator bolt.20. Move the camshaft position actuator forwardenough to slip the camshaft thrust washer over thefront of the exhaust camshaft and position itagainst the cylinder head.21. Position the exhaust camshaft actuator to thecamshaft and install the actuator bolt hand tight. Ifnecessary, slightly rotate the camshaft to engagethe timing pin.22. Remove the Timing Chain Retention ToolEN-48313.