Archive for June 2017

Top Questions on New Models

Many new GM models have a number of innovative features that enhance the safety and convenience of the vehicle. But some of these features may be unfamiliar to customers and, as a result, they may bring their vehicle into the dealership for service when a system is actually operating as designed. Following are some of the top customer questions regarding new technology, safety and infotainment systems on some 2016-2018 GM models. Ensure customers understand the operation of these features before beginning any diagnosis or repairs.




The programmable power liftgate (Fig 1) can be set to open to a lower height in order to make it easier to reach the liftgate to close, or to prevent contact with a low ceiling, garage door, or roof-mounted cargo.


Fig. 1


Programming the Liftgate Height


The power liftgate knob is usually located on the driver’s door (Fig. 2) or the overhead console. It has three modes:


MAX: Opens the liftgate to the maximum height.

3/4: Opens to a reduced height that can be set from 3/4 open to fully open.

Off: Opens manually only.


Fig. 2


To program the liftgate’s opening height:

  1. Turn the power liftgate knob to the MAX or 3/4 position.
  2. Open the liftgate and adjust it manually to the desired height.
  3. Save the height setting by pressing and holding the power liftgate close button next to the latch on the liftgate for three seconds. The turn signals will flash and a beep will sound when the setting is saved.


With the liftgate programmed, it will open to the set height if the power liftgate knob is in the 3/4 mode.


Hands-Free Operation


If the liftgate is equipped with hands-free operation, the liftgate can be opened or closed by using a kicking motion under the rear bumper. The location of the rear bumper sensor varies based on the vehicle. Do not swing your foot side-to-side. The key fob must be within 3 feet (1 meter) of the liftgate.


Some 2018 models also feature a vehicle logo that is projected onto the ground under the rear bumper sensor that indicates where the kicking motion should take place. (Fig. 3) The logo is projected when the key fob is detected within 6 feet (2 meters) of the liftgate. Based on operating conditions, the logo will be projected for one minute.


Fig. 3




The customer may be expecting a warning chime when the Lane Keep Assist with Lane Departure Warning system is active. However, there is not a warning chime if the system determines the driver is actively steering.


The Lane Keep Assist system can be turned on/off using the button located on the steering wheel, center console (Fig. 4) or instrument panel. Make sure the customer has not inadvertently turned the system off.


Fig. 4


Lane Keep Assist Function


Lane Keep Assist will provide steering input to gently turn the steering wheel to help center the vehicle in the traffic lane if the vehicle approaches a detected lane marking without using a turn signal in that direction. (Fig. 5) The Lane Keep Assist icon is green on the instrument cluster if the system is available to assist and turns amber when the system is providing steering input. As the driver actively steers the vehicle, the steering input and amber indicator may not be noticed.


Fig. 5


Lane Departure Warning Function


If the driver does not actively steer the vehicle and crosses the lane marking without using a turn signal in that direction, the Lane Departure Warning will then provide a warning by flashing the amber icon and pulse the Safety Alert Seat or sound a chime/beeps. Audible beeps or seat pulsing alerts may be selected in the Settings menu.




Many GM models now feature Auto Engine Stop/Start technology to help conserve fuel and provide better fuel economy. The Auto Engine Stop//Start system shuts down the engine when the vehicle comes to a complete stop, referred to as an Auto Stop, if operating conditions are met. When in Auto Stop mode, the tachometer will read AUTO STOP. The audio system, climate controls and other accessories will continue to operate. By releasing the brake pedal or applying the accelerator pedal, the engine will restart.


When the engine is turned off using the ignition pushbutton, the tachometer will read OFF. (Fig. 6)


Fig. 6


The Auto Engine Stop/Start system can be turned off using a control button on some GM models. (Fig. 7)


Fig. 7


Operating Conditions


The engine may not turn off at a stop or may restart if any of the following conditions apply:

  • A minimum vehicle speed is not reached.
  • The engine or transmission is not at the required operating temperature.
  • The outside temperature is not in the required operating range.
  • The shift lever is in any gear other than Drive (D).
  • The battery charge is low.
  • The climate control system requires the engine to run based on the climate control or defog setting.
  • The Auto Stop time is greater than two minutes.




The new touchscreen infotainment systems (Fig. 8) offer a variety of entertainment, communication and vehicle system options. Simple gestures can be used on many of the touchscreen systems just as on a tablet, such as tap, drag, swipe and pinch/spread. Touching an application icon or screen button accesses that feature, menu or setting.


Fig. 8


Customers can use a Bluetooth or USB connection to link to a compatible smartphone, cell phone, USB flash drive, or portable audio player.


Detailed information and Frequently Asked Questions on how to use a variety of system functions are covered at the following websites:

Buick IntelliLink Radio Guide

Chevrolet Mylink Vehicle Technology

GMC IntelliLink Infotainment System

In Canada, visit or




In addition, helpful videos and more information about the operation of many features on new GM models can be found at the following GM owner websites: (Canada)


Choose your vehicle using the drop-down menus and select Learn About Your Vehicle.


– Thanks to Tyler Greenhill



Loss of Communication while Viewing HMI Data List

While performing service procedures involving the Human Machine Interface (HMI) module, viewing the HMI data parameters using GDS2 may cause a temporary loss of communication with the scan tool. This condition may be found on 2016 ELR; 2016-2017 ATS, CTS, XTS; 2016-2018 Encore, Envision, LaCrosse, Regal, CT6, Escalade, Camaro, Colorado, Corvette, Impala, Malibu, Silverado, Suburban, Tahoe, Canyon, Sierra; 2017-2018 XT5, Acadia; and 2018 Equinox models equipped with RPOs IO5, IO6, RAO, or UY4.


On some vehicles, viewing the HMI data parameters (Fig. 9) for as little as 5–60 seconds using GDS2 may induce a temporary loss of HMI communication with the scan tool. This condition may occur on a vehicle that has no concerns as well as a vehicle that has an unrelated customer concern. If a loss of HMI communication occurs with no other conditions, do not replace the HMI module.


Fig. 9


Power Cycle the HMI Module


Communication can sometimes be re-established with GDS2 by simply clicking OK when the “No HMI Communication” screen is displayed. In some other cases, it may be necessary to remove the HMI fuse for a few seconds and then reinstall the fuse to re-establish HMI communication. If there are not any related DTCs set or other concerns with the HMI, the HMI data parameters should be temporarily viewable again (for only one minute or less) after reinstalling the HMI fuse, before the cycle starts again.


If the loss of HMI communication with GDS2 occurs and TIS2Web is used to program the HMI module without first restoring communication with the HMI module by power cycling it (cycling the fuse for a few seconds or cancelling Retained Accessory Power), an E-4491 SPS error code may appear. However, the HMI module should not be damaged and it should be possible to continue with programming by power cycling the HMI module and then immediately entering TIS2Web.


The loss of HMI communication while viewing the HMI data parameters using GDS2 is due to a software issue that causes the HMI to the prematurely leave the diagnostic/service mode and return to normal operation.


Do not replace the HMI module or any other parts if this condition is found. GM Engineering is currently evaluating this condition. In the meantime, power cycling the HMI fuse should restore communication unless another issue exists that requires further diagnosis and repair.


– Thanks to Ryan Dorland

Hard Shifting into 1st Gear or Reverse

Hard shifting conditions when shifting into 1st gear or Reverse may be found on some 2014-2018 Silverado, Sierra and Corvette models equipped the 4.3L V6 engine, 5.3L V8 engine or 6.2L V8 engine (RPOs LV3, L83, L86, LT4) and 2015-2018 CTS-V, Escalade, Tahoe, Suburban, Yukon; and 2016-2018 Camaro models equipped with the 5.3L V8 or 6.2L V8 engine (RPOs L83, L86, LT4).


On Silverado, Sierra, CTS-V, Escalade, Tahoe, Suburban, Yukon, and Camaro models, when shifting the automatic transmission into Drive or Reverse, a clunk sound may be heard.


On Corvette models only, it may be difficult to shift into 1st gear or Reverse with a manual transmission or there may be a vibration on takeoff or a clunk noise when shifting into Drive or Reverse with an automatic transmission.


Crankshaft End Play


The hard shifting conditions may require replacement of the crankshaft or thrust bearing. Before replacing any components, check for excessive crankshaft end play. Crankshaft end play clearance should be within a specification of 0.0015–0.0086 in. (0.040–0.220 mm).


Crankshaft Wear


If end play is found to be out of specification, remove the engine and check for possible crankshaft thrust bearing or crankshaft wear. The crankshaft and bearings should not show signs of excessive wear. (Fig. 10) Inspect the thrust bearing for wear on one side and the crankshaft on the mating surface.


Fig. 10


If wear is evident — the three vertical channels may be worn off — replace the connecting rods, main bearings, thrust bearing and crankshaft.


TIP: On engines with a dry sump oil system, the oil tank and lines, and the oil cooler (if equipped) (Fig. 11), should be replaced when repairing the engine.


Fig. 11


– Thanks to Richard Renshaw


Diagnostic Tips for Harsh Shifting Transmission Conditions

Harsh shifting conditions and delayed garage shift engagements may be noticed on some 2017 Colorado, Canyon, Express, Savana; 2016-2017 ATS, CT6, CTS, Camaro; 2015-2017 Escalade, Silverado, Sierra, Yukon Denali, and Corvette models equipped with the 8L45 or 8L90 automatic transmission (RPOs M5N, M5T, M5U, M5X). (Fig. 12) The harsh shift conditions may be caused by one or more clutch fill times not completely learned in the Transmission Control Module (TCM).


Fig. 12


DTCs and Updated Calibrations


As a starting point for diagnosing all 8L45/8L90 transmission shift conditions, check for DTCs in all modules and address the causes for setting the DTCs. Also check for any available ECM/TCM calibration updates.


Refer to the following bulletins for additional information:

  • 16-NA-411 – 2015-2016 models equipped with the 6.2L engine (RPO L86) engine and the 8L90 transmission
  • 16-NA-412 – 2015-2016 models equipped with the 5.3L engine (RPO L83) engine and the 8L90 transmission
  • 16-NA-404 – 2017 models


Test Drive with GDS2


A test drive of the vehicle should be completed in order to attempt to duplicate the concern. Use GDS2 to capture a session log of the event and bookmark when the shift concern is identified. Review the GDS2 session log to identify which shift(s) are occurring at each bookmark.


Refer to the following bulletins for additional information:

  • 14-07-30-001: Information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares – 2015 Corvette
  • 16-NA-411, 16-NA-412 and 16-NA-019: Updating ECM/TCM Calibrations – 2015 models other than Corvette
  • 16-NA-019: Information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares – 2016-2017 models


These bulletins are based on the following criteria:

  • 2015 models with 7,500 miles (12,000 km) or less since the vehicle in-service date, TCM calibration update or the Service Fast Learn (SFL) procedure being performed
  • 2016 models with 5,000 miles (8,000 km) or less since the vehicle in-service date, TCM calibration update or the SFL procedure being performed
  • 2017 models with 2,500 miles (4,000 km) or less since the vehicle in-service date, TCM calibration update or the SFL procedure being performed


Transmission, valve body or TCM replacement requires a Service Fast Learn procedure using a scan tool to be performed in order for the TCM to learn individual clutch apply pressures. If the TCM calibration has been updated, a Service Fast Learn procedure is required on vehicles with any mileage accumulation.


Clutch Drive Learn Procedure


Based on the bookmarks placed in the GDS2 session, complete the Clutch Drive Learn procedure for the suspect clutch. The Clutch Drive Learn procedure should only be performed on smooth, level roads and may take 45 minutes or more.


Completion of the Service Fast Learn procedure will reset all shift adapts and may require the entire transmission Clutch Drive Learn procedure for each clutch to be completed.


After completing the procedure, the vehicle should be allowed to cool down for eight or more hours and then test driven again to ensure the cold shift quality is acceptable.


Refer to the following bulletins for more information:

  • 16-NA-361: Transmission Harsh 1-2 Shift Upon First Start Up/Shift of the Day Under Light Throttle
  • 16-NA-213: Diagnostic Tips for Harsh Shifts after Mileage Accumulation without Previous Transmission Repairs and/or Calibration Updates – Transmissions built between July 1, 2015 and September 14, 2015.


Garage Shifts


Refer to the following bulletins for more information:

  • 16-NA-014: Delayed Engagement After Sitting With Engine Off. Torque Converter Fluid Drain Back – 2015-2016 models
  • 16-NA-364: Delayed Engagement After Sitting With Engine Off, Clutch Slow to Fill – 2015-2017 models


– Thanks to Terry Neuendorf


Preventing an Inadvertent Remote Start during Service

With the growing popularity and availability of GM models equipped with remote start and the OnStar mobile app, it’s a good time for a reminder that there is potential for personal injury to technicians or damage to a vehicle during vehicle service if the remote start function isn’t disabled.


2009-2018 GM models may be equipped with remote start or the OnStar mobile app, which enables owners to send a remote start command to the vehicle using a smartphone. In a situation where a technician is working on a repair from underneath the vehicle — where the vehicle would be on a hoist and the hood closed — the vehicle could be inadvertently started using the remote start function or the mobile app remote command.


The inadvertent remote start may occur in a couple of common instances. The vehicle owner may start the vehicle using the OnStar mobile app (Fig. 13) out of habit, such as during lunchtime or at the end of the day, forgetting that the vehicle is being repaired. Another case could be if dealership personnel accidentally start the wrong vehicle using an incorrect key fob. The common appearance of key fobs could create a situation where the wrong fob is used, leading to an accidental engine start-up.


Fig. 13


Always Open the Hood


When performing repairs in the engine compartment or under the vehicle, always fully open the hood (Fig. 14), or open the hood to its secondary latch, so that the remote start function will be disabled. Failure to fully open the hood, or open it to its secondary latch, during service could result in personal injury or damage to the vehicle if an inadvertent remote start occurs.


Fig. 14


Always pay attention to the Dangers, Warnings and Cautions in the appropriate Service Information when performing repairs. The remote start warning also is included under Hoist Procedures as well as the general warning statement presented when logging into the Service Information.


– Thanks to Matt Bunting

The All-New 2018 Chevrolet Traverse

The all-new 2018 Traverse (Fig. 1) features a bold design, seating for up to eight passengers, and new technologies in six trim levels: LS, LT, RS, Premier, Redline, and High Country.


Fig. 1


A new 3.6L V6 engine (RPO LFY) is available on front-wheel drive (FWD) and all-wheel drive (AWD) models. The new RS model, which is FWD only, features a 2.0L turbocharged 4-cylinder engine (RPO LTG). All models have standard Intelligent Stop/Start technology to help conserve fuel. Both engines are paired with the 9T65 9-speed automatic transmission (RPO M3V) that offers smoother shifting and improved fuel economy.


The High Country model (Fig. 2) also is equipped with the Twin Clutch AWD system (RPO G99), which independently controls torque to each rear wheel, providing superior control with less brake intervention. The advanced AWD system is automatic and always engaged when AWD mode is selected using the Driver Mode Control on the center console. The LS, LT, Premier and Redline AWD models are equipped with single-clutch AWD.


Fig. 2


The design of the new Traverse includes an overall weight reduction of approximately 362 lbs. (164 kg) from the previous model when equipped with the 2.0L engine. The weight reduction comes mostly from the use of thinner-gauge high-strength steels.


3.6L V6 Engine


The 3.6L V6 engine (Fig. 3) features variable valve timing (VVT) and direct injection (DI) and generates an estimated 305 horsepower and 260 lb.-ft. of torque. The DI system places the high pressure injectors in the cylinder heads. The engine has E85-compatible valves and seats with special materials and coatings that require slightly different service procedures from gasoline valves. Gasoline with an octane rating of 87 or higher is recommended.


Fig. 3


The cylinder block is constructed of aluminum alloy by precision sand-casting with cast-in-place iron cylinder liners. The cylinder heads are cast aluminum with powdered metal valve seat inserts and valve guides. The cylinder heads also feature integrated exhaust manifolds. Which incorporate the exhaust manifolds into the head casting. The engine uses ACDelco dexos1 SAE 5W-30 viscosity grade engine oil.


2.0L 4-Cylinder Engine


The 2.0L turbocharged 4-cylinder DOHC engine (Fig. 4) is based on a generation of large displacement four cylinder engines designed for greater efficiency. It produces 255 horsepower and 295 lb.-ft. of torque.


Fig. 4


The engine features a sand-cast aluminum cylinder block and aluminum cylinder heads. The direct injector mounting locations are below the ports. The two-stage variable displacement oil pump helps maximize fuel efficiency by matching oil supply to engine load. The engine uses ACDelco dexos1 SAE 5W-30 viscosity grade engine oil.


The turbocharger generates up to 20 pounds (138 kPa) of boost and its twin- scroll design helps optimize the usable power from the engine. Electronically controlled turbocharger supporting components, including the wastegate and bypass valve, help optimize performance and efficiency. The turbocharger intake system is supported by an air-to-air charge air cooler system.


Premium gasoline with an octane rating of 93 is recommended for best engine performance and fuel economy.


Intelligent Stop/Start


The Intelligent Stop/Start system, which turns off the engine when at a stop in certain conditions to reduce fuel consumption and emissions, is standard on both engines. It’s similar to the Stop/Start systems found on other GM models, but it offers quieter engine stops/starts with fewer vibrations and can recognize certain driving maneuvers, such as backing into a garage or parking lot situations. An advanced algorithm determines when driving conditions are optimal for engine shut-off. The engine automatically restarts after approximately two minutes if the driver hasn’t removed their foot from the brake pedal.


The system features a tandem-solenoid starter, a unique DC-DC module that maintains voltage during a stop/start event, an electronically controlled accumulator that retains the transmission fluid pressure to keep the clutches engaged for immediate takeoff when the brake pedal is released, and an engine mount system that dampens the vibrations associated with a restart.


9T65 Automatic Transmission


The 9T65 automatic transmission is transverse mounted and features a 4-element torque converter, a compound planetary gear set, friction and mechanical clutch assemblies, and a hydraulic pressurization and control system.


The planetary gear sets provide the 9 forward gear ratios and reverse. The Transmission Control Module (TCM) receives and monitors various electronic sensor inputs to shift the transmission at the optimum time. Use DEXRON-VI transmission fluid in the 9T65 transmission.


Twin Clutch AWD


The Twin Clutch AWD system delivers greater handling and stability by preemptively and electronically splitting the torque as needed between the rear wheels using twin clutches to provide added traction, stability and control versus a 50/50 split in a single clutch system.


The Twin Clutch system with active torque bias has increased capability to add stability across all driving conditions, including when one side of the vehicle is on a slippery surface and the other side has more traction. In addition, a fuel economy benefit is realized by not pushing torque when it is not needed.


Traction Select System


The Traction Select system adjusts the vehicle’s throttle response, shift mapping and stability control to maximize performance in varying road conditions based on the mode selected. The different driving modes are selected using the Driver Mode Control on the center console. (Fig. 5) If equipped with FWD, the Driver Mode Control may have the following mode selections: FWD, Snow, and Tow/Haul. If equipped with AWD, the Driver Mode Control may have Two-Wheel Drive (2WD), AWD, Off-Road, and Tow/Haul.


Fig. 5


On AWD models, the driver can switch between FWD and AWD operation when conditions dictate without having to stop the vehicle. The AWD Mode will stay selected until the mode is changed. If the customer switches to FWD, the system efficiently disconnects virtually all of the AWD components from the drivetrain so the gears and prop shafts stop spinning, saving fuel and reducing emissions.


Braking Systems


All models have four-wheel disc brakes with Duralife brake rotors and an electric parking brake. The Electronic Brake Control Module (EBCM) and the brake pressure modulator are serviced separately.


Depending on how the vehicle is equipped, performance enhancement systems may include Antilock Brakes, Dynamic Rear Proportioning, Hill Hold Start Assist, Intelligent Brake Assist, Traction Control and Electronic Stability Control, Trailer Brake Control, and Trailer Sway Control.


Infotainment Systems


The Traverse is equipped with Chevrolet MyLink, which offers Apple CarPlay and Android Auto compatibility, and either a standard 7-inch (179 mm) diagonal touch screen (RPO IOA) or an available 8-inch (203 mm) diagonal touch screen (RPO IO5) with optional embedded navigation (RPO IO6).


The 8-inch touch screen features gesture recognition control that lets drivers use their fingertips to navigate around screens by clicking, dragging and swiping, similar to the gestures used on a tablet. The 8-inch touch screen also raises to reveal a hidden storage compartment behind the screen. (Fig. 6)


Fig. 6


Automatic Climate Control


The Traverse features a standard tri-zone automatic climate control system with two zones in the front row and one zone in the second row. Controls are on the instrument panel and on the rear of the front row console. The second-row settings can be controlled using the infotainment touch screen. The system uses R-1234yf refrigerant. A new brushless blower motor helps eliminate the humming sounds an HVAC system can create, providing a quieter cabin.


Hands-Free Power Liftgate


The programmable power liftgate has an available hands-free functionality that enables the liftgate to be opened or closed by using a kicking motion under the rear bumper. An optional projected Chevrolet bowtie indicates the kick location, which is under the left side of the bumper. (Fig. 7) Certain conditions must be met in order for the projection to appear.


Fig. 7


TAC Action Center (U.S.)


The GM Technical Assistance Center (TAC) has established an Action Center for the 2018 Traverse. TAC Action Centers are designed to gather early feedback and provide support for the introduction of new GM models. Dealership service departments are asked to report all vehicle issues that require immediate attention, not just concerns that require technical assistance. The goal is to develop a quick resolution to any product concerns, such as fit and finish, performance, and operation.


Action Centers have a direct connection to GM Engineering, Brand Quality and the assembly plant, which offer combined resources to immediately address product concerns seen in the dealership. Product concerns and repairs reported by technicians to the Technical Assistance Center is critical to helping ensure a successful model launch.


To contact the Traverse Action Center, call TAC and follow the prompts to:

  1. Select Speak with a Consultant for Vehicle Diagnostics
  2. Enter BAC Code
  3. Select Action Centers
  4. Select Traverse Action Center


In Canada, dealerships should follow the usual process when contacting TAC.


For more information on the new 2018 Traverse, refer to Bulletin #17-NA-176.


– Thanks to Sherman Dixon and Steve Bruder





New GM Dealer Infrastructure Guidelines Adopt Good, Better, Best Format

GM has released new Dealership Infrastructure Guidelines (DIG) and introduced a new document, Dealership Security Guidelines (DSG). The Dealership Infrastructure Guidelines are updated periodically to stay current with technology that should be in place at the dealership, including Personal Computer (PC) and network hardware, software, wireless networking, digital signage, Information Technology (IT) continuity management, internet optimization and data network security. These guidelines provide the specifications necessary to run GM applications efficiently and securely in the dealership.


GM created the Dealership Security Guidelines to assist dealerships with implementing security processes for effective data security controls.


The new guidelines (Fig. 8) are available on the GM Dealer Services website. On the website, select each link to download and save the DIG and DSG. In Canada, the IT guidelines are located within GlobalConnect under SUPPORT.


Fig. 8


New Format


The Dealership Infrastructure Guidelines feature a new format that provides Good, Better, and Best specifications (Fig. 9) for running GM Techline service applications (TIS2Web, GDS 2, MDI, MDI 2, Tech2Win, and Service Information).


Good – the minimum acceptable systems capability/components for conducting business with GM.


Better – the systems capability/components that will deliver better performance and security.


Best – the systems capability/components that will provide the best performance and security while maximizing the lifecycle of the investment.


Fig. 9


GM estimates the average life cycle of a desktop, laptop or tablet PC to be approximately three years. When purchasing a new PC or laptop, it’s recommended to follow the specifications from the Best category. The software used in the service department to diagnose and repair GM vehicles requires the most computing power to perform efficiently as well as to meet future demands.


Most computer manufacturer’s offer consumer-grade hardware intended for home/personal use and enterprise-grade hardware intended for businesses. While consumer-grade hardware may seem attractive based on price, the total cost of ownership often ends up being greater due to the limited functionality, higher failure rates, and more complex support necessary.


TIP: Where the device will be used should be considered when purchasing a laptop or tablet PC. If the device will be used in the service department, a rugged case design is recommended.


Dealership Support


Starting September 1, 2017, the Techline Customer Support Center (TCSC) will ask each caller to provide the specification of the Techline PC regardless of call type. If the PC is below the minimum specification, the caller will not receive support.


For service or parts department PC questions related to the Dealership Infrastructure Guidelines, contact the TCSC at 1-800-828-6860. For questions related to the Dealership Security Guidelines, contact GMDIT at 1-888-337-1010. In Canada, for questions related to Service Department PCs or Service Technician apps, contact TCSC at 1-800-828-6860 (English) or 1-800-503-3222 (French). For questions related to the GM Infrastructure Guidelines, contact Canadian Dealer Systems Support at 1-800-265-0573.


– Thanks to Lisa Scott


DC Fast Charger for EV Charging

The amount of time it takes to fully charge the 2017 Bolt EV with a depleted high voltage battery depends on the type of charger being used. With the 120-volt portable charge cord at the default 8-amp setting, it takes over 50 hours to fully charge the vehicle. Using a 240-volt charging station set at a 16-amp level, the charging time is reduced to approximately 19 hours. But using a DC Fast Charging station on vehicles with the available Fast Charge port, the charging time to achieve 90 EV miles (145 km) is reduced to only about 30 minutes. This fast charge rate makes it more convenient for dealerships to keep Bolt EV models in inventory charged or to quickly recharge a vehicle visiting the dealership. Individual charging times and rates will vary depending on outside temperature and remaining charge.


The EL-52240C DC Fast Charger (Fig. 10) was recently shipped to all Bolt EV-authorized Chevrolet dealerships. The DC Fast Charger can be used on Bolt EV and Spark EV models equipped with the available DC Combo charging port connector.


Fig. 10


EL-52240C DC Fast Charger


The 25kW DC Fast Charger is weatherproof and lightweight, so it can be installed indoors or outside on a wall or on a pedestal. It features an easy-to-use interface with two simple function buttons.


The DC Fast Charger requires a single phase connection that can support 165A continuous current. Installation should only be performed by a licensed electrician.


Two keys are provided that are used to turn off the DC Fast Charger when not in use or after hours. Turn the key to turn the power on or off. Two optional access cards also can be used to restrict access to authorized users only.


A Configuration Tool is available at that offers advanced configuration options, such as maximum charging time and power limits.


Accessories that are available with the DC Fast Charger include a wall-mounted cable dock (EL-52240-DOCK) that holds the cable and vehicle coupler and a pedestal mount (EL-52240-GNT) that allows the DC Fast Charger to be installed in an open area. (Fig. 11)


Fig. 11


DC Charging


The available SAE J1772 DC Combo charging port (Fig. 12) feeds power directly to the vehicle’s battery to significantly reduce the charging time, which will vary based on outside temperature. The combo charging port is an optional feature (standard in Canada). If the vehicle is not equipped with this charging port, it is not compatible with DC charging.


Fig. 12


The DC Fast Charger will quickly charge a depleted battery to approximately 90% state of charge in about two hours. It will continue to charge the vehicle to 100%, but at a slower rate.


To charge the Bolt EV, unlatch the DC charging dust cover on the charge port in order to plug in the charge cord. Follow the steps on the DC Fast Charger to start charging. The DC plug will be locked and cannot be disconnected while charging is active. The Charge Status indictor on top of the vehicle’s instrument panel, near the windshield, will illuminate green and the horn will chirp when properly connected.


To stop charging at any time, use the controls on the DC Fast Charger or touch the Stop button on the vehicle’s Battery information screen.


– Thanks to Chuck Berecz




Turning On the Wi-Fi Hotspot

The Wi-Fi hotspot may not appear to be working on some 2018 Sonic, Trax, and Terrain models equipped with infotainment system RPO IOR (3.X Low HMI, Midlevel Connectivity 3.X).


On infotainment system RPO IOR, there are two settings that must be turned on in order for the Wi-Fi hotspot to be enabled as well as to share data with a connected device. Owners may have turned on the Wi-Fi hotspot without activating the sharing data function.


From the infotainment system Home screen, go to Settings > System > Wi-Fi Hotspot. (Fig. 13)


Fig. 13


Select Wi-Fi Services under the Wi-Fi Hotspot menu to turn on the Wi-Fi hotspot. The On indicator will be green when the setting is turned on. (Fig. 14)


Fig. 14


Scroll down in the Wi-Fi- Hotspot menu to select Share Hotspot Data to activate the sharing data function. The On indicator will be green when the setting is turned on. (Fig. 15)


Fig. 15


Check that both of these settings are turned on if there is a concern regarding the functionality of the Wi-Fi hotspot before pursuing additional diagnostics or repairs.


– Thanks to Ed Flanagan

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