Steering center is that the steeringwheel is centered and level when thevehicle is traveling down a straight andlevel road. If the car is not pulling, thensteering center is controlled by the

March & April 2011

continued on page 3

ON THE WEB

www.acdelcotechconnect.com, click the TechConnect Magazine link, or

Log in to the ACDelco LMS, click theResources link

IN THIS ISSUE

Getting it Straight: Wheel AlignmentConsiderations . . . . . . . . . . . . . . . . . . . . . . . . . . . .1New Camaro ZL1 Packs Precision-Crafted Power . . . . . . . . . . . . . . . . . . .2New GM Global Diagnostic System Subscription . . . . . . . . . . . . . . . . . . . . . . .4Earn Access to GM Service Information and TIS2Web . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5Short-term GM Service Programming System Subscription . . . . . . . . . . . . . . . . . . . . . . .5Market to Women through Knowledge is Power . . . . . . . . . . . . . . . . . . . . .6Torque Wrench Calibration . . . . . . . . . . . . . . . . .6Tech Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Training Update . . . . . . . . . . . . . . . . . . . . . . . . . . .8

may require a wheel alignment, but alsokeep in mind road slope or road crown.

As a part of normal operation, vehi-cles will follow side-to-side road slopeor road crown. So, first check with thecustomer about the types of roads thatare being driven. Some drivers do notrecognize the influence of road slopeon vehicle lead/pull.

Roads typically have some degree ofcrown or slope to allow for rain run-off.Vehicles are designed to compensatefor a slight amount of road crown, butevaluating a vehicle on the wrong roadscan lead to improper diagnosis. Performa test drive on actual roads, not in aparking lot, to get a real world impres-sion of the vehicles behavior in rightand left sloping lanes.

For example, if testing the vehicle fora leads to the left concern, evaluatethe concern in the left lane as well as inthe other lanes. If the vehicle quicklyclimbs the road crown, then it mayhave an issue that needs to be lookedinto further.

In addition, a lead/pull condition whenholding the steering wheel in a levelposition may be caused by a steeringwheel angle condition. In this case, thedriver is steering the vehicle to obtain alevel steering wheel, resulting in thelead/pull effect.

Wheel alignment is a traditional customer concern that usually involvesabnormal tire wear or handling discrep-ancies such as pulling, poor tracking,or steering wheel angle that cus-tomers can easily see or feel. However,as with many repairs, the symptomsthat customers experience dont alwayspoint toward the root cause.

In many cases, a wheel alignment isnot the best place to start for a wheel-or suspension-related concern. Simpleitems to check include tire pressure,road slope or crown, and possible damage caused by impact to the vehicle.

Proper diagnosis always begins with aroad test. Check the condition and oper-ation of other components on the vehi-cle, which can indicate whether a wheelalignment will correct the condition.Plus, verify the vehicle is in OriginalEquipment condition for curb weight,tires, wheels and suspension configura-tions. Any alterations can affect vehicleperformance.

Steering

A common wheel alignment symptomis a lead/pull condition, which is theamount of effort required at the steeringwheel to maintain the vehicles straightheading at a constant speed on astraight road. Correcting this condition

Getting it Straight: Wheel Alignment Considerations

2Volume 18, Number 2 (TS-PU-0002-11)ACDelco TechConnect is published bi-monthly andonline for technicians of Total Service Support(TSS) and Key Fleet accounts to provide timelyservice information, increase knowledge andimprove the performance of the service center.ACDelco 360 represents our mission to look atour businesses at every possible angle to providevalue and assistance to our distributors andtheir customers as well as offer a full circle ofsupport with programs, tools, training andmarketing focused on enhancing and growingour partnership successfully.

Publisher:Mike DeSander

ACDelcoE-mail /

mike.desander@gm.com

Editor:Mike Militello

ACDelcoE-mail /

michael.militello@gm.com

Technical Editor:Mark Spencer

E-mail /mspencer@gpworldwide.com

Production Manager:Marie Meredith

Desktop Publishing:5by5 Design LLC

E-mail /dkelly@5by5dzign.com

Write to:*ACDelco TechConnectP.O. Box 500Troy, MI 48007-0500

On the Web::To read and search recent issues ofTechConnect online: www.acdelcotechconnect.com,

click the TechConnect Magazine link, or

Log in to the ACDelco LMS, clickthe Resources link

ACDelco service tips are intended for use by professional technicians, not a do-it-yourselfer.They are written to inform those technicians of conditions that may occur on some vehicles, or toprovide information that could assist in the properservice of a vehicle. Properly trained technicianshave the equipment, tools, safety instructions andknow-how to do a job properly and safely. If a con-dition is described, it cannot be assumed that theinformation applies to all vehicles or that all vehicleswill have that condition.All materials and programs described in this magazine are subject to change. Submission ofmaterials implies the right to edit and publish.Inclusion in the publication is not necessarily anendorsement of the individual or the company.TechConnect is published for ACDelco by SandyCorporation, Troy, MI.

2011 ACDelco. All rights reserved.

New Camaro ZL1 PacksPrecision-Crafted Power

The recentlyintroduced2012 ChevroletCamaro ZL1 ispowered bythe LSA 6.2LsuperchargedV8 engine.With an esti-mated 550horsepowerand 550 lb.-ft.of torque, theLSA is themost powerfulengine everoffered in a Camaro, including the original ZL1 engine from 1969.

The latest ZL1 engine is built on GMs legendary small-block V8 architecture. Anintercooled supercharger system, high-strength hypereutectic pistons, center-feedfuel system, piston oil squirters and premium heat-resistant aluminum cylinderheads are a few of the detailsdesigned to ensure exceptional performance.

Another feature of the ZL1 is thedeck plate honing process of thecylinder block, which helps maxi-mize engine life, reduce frictionbetween engine parts and increasehorsepower. Deck plate honing isa precision-machining process inwhich aluminum plates, calledtorque plates, are clamped to theblock to simulate the cylinderheads before the final bore andhone of the cylinders takes place.The clamp load of 10 bolts per headcreates normal, minute distortionsin the block. With the simulated cylinder heads (deck plates) areattached to the block, a boringmachine bores and then honeseach cylinder. When the actualcylinder heads are assembled tothe block under identical torqueloads, the cylinder bores are nearperfect for the engines lifetime ofpiston travel up and down in thebore up to 6,200 rpm.

The deck plating process is commonly used in applications,such as racing, where cylinder headpressures are greater than average,to ensure cylinder sealing and pre-vent scuffing of the piston againstthe bore wall. True bores and better sealing are keys to optimizing power. The finalhoning process brings the final 103.25 mm (4.06 inches) bores to within a toleranceof eight microns or .00031 of an inch.

The deck plate honing process also is used with the Corvette ZR1 and Z06 blocks. Thanks to Mike DeSander

Deck plates are installed with productioncylinder head bolts on both block head

decks. The cylinder honing head (top left)is ready to begin honing the first cylinder

LSA 6.2L supercharged V8 engine

3Wheel Alignment Considerations continued from page 1

front and rear toe settings. Be sure to road test the vehicleafter any repairs.

Wheels and Tires

Steering and vibration complaints are not always the resultof improper alignment. One possible cause is wheel and tireimbalance. Tires should all be in good shape with even wearpatterns.

Slight feather-ing or edgewear on theshoulders of tiresis not unusualand should evenout with a tirerotation. Be sureto understand thecustomers drivinghabits as this willalso heavily influ-ence the tire wear performance. Also check that tire in flation pressure is beingmaintained.

Worn Parts

Trim height the distance between the vehicle's frameand the road is the reference point for all alignment measurements. Incorrect trim height can cause bottoming outover bumps, damage to the suspension components andsymptoms similar to wheel alignment problems. There is noadjustment procedure for trim height. Check for improperweight distribution, collision damage, and worn or damagedsuspension components, all of which can alter a vehiclesgeometry and create misalignment.

A worn suspension part, such as worn struts/springs, canlower the trim height and often cause alignment problems.

Another common condition is worn ball joints, which canresult in poor handling, slow steering response, and irregulartire wear. Also, worn steering tie rods can lead to tire feather-ing by allowing the tire to wander left to right, effectivelychanging toe as the vehicle rolls down the road.

Other repairs that affect wheel alignment include controlarm replacement, engine cradle adjustment or replacement,steering gear replacement, and steering knuckle replacement.

Wheel Alignment

If its determined that a wheel alignment is required, perform the following inspections and adjustments in orderto ensure correct alignment readings:

Inspect the tires for the proper inflation and irregulartire wear

Inspect the runout of the wheels and the tires

Inspect the wheel bearings for backlash andexcessive play

Inspect the ball joints and tie rod ends for loosenessor wear

Inspect the control arms and stabilizer shaft for loosenessor wear

Inspect the steering gear for looseness at the frame

Inspect the struts/shock absorbers for wear, leaks, andany noticeable noises

Inspect the vehicle trim height

Inspect the steering wheel for excessive drag or poorreturn due to stiff or rusted linkage or suspension components

Inspect the fuel level. The fuel tank should be full or thevehicle should have a compensating load added

Also consider any excess loads, such as tool boxes, sam-ple cases, etc., that may be normally carried in the vehicle.These items should remain in the vehicle during alignmentadjustments.

If working on a vehicle requiring a 4-wheel alignment, setthe rear wheel alignment angles first in order to obtain properfront wheel alignment angles.

Equipment Calibration

Alignment machines must be regularly calibrated in orderto give correct information. Most manufacturers recommendthe following:

Alignment machines with internal reference sensorsshould be checked (and calibrated, if necessary) everysix months

Alignment machines with external reference image-based camera technology should be checked (and calibrated, if necessary) once a year

Racks must be kept level to within 1.6 mm (1/16 in).

If any instrument that is part of the alignment machine isdropped or damaged in some way, check the calibrationimmediately

Check with the equipment manufacturer for the recom-mended service/calibration schedule.

Finally, prior to making any adjustments to wheel alignmenton a vehicle, verify that the wheel alignment specificationsloaded into the wheel alignment machine are up-to-date bycomparing them to the wheel alignment specifications for theappropriate model and model year. Thanks to Mike DeSander

Typical tire feathering

GM has recently released the next generation in vehiclediagnostics, the GM Global Diagnostics System 2 (GDS 2).

GDS 2 will take the place of the Tech 2 scan tool on certainGM vehicles when communicating with and diagnosing on-board electrical systems. GDS 2 is a PC-based diagnosticapplication that gives technicians the ability to manipulatevehicle data in ways not available on the Tech 2.

As future GM vehicle architecture changes, the MultipleDiagnostic Interface (MDI)/GDS 2 combination will be thediagnostic tool used, while all other vehicles will continue touse the Tech 2.

GDS 2 is required for use with all GM Global Architecture(Global A) models, including the current generations of theChevrolet Camaro, Equinox, Cruze and Volt; Buick Lacrosseand Regal; GMC Terrain; and Cadillac SRX. The global architec-ture used in these new models does not allow electronic control module swaps between vehicles. This includes thesemodules: ECM, BCM, EBCM, SDM, ECC and IPC. If a moduleon a global architecture model is swapped out, it will result ina no start condition in both vehicles because the modulesecurity codes do not match.

Using GDS 2

GDS 2 works with simple menu-driven commands using astandard Windows interface on a PC. It enables techniciansto view much more data from many different perspectivesand offers enhanced data features.

For example,the new snap-shot feature,now identifiedas stored data,records data forthe entire diag-nostic session.Saving all diag-nostic data in thesession historyhelps eliminatethe possibility ofnot starting a snapshot recording at the correct time. Simplyclick the desired VIN to view the data.

Another GDS 2 feature is aimed at pulling vehicle informationmore quickly. The VIN decode feature pre-populates the diag-nostic screen by pulling the VIN, year, make and model. Theuser is no longer required to input this information manually.

Infrastructure

Service center IT infrastructure guidelines for using GDS 2are available at www.gmdesolutions.com. Click Techline ITSolutions > GM IT Standards. Refer to the guidelines for information on the required IT infrastructure, hardware andsoftware.

Specifications for a mobile computing device; either a laptop or a tablet PC, for use when performing diagnostic procedures on a road test as well as to reduce the amount oftime spent going back and forth between the vehicle, and a

desktop PC are avail-able, along with a listof GM Techline-approved devices.

Download and Install

GDS 2 can bedownloaded through the GM TIS2Web appli cation. It must beloaded on each shop PC individually. Once installed, GDS 2can be launched from the PC desktop icon or from TIS2Web.A security feature requires that GDS 2 be launched fromTIS2Web at least once every seven days.

Several GDS 2 subscriptions are available: 3 days for $55, 1 month for $225, and 1 year for $550.

Training

To learn more about how GDS 2 is used with the new generation of GM electrical architecture, check out the training course S-EL06-52.01WBT GM Global ElectricalSystems available on the ACDelco Learning ManagementSystem (LMS).

This Web-based training course familiarizes technicians with the new global format of service diagnostic procedures,including the common circuit types and functions used in GMelectrical architecture. Thanks to Matt Singer and Bob Stewart

4

ACDelco Offers New GM Global DiagnosticSystem Subscription

Recorded data is saved for the entirediagnostic session.

Programming Global A VehiclesThe new global architecture-based (Global A) vehicles

can be programmed using SPS (Service ProgrammingSystem). The same programming procedures should befollowed as when programming other vehicles using SPS.

During the programming process

The programming is sequential, meaning that multiplecontrol modules will be updated at the same time toprevent any conflicts that could result due to moduleshaving incompatible versions of programming.

Several modules will have a setup procedureto relearn the values of vehicle systems and components.

Several modules require a configuration procedurethat sets a security code configuring the control module to the specific vehicle, which helps preventtheft of the module. If these modules are not config-ured to the vehicle, some will be locked immediately,while others will operate initially and then lock upafter multiple key cycles.

Some programming events transfer 1040 MB ofdata, which can take from 10 to 50 minutes. Connectan approved charger to the vehicle battery to maintainstable power during programming. If voltage falls toolow, programming may cease and module damagemay occur.

5The amount of ACDelco purchases made by TSS ser-vice centers each month can pay off with access to GMService Information and TIS2Web (for vehicle calibrationsand scan tool software updates). For 2011, ACDelco offersthe GM Service Information ePromotion and the TIS2WebPromotion for WIP/WISE and WISEConnect Users.

GM Service Information ePromotion

WIP/WISEConnect users earn access to GM ServiceInformation at no additional charge for the followingmonth when they reach a target of $3,000 in ACDelcopurchases via WIP/WISEConnect in any given month.

WIP/WISEConnect users must click the GM ServiceInformation promotional link within the promotional dashboard to go to the registration site and complete theregistration. An ID and password for GM ServiceInformation will be sent.

When the meter on the promotional dashboard reaches$3,000, the link to GM Service Information will becomeactive and the user may log in.

TIS2Web Promotion for WIP/WISE andWISEConnect Users

Current TIS2Web subscribers and those that subscribeduring 2011 are eligible to earn back up to $1,000 of the2012 TIS2Web subscription fee by making ACDelco purchases online during 2011.

To participate, the Option 1 (TIS-All) TIS2Web subscrip-tion must be selected and orders of ACDelco parts mustbe made via WIP/WISEConnect in the 2011 calendar year

WIP/WISEConnect users must click the TIS2Web AllAccess promotional link within the promotional dashboardto go to the registration site and complete the registra-tion. At the end of 2011, qualifying users will be sent adiscount code to be entered when re-subscribing in 2012for the TIS-All subscription

For more information about all ACDelco promotions, contact your local ACDelco representative. Thanks to Bob Stewart

Short-term GMService ProgrammingSystem SubscriptionAvailable

Having the ability to immedi-ately access the latest automo-tive diagnostic and program-ming applications enables youto stay on top of the rapidlychanging technology in todaysvehicles and provide fast, effi-cient service to customers.However, for some TSS servicecenters, that programming capability may not always beneeded every day.

ACDelco has updated their subscription offerings forGMs Technical Information System (TIS) by adding anaffordable short-term Service Programming System(SPS) subscription. Now, service centers can get accessto vehicle calibrations when they need them whetherits for a couple days or all year long.

Access to the Service Programming System, GM ehicle calibrations, Tech 2 scan tool diagnostic softwareupdates and the new Global Diagnostic System softwareapplication is available through TIS2Web, an Internet-based subscription service that is constantly updated.

The various subscription options include:

Option 1 TIS All

All GM Tech 2 diagnostic software and vehicle calibrations

$1,395 per year

Option 2 TIS-SPS

All GM vehicle calibrations

$995 per year

$275 for 3 months

$55 for 2 days

Option 3 TIS-Tech 2 Updates

All Tech 2 scan tool diagnostic software

$750 per year

Option 4 GDS 2

GM Global Diagnostic System PC-based software forsome 2010 and newer GM vehicles

$550 per year

$225 for 1 month

$55 for 3 days

Go to www.acdelcotechconnect.com and click theTIS2Web icon on the home page for more information. Thanks to Bob Stewart

Click the link on the ePromotions dashboard to register for a promotion.

Earn Access to GMService Informationand TIS2Web

6Did you know that women control orinfluence 85 percent of buying deci-sions in this country, including the purchase and maintenance of vehicles?Yet surveys repeatedly show they oftenfeel intimidated when visiting an autoservice center. Taking the scare out ofcar care is what ACDelco envisionedwhen developing Knowledge isPower, a program aimed at helping TSSservice centers better connect withwomen customers through educationand empowerment.

At www.acdelco.com, consumerscan download a free booklet thatanswers the most commonly askedquestions about car care; and TSSshops are encouraged to order thisinformative booklet to hand out to customers or place in the waiting area.

In addition, a Knowledge is Powerseminar is available that TSS service

centers can use to attract more womencustomers into their shops. Designedby the same people who help developACDelcos industry-leading techniciantraining programs, it provides informa-tive sessions about the basics of carcare, including:

Preventive car care services andwhen they are needed

How to accurately describe vehicletroubles to a technician

How vehicle components work andwhen they may need repair,replacement or maintenance

Symptoms, noises and smells thatmay indicate potential problems

Tips for safe motor vehicle travel

How occupant safety restraintssuch as seat belts and air bagswork

Child passenger safety and teendriving tips

How to stay safe in the event of avehicle breakdown

The seminar kit includes everythingfor a successful event, including a customizable presentation, templatesof ads and promotional news releases.It also demonstrates how to engagecustomers through popular socialmedia outlets, like Facebook. These features are designed to help TSSshops connect more effectively withcustomers by empowering them withthe information they need to confident-ly make car service decisions.

Many times women attending a seminar will bring along friends, family,co-workers and driving-age children all of whom represent potential cus-tomers. ACDelco is supportingKnowledge is Power with a market-ing campaign that includes a national TVnews release, outreach to womensmedia, and engagement with influ-encers in the blogosphere.

TSS accounts can log in towww.acdelcoestore.com and searchKnowledge is Power to order, whileISC participants can contact their WDor ACDelco representative to order. Thanks to Kelly Grinnell

Marketing to WomenthroughKnowledge is Power

Improper wheel nut tightening canlead to brake pulsation and rotor damageas well as trapping the wheel on thewheel stud threads or clamping thewheel slightly off center, resulting inwheel vibration.

Although wheel installation is a com-mon procedure, make it a habit to doublecheck your work and use care wheninstalling wheels. Always refer to theproper wheel nut torque specificationsfor the vehicle being serviced.

Use a Torque Wrench

When installing a wheel, GM recom-mends hand starting the wheel nuts, andthen using the proper size socket and atorque wrench, evenly tightening thewheel nuts in the proper sequence tothe proper torque specification.

For an accurate torque wrenchreading, the final turn of the nut must betightened with the torque wrench. Whenremoving a wheel, loosen and removethe wheel nuts using a standard wrench.

Torque Wrench Calibration

Torque wrenches should be calibratedto ensure their accuracy. How often itshould be calibrated depends on its use.According to the American Society ofMechanical Engineers standard, a torquewrench used in automotive repairsshould be accurate within +/ 4% clock-wise or +/ 6% counterclockwise, from20% of its scale to full scale.

For the commonly used clicker ormicrometer torque wrench, the actualclick is considered a cycle of the wrench.Most manufacturers recommend calibra-tion after approximately 5,000 cycles, oronce a year.

Torque wrench calibration can be test-ed in the service center. Torque wrenchtesters are available from manufacturerssuch as Snap-on as well as from Kent-Moore SPX. Be sure the tester is fourtimes as accurate as the wrench beingtested. This means a 1% tester is need-ed for a typical 4% wrench. The tester

will indicate the accuracy of the wrench.If it is out of range, calibration isrequired.

Precision Instrument

Calibration can be affected by the useand care of the torque wrench. Torquewrenches are precision instruments andshould be stored in a safe place, such asin their original case in a location that isnot subject to extreme temperatures orhigh humidity.

Clicker wrenches should always beturned down to the lowest setting, but nofurther, to relax the spring and reducespring wear.

When using the torque wrench, do notdrop it or overload it with a handle orpipe extension. Using this type of exten-sion can exceed the rated torque of thewrench, causing possible wrench failure. Thanks Mike DeSander

Torque Wrench Calibration

7Diesel Exhaust Fluid FillGuidelines

2011 Ram 3500 Chassis Cab, Ram4500/5500 Chassis Cab; with the 6.7LCummins diesel engine

In order to meet applicable emissionsstandards, the 6.7L Cummins dieselengine is equipped with a SelectiveCatalytic Reduction (SCR) exhaust emis-sions aftertreatment system that injectsDiesel Exhaust Fluid (DEF) into theexhaust upstream of the SCR catalyst.The DEF reacts with the exhaust gasinside the catalyst to covert NitrogenOxides (NOx) to harmless gasses priorto release into the atmosphere.

The 8 gallon DEF tank must berefilled as needed, depending on vehicle use. The blue filler cap markedDiesel Exhaust Fluid is located behindthe cab on the drivers side of the truck.

The vehicle is equipped with a lowDEF warning system that notifies thedriver when the DEF level drops belowapproximately 2.5 gallons. The warningsystem includes messages displayed onthe information center and audiblechimes.

The first level warning displays theRefill DEF Engine Will Not Restart inXXX Miles message. If the vehicle isdriven too long with a low DEF level,the Refill DEF Engine Will Not Startmessage will be displayed. At thatpoint, the engine will no longer restartif it is turned off. A minimum of 2.5 gallons of DEF will need to be added inorder to be able to restart the engine.

Aftermarket BraidedStainless Steel Brake Lines

1997-2011 Corvette

Aftermarket braided stainless steelbrake lines installed from the frontcalipers to the frame clips may causeinterference with front wheel speedsensors.

As a result of the interference, theamber Traction Control/Active Handlingwarning lamp and the ABS warninglamp may illuminate in the instrumentcluster or Driver Information Centermessages Service ABS, Service ActiveHandling and/or Service Traction Controlmay appear while driving. DTCsC1225/C0035 and/or C1226/C0040 (left

and right front erratic wheel speed sensors) also may be set.

This condition typically occurs atlower speeds of approximately 35 mph(56 km/h) and under, and will usuallyoccur more often over bumps while driving straight or during cornering.

Before beginning any diagnosis orservice for this condition, the aftermar-ket braided stainless steel brake lineswill have to be removed and the originalequipment rubber hoses installed. If theDTCs and other concerns still exist,continue the proper diagnostic procedures.

Engine Squeal on Start-up2007 Buick Rendezvous, Terraza;

Chevrolet Monte Carlo; Saturn RELAY;2007-2008 Chevrolet Impala, Malibu,Uplander; Pontiac G6, Montana SV6;Saturn AURA, VUE; with the 3.5L V6engine or 3.9L engine

A squealing noise coming from theengine compartment or an engine vibration on start-up may be caused bythe outer ring on the crankshaft balancer slipping on the center hub.

Inspect the crankshaft balancer. If theouter ring is slipping on the center hub,replace the crankshaft balancer.

Remote Keyless EntryInterference

1997-2010 GM passenger cars andtrucks; 2003-2009 HUMMER H2, H3;2005-2009 Saab 9-7X

The GM Remote Keyless Entry (RKE)systems operate on high frequency

radio signals. Therefore, they may besubject to radio signal interference thatwill affect RKE operation.

Typical conditions that may result inreduced RKE transmitter operationinclude:

Line of sight; the transmitter signalmay be obstructed by obstaclessuch as another vehicle, a buildingor other obstructions in the lineof sight

Proximity to radio towers, airports,police and fire towers

The presence of fluorescent lighting

Installation of some aftermarketaccessories

Some brands of radar detectors,CB radios, walkie-talkies, mobileradios, and cell phone chargers mayjam the radio frequencies of theRKE system. These devices may bein the affected vehicle or may be inanother vehicle in close proximity

If only the fuel door button (someCadillac models) or the panic button (allother models) works, the system mayneed to be resynchronized. Follow thetransmitter synchronizer procedure inthe appropriate Service Information.

Resynchronization must be performedif the transmitter batteries are replaced.

The following technical tips provide repair information about specific conditions on a variety of vehicles. If you have a tough or unusualservice repair, the TSS Technical Assistance Hot Line can help. Call 1-800-825-5886, prompt #2, to speak with a technicalexpert with the latest OEM information.

Diagnostic AssistanceFor free technical diagnostic

assistance and product informationregarding specific ACDelco products,contact these toll-free informationhotlines staffed by ASE-certifiedtechnicians:

Brakes 1-888-701-6169 (prompt #1)

Chassis 1-888-701-6169 (prompt #2)

Clutches 1-888-725-8625

Lift Supports 1-800-790-5438

Shocks 1-877-466-7752

Starters and Alternators 1-800-228-9672

Steering (Pumps, Rack and Pinion,Gears) 1-866-833-5567

Wiper Blades 1-800-810-7096

The front wheel speed sensor is part of thefront wheel bearing and hub assembly.

TS-PU-0002-11

How to Take ACDelco Training

Go to www.acdelcotechconnect.comand click the Training tab to log in to theACDelco Learning Management System(LMS).

To enroll in an Instructor-LedTraining (ILT) course, click theEnrollment link or the Instructor-LedCourses link to view the catalog andselect a specific course.

To enroll in a Virtual ClassroomTraining (VCT) course, click theEnrollment link or the VirtualClassroom Training Courses link toview the catalog and select a specificcourse.

To launch a Web-Based Training(WBT) course, click the Web-BasedCourses link to view the catalog andselect a specific course.

To launch a TechAssist (TAS) course,click the TechAssists link to view thecatalog and select a specific course.

To launch a Simulation (SIM), clickthe Simulations link to view the cata-log and select a diagnostic challenge simulation.

New Training

The following ACDelco training pro-grams have recently been made available:

S-AC07-01.01VCT HVAC System:Components and Lubricants

This VCT course includes information tohelp diagnose and repair conditions relat-ed to the HVAC system. Specific topicsinclude A/C system components: com-pressor, condenser, metering device,evaporator, accumulator, and the receiver-drier. Other topics include lubricants andelectrical components for the A/C system.

S-AC07-02.01VCT HVAC System:Operation and Service Hints

This VCT course includes informationabout specific topics of A/C system oper-ation, including changes to the state ofrefrigerant, pressure and temperature,safety procedures for servicing the A/Csystem, and diagnostic procedures for common A/C conditions.

Training Schedule

To search for currently scheduled cours-es, click the Schedule link. Select searchterms from the dropdown menus andclick the Submit button.

Current Virtual Classroom TrainingCourse Number Course Name

FVCT1.09V How to Use VCT Recorded

S-AC07-01.01VCT HVAC System: Components and Lubricants

S-AC07-01.01VCT-R HVAC System: Components and Lubricants Recorded

S-AC07-02.01VCT HVAC System: Operation and Service Hints

S-AC07-02.01VCT-R HVAC System: Operation and Service Hints Recorded

S-AC07-03.01VCT HVAC System: Flushing, Recovery and Diagnostics

S-AC07-04.01VCT HVAC System: Engine Cooling, Controls and Communication

S-EL06-01.01VCT Electrical Circuit Function and Diagnosis

S-EL06-01.01VCT-R Electrical Circuit Function and Diagnosis Recorded

S-EL06-02.01VCT Testing Electrical Signal and Control Circuits

S-EL06-02.01VCT-R Testing Electrical Signal and Control Circuits Recorded

S-EL06-03.01VCT Serial Data Communication Networks

S-EL06-03.01VCT-R Serial Data Communication Networks Recorded

S-EL06-04.01VCT Communication Network Diagnosis

S-EL06-04.01VCT-R Communication Network Diagnosis Recorded

S-EM01-01.01VCT Camshaft Position Actuator Systems

S-EM01-02.01VCT Active Fuel Management Operation

S-EM01-03.01VCT Active Fuel Management Diagnosis

S-FN00-01.01VCT How to Use VCT

S-SS04-01.01VCT Advanced Steering System Diagnosis

Course Number Course Name

S-AC07-02.01ILT Automotive Air Conditioning: Advanced RefrigerantSystem Diagnostics

S-AC07-03.01ILT HVAC Control System Operation and Diagnostics

S-BK05-01.01ILT Braking Systems

S-BK05-02.01ILT ABS Operation and Diagnosis

S-EL06-04.02ILT Network Communication Diagnosis

S-EL06-10.02ILT Electrical Power Management

S-EL06-11.01ILT Automotive Electrical Circuit Diagnosis and Repair

S-EL06-11.02ILT Enhanced Automotive Circuit Diagnosis

S-EL06-12.01ILT Hybrid Technology and Service

S-EL06-13.01ILT Body Electrical: Global Diagnostics

S-EL06-14.01ILT Advanced Body Control System Electrical Diagnostics

S-EP08-02.01ILT Engine Performance: ComputerControls and Ignition System Diagnostics

S-EP08-03.01ILT Engine Performance: Air Induction and Fuel System Diagnostics

S-EP08-04.01ILT Engine Performance: Fault Monitoringand Emission System Diagnostics

S-EP08-05.01ILT Engine Performance: Advanced Drivability Diagnostics

S-EP08-81.01ILT Duramax 6600: Diesel Engine Performance

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