Archive for July 2015

Advanced Diagnostics – Proactive Alert Expands for 2016, Adds New Models

The new Advanced Diagnostics – Proactive Alert service monitors the engine cranking and fuel delivery systems for certain performance issues and notifies owners through OnStar® to help avoid potential vehicle conditions. It replaces the previous Vehicle Health Management (VHM) service.

 

Print

Fig 1

 

In addition to the new name, the service has been expanded for 2016 and is available on the following models that are also enrolled in OnStar Vehicle Diagnostics:

 

• 2016 Corvette equipped with RPO LT1 or LT4

• 2016 Silverado LD, Sierra LD equipped with RPO LV3, L83, L86 or L8B

• 2016 Escalade, Escalade ESV equipped with RPO L86

• 2016 Suburban, Tahoe, Yukon, Yukon XL equipped with RPO L83

• 2015-2016 Equinox and Terrain equipped with RPO LFX

 

 

The Proactive Alert service is designed as a preventive measure. Owners must enroll in OnStar Vehicle Diagnostics and the Proactive Alert service.

 

The vehicle systems monitored by the Proactive Alert service include battery and starter performance in the engine cranking system and fuel tank fuel pump module and fuel pressure sensor performance in the fuel delivery system.

 

Communication Process for 2016 Models

 

If an issue is identified on a 2016 model, a Proactive Alert service message is generated and will be played through the vehicle’s audio system shortly after the vehicle is started. In addition, a text message and email (Fig. 2) will be sent to the customer using the phone number and email address provided when enrolling in the service through OnStar.

 

F02 Cust E Mail

Fig. 2

 

Beginning later this year, an email also will be sent to the Customer Experience Manager at the preferred service provider (GM dealership) that the customer selected when enrolling in the service.

 

If a service message is unclear when the vehicle arrives at the dealership, press the blue OnStar button in the vehicle to contact an OnStar advisor. All Proactive Alert service messages on 2016 models sent to the customer are available through OnStar.

 

Communication Process for 2015 Models

 

If an issue is identified on a 2015 model, a Proactive Alert service message is generated and sent via OnStar to the Customer Assistance Center (Customer Care Centre in Canada), which will contact the customer and help schedule a service appointment with the preferred service provider. An email also is sent to both the customer and the preferred service provider.

 

If a service message is unclear once the vehicle arrives at the dealership, contact the Dealer Business Center Aftersales (or Customer Care Centre in Canada) in order to proceed in the appropriate diagnostic direction.

 

TIP: Since the system is monitoring for potential conditions, some Proactive Alert service messages may be generated without any apparent symptoms being noticed by the driver.

 

Service Message Identifiers

 

Currently, there are nine different Service Message Identifiers. These are not Diagnostic Trouble Codes (DTC). The identifiers combine the related Service Information section with a number, which can be used in a Service Information key word search. For example, 12 volt battery is covered under the Starting and Charging section, so the first battery Service Message Identifier is SAC001.

 

The Proactive Alert service messages are not stored in the vehicle and cannot be retrieved using a scan tool as would a DTC. Related on-board DTCs may or may not be set.

 

To begin vehicle diagnosis and repairs, review the Service Message Identifier in the message provided by the owner, the Customer Assistance Center (or Customer Care Centre) for 2015 models, or OnStar for 2016 models.

 

Following are the Service Message Identifiers. Refer to #PI1250B for complete diagnostic procedures for each identifier.

Screen Shot 2015-07-24 at 10.42.40 AM

All parts replaced under this program are requested back by the Warranty Parts Center.

 

Once the proper repairs have been made, the Proactive Alert service will clear the service message after the vehicle is operated over a number of ignition cycles. If other on-board DTCs have set, clear them prior to releasing the vehicle to the owner.

 

Due to the unique nature of the Proactive Alert service, special Bulletin Only Labor Operations have been set up for repairs of identified service messages. These Bulletin Only Labor Operations must be used for any repairs related to a service message.

 

For additional information about the Advanced Diagnostics – Proactive Alert service, including the special Labor Operations, refer to #PI1250B.

 

– Thanks to Len Tillard

The Next Generation of GlobalConnect

When you log in to GlobalConnect for access to the Service Information, TIS2Web and many other Techline applications, you’re now presented with the next generation of GlobalConnect that not only looks different, but also has a number of new features. (Fig. 3) The navigation and functionality of the updated site has been updated to deliver more information in an easy-to-use format. Here’s a look at some of the features of the new GlobalConnect.

 

F03 GC home page

Fig. 3

 

App Center

 

Applications, information and programs are provided as apps on the new GlobalConnect. Click the App Center tab at the top of the home page to view the apps in the following categories: Order, Sales, Service, Parts, Business Office, Fleet & Commerical, and Marketplace.

 

Departments

 

Click the Departments tab and then select a department to go the main page of that department, such as Service (Fig. 4) or Parts. The main page includes headlines, applications, a reference library and quick links to other programs.

 

F04 GC service main

Fig. 4

 

Center of Learning

 

The Center of Learning tab provides a direct link to the Center of Learning so a separate login is not needed.

 

Support

 

Click the Support tab for additional information on several categories: Applications, Center of Learning, Certified Pre-Owned, Forms, Pre-Sales and Service. The Service category includes FAQs on GlobalWarranty, labor time guide, special policy reimbursement and much more.

 

My Shortcuts

 

The My Shortcuts tab lists all the shortcuts to your apps that you have created. (Fig. 5) Creating a shortcut is a convenient and easy way to access the features you use every day.

 

F05 GC shortcut page

Fig. 5

 

Technicians should consider adding the following shortcuts found under the Service category:

• Investigate Vehicle History

• Calibration ID

• Technician Forum

• Service Information (SI)

• Pre-Delivery Inspection Forms

• Vehicle Identification Number (VIN) Information

• TIS2WEB

• Service Forms

• TechLink

 

 

Connecting to the new GlobalConnect

 

Here are several tips to use when first logging in to the new GlobalConnect.

 

Internet Explorer

If you use Internet Explorer and are having problems logging in the new portal, you may need to update your Internet Explorer browser Trusted Sites.

 

In an Internet Explorer browser window:

1. Click the Settings icon in the top-right corner.

2. Select Internet options, followed by Security and Trusted sites.

3. Click the Sites button and add https://*.autopartners.net.

4. Click Add and then Close.

5. Reopen the browser to launch GlobalConnect.

 

 

 

Email Validation Receipt Timing

Email providers do not always provide immediate messages. Some mailboxes may take up to 20 minutes for a message to appear in the inbox. Please be patient with the timing of receiving your email from GlobalConnect. Also check your spam or junk email folder. If the validation email is in the junk folder, move it to the Inbox before clicking on the validation link.

 

Creating Shortcuts

Shortcuts are not migrated from the old portal, so they need to be set up again in the new GlobalConnect. A shortcut can be created that links to any content or App, including TechLink.

 

To create a shortcut in the App Center:

1. Within the App Center, all apps are listed by department. (Fig. 6) Use the Search of Apps Filter to locate an app.

 

 

F06 GC service page

Fig. 6

 

2. Click the app icon to display the app details.

3. Click the Add to My Shortcuts button to create the shortcut. (Fig. 7)

 

 

F07 GC shortcut button

Fig. 7

4. The shortcut is now available on the My ShortCuts page. To view, click the My Shortcuts tab.

 

– Thanks to Lisa Scott

Battery Saver Message or Low Battery Indicator Displayed

A Battery Saver message (Fig. 8) or red battery indicator (Fig. 9) may be displayed in the Driver Information Center on some 2014-2015 Spark EV, ELR; and 2011-2015 Volt models. There may or may not be any low voltage DTCs or DTC P0AF8 (Hybrid System Voltage) set in history and the Check Engine Lamp or Service Vehicle Soon indicator may or may not be displayed.

 

F08 Battery Saver Message r

Fig. 8

 

F09 voltcluster

Fig. 9

 

If any of these conditions are present, check to see whether the 12V battery may have been severely discharged. Use the GR8 Battery Tester to test its condition. The Battery Saver message will illuminate at voltages of 11–12 volts without displaying the red battery indicator. The red battery indicator will illuminate at voltages below approximately 11 volts.

 

Also perform the DC Power Conversion Test published in the appropriate Service Information to check for maximum current and voltage output. This test requires the use of a carbon pile load tester. Use a scan tool to select the 14V Power Module Control Function in the ECM and Accessory Power Module Setpoint in the BCM to check that the system is able to respond to current loads.

 

If the 12V battery was discharged, charge it to remove the Battery Saver message. Allow a drive cycle afterwards before maximum Accessory DC Power Converter Module (APM) output to occur and for the Battery Saver message to be removed.

 

If the test fails or if there are low voltage DTCs or DTC P0AF8 set, confirm that the 200 amp fuse located in the X50D fuse block is torqued to the correct specification. Voltage should be checked on both sides of the 200 amp fuse with a digital multi-meter while there is a load applied. Voltage drop can be checked from the positive battery post to the APM side of the 200 amp fuse as well.

 

If the APM will output current under a load but the voltage is low on both sides of the fuse when compared to the voltage output at the APM, check the following:

• Follow the appropriate Service Information for any other DTCs

• The APM output terminal is clean and torqued to specification

• The APM output cable ring terminal is properly seated to the APM output terminal post

• Test the voltage drop on the ground cables to the engine block, transmission, body and chassis to ensure that they are within specification

 

– Thanks to Brian Ciaverella

Lack of Power in High Ambient Temperatures

Some 2010-2013 Avalanche, Silverado, Sierra; and 2010-2014 Suburban, Tahoe and Yukon models equipped with the 5.3L cast iron block engine (RPO LMG) may experience a lack of power on initial acceleration from a stop when the ambient temperature is approximately 103° F (39° C)or greater. There also may be engine detonation or pre-ignition type events as temperatures approach 120° F. No DTCs will be set.

 

The vehicle is being operated using low octane fuel. In addition, this condition is most likely to occur on vehicles with a 3.08 axle ratio.

 

If this condition is found, perform all appropriate Service Information (SI) diagnostics, document all test results, and repair as necessary.

 

If SI diagnosis does not isolate the cause of the condition, take a Tech 2 snapshot of the condition happening and note the Spark Parameter in the Ignition Data List. If it drops near/below 0 degrees during the condition, check to see whether  there is a cylinder that shows any knock. If knock occurs, perform a top engine clean.

 

If the condition is still present, recommend that premium fuel (91 octane or higher) with detergents (TOP TIER Fuel) be used when ambient temperatures exceed 110° F. This should provide a slight improvement in engine performance when ambient temperatures are especially high.

 

For a list of gasolines that have met the TOP TIER detergent standards (Fig. 10), refer to Bulletin #05-06-04-022M or go to www.toptiergas.com.

 

F10 top tier logo

Fig. 10

 

– Thanks to Richard Renshaw

New Calibrations for the ECM and TCM

If a 2015 Colorado or Canyon equipped with the 3.6L V6 engine (RPO LFX) exhibits any of the following engine or transmission conditions, complete the following procedure before replacing any parts or performing other repairs.

 

Engine/Transmission Conditions:

• Flashing or solid malfunction indicator lamp (MIL) with a misfire

• Rough idle

• Lack of engine performance

• Tip in bump

• Stall at idle after climbing and descending a mountain grade

• Low-speed chuggle

• Cruise engagement bump with too much feel

• Shift busyness

• Illuminated MIL with DTC P0326 (Knock Sensor Performance Bank 1) or P0331 (Knock Sensor Performance Bank 2)

• Detonation, spark knock or an abnormal ticking noise

 

If any of these conditions are present, reprogram the ECM and TCM with the latest available calibrations in TIS2WEB. Reprogram both modules at the same time.

 

– Thanks to Aron Wilson

 

Engine Harness Routing Conditions

One or more of the following conditions may be present on a 2013-2015 Equinox or Terrain equipped with the 3.6L V6 engine (RPO LFX):

• Intermittent starter-type chatter noise

• Longer than usual engine crank cycle

• Intermittent illuminated Service Engine Soon lamp

• Intermittent illuminated low oil pressure lamp on

 

One or more of the following DTCs also may be set: P0261, P0264, P0267, P0270, P0273, P0276, or P0641.

 

If any of these conditions are found, inspect the engine wire harness routing. The engine harness may be to too close to the rear of bank #2 valve cover (left cylinder head) and fastener bolt heads. (Fig. 11)

 

F11 4200762

Fig. 11

 

Inspect the wrapped portion of the harness between the ECM and the upper rear of the engine for a rubbing condition causing a circuit short. Repair the wiring and harness protective wrap and reposition the harness away from the engine.

 

– Thanks to Jim Miller

 

Wet Front Floor Carpet

Some 2015 Silverado 1500 and Sierra 1500 pickups built after March 1, 2015, may have a water leak that leaves the left or right front floor carpet wet.

 

Pull back the carpet on affected side (left or right) at the kick panel and perform a water test. If the leak is found to be coming from the seam (Fig 12, # 1) at the front kick panel (right side shown; left side is similar), it will be necessary to remove the front fender to gain access to the vertical cowl seam (Fig 13, # 2) that is leaking.

 

F12 4203643

Fig. 12

 

F13 4203645

Fig. 13

 

To repair, apply clear, flowable seam sealer to the cowl seam (Fig 14, # 3) and into the pocket (Fig 15, # 4; Fig. 16, # 5) as shown (right side shown; left side is similar).

 

F14 4203649

Fig. 14

 

F15 4203651

Fig. 15

 

F16 4208297

Fig. 16

 

– Thanks to Scott Fibranz

Power Steering Conditions and Service Power Steering Message

Some 2015 Colorado and Canyon models may have a loss of power steering assist, a hard to steer condition or display a Service Power Steering message on the Driver Information Center. These conditions may be intermittent.

 

F17 canyon

Fig 17

 

Check the Power Steering Control Module (PSCM) for DTCs. If DTC C056D (Electronic Control Unit Hardware) is set, reprogram the PSCM with the latest calibrations available in TIS2WEB. If DTC C0545 (Steering Wheel Torque Sensor) is set, contact the GM Technical Assistance Center for additional information.

 

– Thanks to Ken Cole

Tire/Wheel Balancing Machines

During tire and wheel diagnosis for a vibration condition, it’s necessary for dealerships to have GM-approved tire force variation measurement equipment (Fig. 1) that can address imbalance, out of round and tire force variation conditions. The right equipment is a valuable tool in diagnosing vehicle ride concerns. Some older equipment may not be capable of meeting today’s requirements for road force balancing.

 

F01 balancer image

Fig. 1

 

Proper tire and wheel diagnosis includes inspecting the tires and wheels as well as road testing the vehicle. If the road test indicates a shake/vibration condition exists, use a calibrated off-car dynamic balancing machine to check the imbalance of each tire/wheel assembly.

 

Balancer Calibration

 

TIP: Tire and wheel assembly balancer machine calibration should be checked regularly. If it’s is used frequently, the machine should be calibrated at the start of every day. Refer to the Tire and Wheel Balancing procedures in the appropriate Service Information. Some newer machines are self-calibrating.

 

If a vibration or shake still exists after balancing, any out of round conditions of the wheel and force variation conditions of the tire must be addressed. GM-approved tire force variation measurement equipment can address both.

 

RFV Measurement

 

Tire radial force variation (RFV) measurement equipment loads the tire, similar to on the vehicle, and measures radial force variation of the tire/wheel assembly. To isolate the wheel, its runout must be measured. If the wheel meets the runout specification, the tire’s RFV can then be addressed. After measuring the tire/wheel assembly under load, and the wheel alone, the balancing machine then calculates the radial force variation of the tire.

 

The tire force variation measurement equipment can find the low point of the wheel (for runout) and the high point of the tire (for radial force variation). This allows the tire to be matched mounted to the wheel for lowest tire/wheel assembly force variation.

 

TIP: When mounting a wheel to a wheel balancer/force variation machine, always use the wheel’s center pilot hole. This is the primary centering mechanism on all GM wheels; the bolt holes are secondary. Usually a back cone method to the machine should be used.

 

Cone Dimensions

 

Cones and collets are sized slightly larger to allow easy placement onto, and removal from, the shaft. If the cone/collet ID is 1.578-inches or greater, it is out of specification and should be discarded. Cones/collets that have wear and scars on the OD should also be discarded and replaced. Do not drop or pile up cones and collets. They should be placed in their respective locations on a rack or shelf to protect them from damage. On many balancers, there is an integrated shelf available for the collets. Wipe down the spindle and collets periodically to keep them clean. Do not use harsh cleaners like brake parts cleaner.

 

Identifying Balancing Machines

 

There are several GM-approved wheel balancers available through GM Dealer Equipment. Go to www.gmdesolutions.com for more information (U.S.). In Canada, go to www.des-canada.ca.

 

The Hunter Road Force Wheel Balancer is commonly used for tire force variation measurement in GM dealerships. There are several generations of the wheel balancer in use, each with different capabilities. Generations 3 and 4 are recommended to ensure consistent, accurate results with difficult vibration conditions.

 

Some early generations may require several inspections to determine if any major components are worn. For example, measure around the shaft at several points with a caliper or micrometer. Since the shaft is tapered, measure it at the spring plate, not at the end of the shaft. If the shaft has more than 0.002-inches of wear (the shaft is 1.572 inches or less), it is out of specification.

 

To help identify the different generations of the equipment, look at features such as the monitor type and roller size.

 

Screen Shot 2015-07-09 at 11.55.45 AM

 

– Thanks to Dave MacGillis and Chuck Berecz

New Service Information Search Functions

Several enhancements were recently made to GM Service Information based on user feedback, making it easier to search for specific information and providing quick access to commonly used information.

 

Bulletin Search

 

When performing a bulletin, campaign and preliminary information search, users can now search by Year Range, Model and Keyword. (Fig. 2)

 

F02 si options

Fig. 2

 

The Model option (Fig. 3) is a new function, replacing the Platform option. Now, users can select the Model — Silverado-4WD — rather than the Platform — K-Truck — that may not have been known.

 

F03 search model

Fig. 3

 

Keyword Search Default

 

Another new search function is that the Service Information application now remembers the last search default, either Documents or Titles. (Fig. 4) Click the Search drop-down menu at the top of the screen when performing a Basic or Advanced search to change the search default.

 

Previously, the user was always returned to Documents as the default search. Now, if Titles was selected when performing a service manual search, the default search of Titles will be maintained when going to another publication, such as owner manuals, when performing a search.

 

F04 search titles docs

Fig. 4

 

The Service Information application still defaults to the Basic search. The Basic search function enables the user to search the entire document or document titles with as many as five keywords. Valid keywords appear in the Symptom and DTC keyword lists.

 

The Advanced search function (Fig. 5) allows the user to search the entire document or document titles with a phrase with as many as five words. For example: throttle position sensor. Valid search characters also include slash (/), period (.) and hyphen (-). For example: a/c, 5.7L.

 

F05 search phrase

Fig. 5

 

TIP: Labor codes are not part of the title. To return a result when searching labor times, the default needs to be set to Documents.

 

Quick Links

 

Two new quick links have been added to the top of the search page. All quick links are located in the Keyword Search function after building the vehicle.

 

The new Maintenance Items link (Fig. 6) provides a listing of the maintenance procedures and associated links or instructs users where to find the maintenance procedures, including fluid capacities. The other new quick link is the RPO Code List. It provides all RPO codes for the vehicle that was built in the search fields.

 

Other quick links include Diagnostic Starting Point, Diagnostic Trouble Code List, and Symptom List.

 

F06 maintenance items r

Fig. 6

 

Search Help

 

For additional tips on using the Service Information search functions, click the Search Help link at the top of the screen.

 

If you have any questions on how to use the Service Information, contact the Techline Customer Support Center at 1-800-828-6860 (English) or 1-800-503-3222 (French).

 

– Thanks to Lisa Scott

Printing Service Information Graphics

GM Service Information features many graphics that may be more helpful during repairs when printed. TIFF and CGM graphic viewers must be downloaded by the user in order to view the enhanced graphics (Fig. 7) and have access to new print features.

 

F07 si graphic

Fig. 7

 

To take advantage of the detailed graphics and other features, select the Help icon from the Service Information home page menu and click TIFF and CGM Graphic Viewers (Download and Execute). (Fig. 8) Follow the on-screen instructions to install the image viewer plug-in.

 

F08 si viewer

Fig. 8

 

New computers will need to have both plugins downloaded. Otherwise, download only the CGM plugin to receive the new print features. The original CGM plugin does not need to be removed to install the newest version.

 

The updated viewer include a new toolbar with a Print button that allows users to print full-page graphics. (Fig. 9) The Print Preview button, next to the Print button, allows the graphic to be viewed before printing. In addition, the Page Setup button can be used to change the orientation of the image — portrait or landscape — or change the selected paper size.

 

F09 si toolbar image

Fig. 9

 

– Thanks to Lisa Scott

Do Not Install Windows 10 Upgrade

Microsoft recently announced that Windows 10 will be available on July 29, 2015. In addition, Microsoft is offering free upgrades for one year for Windows 7 and 8 users.

 

Microsoft pushed an icon to the desktop tray of users eligible for the upgrade. Opening the icon presents a screen with information about the upgrade process. (Fig. 10) Do not click the button on this screen to “Reserve your free upgrade.” If you have already reserved your upgrade, cancel it.

 

F10 win upgrade screen

Fig. 10

 

Installing Windows 10 will make the Techline applications unusable and prevent technicians from diagnosing and repairing vehicles. Current Techline applications, including TIS2Web, GDS 2, MDI/MDI Manager and Tech2Win, are not compatible with Windows 10. The conversion back to Windows 7 can take several hours and will not be supported by the Techline Customer Support Center.

 

When will GM Techline be ready for Windows 10? The changes needed to become compatible are under evaluation. Currently, the target is mid-year 2016.

 

– Thanks to Lisa Scott

C-Pillar Area Water Leak

Some 2015 Tahoe, Suburban, Yukon models and Escalade models may have wet carpet in the C-pillar area. The second row outboard seat belt also may be wet or have gotten wet.

 

To correct the water leak condition, there are three areas (Fig. 11) of body seam sealer (Fig. 12) that need to be addressed. The luggage carrier roof side rail on the affected side will need to be removed (with the pillar trim being repositioned and the headliner partially lowered for rail access).

 

F11 4178679

Fig. 11

 

F12 4178680

Fig. 12

 

On the affected side, reposition the C-pillar/body lock pillar upper trim panel and partially release the forward portion of the cargo area/quarter lower rear trim panel to allow for inspection of the second-row outboard seat belt webbing and retractor. Inspect for water stains on the retractor and webbing and on the sheet metal near the retractor.

 

TIP: If an outboard seat belt is determined to have become wet at any time, the seat belt retractor assembly must be replaced. Do not replace the seat belt retractor assembly until the water leak repair has been performed.

 

Area 1

 

With the quarter panel weather strip removed, inspect for clear seam sealer between the C-pillar and rear quarter panel. If seam sealer is not present or if any gaps are found in the sealer, apply clear flowable seam sealer between the C-pillar and rear quarter panel sheet metal. (Fig. 13)

 

F13 4179860

Fig. 13

 

Area 2

 

With the roof rail removed on the affected side, inspect the existing seam sealer in the door surround to quarter panel and roof panel for skips or pin holes. (Fig. 14) Fill any voids or pin holes found in the existing seam sealer with clear flowable seam sealer.

 

F14 4178685

Fig. 14

 

Area 3

 

With the roof rail removed on the affected side, inspect the existing seam sealer in the quarter panel to roof panel for skips or pull-away along the outboard edge. (Fig. 15) Apply clear flowable seam sealer along the rear quarter panel to roof seam.

 

F15 4115547

Fig. 15

 

Test to ensure the water leak has been repaired in all areas. If the seat belt retractor requires replacement, replace the retractor and then reinstall the interior trim.

 

– Thanks to Kacy McCure

HVAC Blows Only from Vents

The HVAC system on some 2015 Colorado and Canyon models may not switch to the floor mode. When the floor mode is selected, the HVAC system will typically direct airflow to a blend of the defrost and dash vents.

 

To repair this condition, align the mode door levers to the mode control cam. Refer to the appropriate Service Information procedure for Mode Control Cam Replacement. For proper alignment of the mode control cam, the levers and the link studs should align with the round windows on the cam. (Fig. 16) Do not replace the mode control cam unless damage is found.

 

F16 mode cam r

Fig. 16

 

– Thanks to Ken Cole

Trunk Does Not Open

The trunk may not open when using the Remote Keyless Entry transmitter (key fob), trunk touchpad or inside release button on the driver’s door panel on some 2014-2015 CTS Sedan and 2015 ATS Coupe models. When trying to open the trunk, a low volume audible click may be heard. This condition may be caused by the Emergency Trunk Release (ETR) handle being moved out of position by items stored in the trunk. To open the trunk if this condition is present, enter the trunk through the rear seat access and pull the ETR handle.

 

If the ETR handle bezel is positioned incorrectly where it comes through the opening in the deck lid liner, check the orientation of the tabs on the bezel. All three tabs should be visible inside the trunk. (Fig. 17)

 

F17 4204110

Fig. 17

 

The position of the handle should be flat when the bezel is properly snapped into position. (Fig. 18)

 

F18 4204111

Fig. 18

 

Any sort of preload on the ETR cable will not allow the latch to release when any of the electric switches are used. The handle must be physically pushed up and snapped into the bezel if it is out of position. (Fig. 19)

 

F19 4204112

Fig. 19

 

– Thanks to Christopher Crumb

Unable to Change HVAC Mode

On some 2012-2015 Express and Savana vans, it may be difficult to change the HVAC mode or select the Defrost or Recirculation position.

 

These vehicles use vacuum actuators to operate the HVAC mode, defrost and recirculation doors. Check for a pinched or restricted vacuum line (Fig. 20) from the HVAC control head to the affected actuator. Most issues are located near the HVAC control head.

 

F20 4166802

Fig. 20

 

– Thanks to Scott Fibranz

Service Know-How

10215.07D – Emerging Issues

July 9, 2015

 

To view Emerging Issues seminars:

• Log in to www.centerlearning.com

–   Select Resources > Service Know-How/TECHAssist > Emerging Issues > Searchable Streaming Video; or

–   Select Catalog to search for the course number, and then select View > Take or Continue Course

 

 

 

 

Service Technical College – New Training Courses

 

Following are the latest service technical courses available to technicians through the GM Service Technical College.

 

For more information about available service training courses, log in to the GM Center of Learning at www.centerlearning.com and click the Catalog link. Use the drop-down menus to search for courses by delivery type, audience, and category.

Screen Shot 2015-07-09 at 11.43.39 AM

Bulletin Review – June 2014

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Screen Shot 2015-07-09 at 11.41.29 AM

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