09102D - Battery Charge Reading Incorrect - Reprogram Module (09102D)

Publication date: 2009-10-08
Reference number: 09102D
Supersedes refnos: 09102, 09102A, 09102B, 09102C

09102D - Battery Charge Reading Incorrect - Reprogram Module

SERVICE CAMPAIGN BULLETIN

Reference Number(s): 09102D, Date of Issue: October 08, 2009

Affected Model(s):	2009 Cadillac Escalade; 2008-2009 Chevrolet Tahoe; 2009 Chevrolet Silverado; 2008-2009 GMC Yukon; 2009 GMC Sierra; Two-Mode Hybrid
Supercedes:	The service procedure in this bulletin has been revised. If the vehicle has an SES lamp with a DTC P061B, refer to Service Information. Please discard all copies of bulletin 09102C, issued August 2009.

Superceded Bulletin(s): 09102C, Date of Issue: August 21, 2009

Condition

General Motors has decided to conduct a voluntary emission recall involving certain 2008-2009 model year Chevrolet Tahoe and GMC Yukon, and 2009 model year Cadillac Escalade, Chevrolet Silverado, and GMC Sierra two-mode hybrid vehicles. On these vehicles, the current battery voltage reading, which determines when the battery is charged, may be incorrect. This could cause a Service Engine Soon light to illuminate and the vehicle may shutdown at low speeds when the vehicle is attempting to transition from electric motor to gasoline engine mode. The vehicle can be immediately restarted; however, it will likely continue to shutdown until the voltage error is corrected or unless the vehicle is driven at higher speeds for a duration of approximately one hour.

Correction

Dealers are to reprogram hybrid-related modules.

Vehicles Involved

Involved are certain 2008-2009 model year Chevrolet Tahoe and GMC Yukon, and 2009 model year Cadillac Escalade, Chevrolet Silverado, and GMC Sierra two-mode hybrid vehicles built within these VIN breakpoints:

Vehicles Involved

Year	Division	Model	From	Through
2009	Cadillac	Escalade	9R100056	9R249038
2009	Chevrolet	Silverado	91103737	91133871
2009	Chevrolet	Silverado	9G194966	9G234917
2008	Chevrolet	Tahoe	8R117658	8R279199
2009	Chevrolet	Tahoe	9R100025	9R249064
2009	GMC	Sierra	91103750	91133918
2009	GMC	Sierra	9G171821	9G235011
2008	GMC	Yukon	8R117663	8R279162
2009	GMC	Yukon	9R100022	9R249955

IMPORTANT: Dealers are to confirm vehicle eligibility prior to beginning repairs by using the GM Vehicle Inquiry System (GMVIS). Not all vehicles within the above breakpoints may be involved.

For dealers with involved vehicles, a listing with involved vehicles containing the complete vehicle identification number, customer name, and address information has been prepared and will be provided through the applicable system listed below. Dealers will not have a report available if they have no involved vehicles currently assigned.

- US and Canadian dealers/retailers - GM GlobalConnect Recall Reports

- Export dealers - sent directly to dealers

The listing may contain customer names and addresses obtained from Motor Vehicle Registration Records. The use of such motor vehicle registration data for any purpose other than follow-up necessary to complete this recall is a violation of law in several states/provinces/countries. Accordingly, you are urged to limit the use of this report to the follow-up necessary to complete this recall.

Parts Information

No parts are required for this recall.

Service Procedure

NOTE: This campaign provides service information and a labor operation code for a sequential programming event, EBCM relearn procedure and road test. Repairs not related to this campaign should be submitted as a warranty claim using the appropriate labor operations code. If the vehicle has an SES lamp with a DTC P061B, refer to Service Information for diagnostic and repair instructions prior to proceeding with the campaign.

Perform the following hybrid charging procedure before reprogramming. Connect the Tech 2® to the vehicle to monitor the hybrid battery state of charge. Start the engine. Leave the vehicle in park with the hood open. Apply the throttle to maintain a range of engine RPM from 2600 to 2800 (approximately 16% throttle position), watch tachometer, battery SOC (from Tech 2®) and continue charging with your foot on the throttle until a minimum of 70% SOC is reached.

NOTE: This procedure typically lasts 10 minutes or less. If after 20 minutes the pack SOC has not approached 70%, please record pack temperature and call TAC for further information.

NOTE: The vehicle may exhibit different driving characteristics after reprogramming. The hybrid battery is correcting the SOC and may take some time for it to return to normal driving operation.

Do not attempt to order the calibration number from GMSPO. The calibration numbers required for this service procedure are programmed into control modules via a Multiple Diagnostic Interface (MDI) and TIS2WEB with the calibration update. Use TIS2WEB on or after 05/13/09 to obtain the calibration. If you cannot access the calibration, call the Techline Customer Support Center and it will be provided.

For step-by-step programming instructions, please refer to SI and the Techline Information System (TIS) terminal.

Verify that there is a battery charge of 12 to 16 volts. The battery must be able to maintain a charge during programming. Only use an approved Midtronic 165-PSC charger to maintain proper battery voltage during programming.
Perform sequential programming event. Refer to SI and Service Programming System (SPS) documentation for programming instructions, if required.
1. Connect the MDI to the vehicle. Use a wire connection with MDI for this programming event. DO NOT use the MDI wireless option.
2. Select J2534 MDI and Reprogram ECU from the Select Diagnostic Tool and Programming Process screen.
3. Select SEQ EBCM/HCP/ECM/TCM/BECM Sequential Programming from the Supported Controllers screen.
4. Follow the on-screen instructions.
Using the MDI, clear all DTCs if required.

After the EBCM has been reprogrammed, it will be necessary to perform the EBCM Relearn Procedure below.

EBCM Relearn Procedure

NOTE: The vehicle must be at least 32° F (-0° C) or warmer before performing the set up procedures below. Use a contact thermometer or an infrared temperature gun to measure the temperature of the EBCM.

Using the Tech 2® scan tool, perform the EBCM Relearn using the steps below:

Select Diagnostics.
Build the appropriate vehicle information.
Select Chassis.
Select if the vehicle is equipped with Magnetic Ride Control Suspension Package (RPO Z95).
Select Electronic Brake Control Module (EBCM).
Select Module Setup.
Select the EBCM Relearn.
The Tech 2® screen will have a soft key labeled "RESET". Press the Tech 2® soft key and the screen will read "*Procedure in Progress*" for 20-25 seconds.
1. The screen should read "Process Complete". If the Relearn fails, you need to clear all codes and repeat the entire EBCM Relearn Procedure.
2. At this point, the relearn is not completed; you need to WAIT an additional 50 seconds without depressing the brake pedal.
3. Clear all DTCs from the PCM and the EBCM.
4. Turn the ignition key to the "OFF" position. Open the driver's door and wait one minute before starting the vehicle. This will disable the retained accessory power allowing the High Speed GMLAN Serial Data Bus to go to sleep and write the data to the Electrically Erasable Programmable Read Only Memory (EEPROM) in the EBCM.
Start the vehicle and drive up to 32 km/h (20 mph), then perform a brake stop.
Park the vehicle and place the transmission in the PARK position.
Turn the ignition key to the "OFF" position for one minute.
Clear all codes from all of the modules.
Drive the vehicle again and perform another brake stop.
NOTE: If DTC C0561 is present, cycle the ignition key to the "OFF" position for one minute, then start the vehicle and clear the DTC while the vehicle is running.
Verify that the condition has been corrected and that all the codes have been cleared.
Drive the vehicle in autostop for a minimum of 10 consecutive seconds without braking or coasting to help with the SOC relearn.
CALIFORNIA, CONNECTICUT, MASSACHUSETTS, MAINE, OREGON, VERMONT, & WASHINGTON VEHICLES ONLY: Install a Recall Identification Label. Also, for California vehicles complete a "Proof of Correction" certificate upon recall completion.

Recall Identification Label - California, Connecticut, Massachusetts, Maine, Oregon, Vermont, & Washington Vehicles Only

Place a Recall Identification Label on each vehicle corrected in accordance with the instructions outlined in this Product Recall Bulletin. Each label provides a space to include the recall number and the five-digit dealer code of the dealer performing the recall service. This information may be inserted with a typewriter or a ballpoint pen.

Put the Recall Identification Label on a clean and dry surface of the radiator core support in an area that will be visible to people servicing the vehicle.

When installing the Recall Identification Label, be sure to pull the tab to allow adhesion of the clear protective covering. Additional Recall Identification Labels for US dealers can be obtained from Dealer Support Materials by ordering on the web from DWD Store, www.gmdealerworld.com, and then click on the DWD Store link. Request Item Number S-1015 when ordering.

Courtesy Transportation - For US and Canada

The General Motors Courtesy Transportation program is intended to minimize customer inconvenience when a vehicle requires a repair that is covered by the New Vehicle Limited Warranties. The availability of courtesy transportation to customers whose vehicles are within the warranty coverage period and involved in a product program is very important in maintaining customer satisfaction. Dealers are to ensure that these customers understand that shuttle service or some other form of courtesy transportation is available and will be provided at no charge. Dealers should refer to the General Motors Service Policies and Procedures Manual for Courtesy Transportation guidelines.

Claim Information

1. Submit a claim using the table below.

2. Courtesy Transporation - For dealers using WINS, submit using normal labor code; for dealers using GWM, submit as Net Item under the repair labor code.

Claim Information

Labor Operation	Description	Labor Time
V2095	Reprogram SEQ EBCM / HCP / ECM / TCM / BECM	1.0

Customer Notification - For US and Canada

General Motors will notify customers of this recall on their vehicle (see copy of customer letter included with this bulletin).

In order to ensure full protection under the emission warranty, and the right to participate in future recalls, the customer notification letter recommends that customers have their vehicles serviced as soon as possible. It also advises that failure to do so could legally be determined to be lack of proper maintenance. The vehicle may fail a state or local emission inspection test if the recall work is not completed.

Customer Notification - For Export

Letters will be sent to known owners of record located within areas covered by the US National Traffic and Motor Vehicle Safety Act. For owners outside these areas, dealers should notify customers using the attached sample letter.

Dealer Recall Responsibility

All unsold new vehicles in dealers' possession and subject to this recall must be held and inspected/repaired per the service procedure of this recall bulletin before customers take possession of these vehicles.

Dealers are to service all vehicles subject to this recall at no charge to customers, regardless of mileage, age of vehicle, or ownership, from this time forward.

Customers who have recently purchased vehicles sold from your vehicle inventory, and for which there is no customer information indicated on the dealer listing, are to be contacted by the dealer. Arrangements are to be made to make the required correction according to the instructions contained in this bulletin. A copy of the customer letter is provided in this bulletin for your use in contacting customers. Recall follow-up cards should not be used for this purpose, since the customer may not as yet have received the notification letter.

In summary, whenever a vehicle subject to this recall enters your vehicle inventory, or is in your dealership for service in the future, you must take the steps necessary to be sure the recall correction has been made before selling or releasing the vehicle.

***THE FOLLOWING 2 PARAGRAPHS ARE NOT FOR CANADA OR EXPORT***

When a California emissions recall is completed by a GM dealer, the dealer must provide the vehicle owner a "Proof of Correction Certificate" which the owner may need to present to the California Department Of Motor Vehicles (DMV) when renewing their vehicle registration. Without this correction certificate, the owner may be unable to renew their vehicle registration.

Additional Certificates can be obtained, at no charge, from Dealer Support Materials by ordering on the web from the DWD Store, www.gmdealerworld.com, and then click on the DWD Store link. Request GM Item Number 1825 when ordering.

OWNER LETTER

June 2009

Dear General Motors Customer:

This notice is sent to inform you that General Motors is conducting an emission recall that includes your vehicle.

Reason For This Recall:

On your 2008 or 2009 model year Chevrolet Tahoe or GMC Yukon, or 2009 model year Cadillac Escalade, Chevrolet Silverado, or GMC Sierra two-mode hybrid vehicle, the current battery voltage reading, which determines when the battery is charged, may be incorrect. This could cause a Service Engine Soon light to illuminate and the vehicle may shutdown at low speeds when the vehicle is attempting to transition from electric mode to gasoline engine mode. The vehicle can be restarted; however, it will likely continue to shutdown until the voltage error is corrected.

What Will Be Done:

Your GM dealer will reprogram hybrid-related modules. This service will be performed for you at no charge .

How Long Will The Repair Take?

Because of service scheduling requirements, it is likely that your dealer will need your vehicle longer than the actual service correction time of approximately 25 minutes. What You Should Do: Please contact your GM dealer as soon as possible to arrange a service date. Instructions for making this correction have been sent to your dealer. Please ask your dealer if you wish to know how much time will be needed to schedule, process and repair your vehicle.

If you have any questions or need any assistance, just contact your dealer or the appropriate Customer Assistance Center at the number listed below.

Dealer Recall Responsibility

Division	Number	Text Telephones (TTY)
Cadillac	1-866-982-2339	1-800-833-2622
Chevrolet	1-800-630-2438	1-800-833-2438
GMC	1-866-996-9463	1-800-462-8583
Guam	1-671-648-8450
Puerto Rico - English	1-800-496-9992
Puerto Rico - Espanol	1-800-496-9993
Virgin Islands	1-800-496-9994

Courtesy Transportation:

If your vehicle is within the New Vehicle Limited Warranty, your dealer may provide you with shuttle service or some other form of courtesy transportation while your vehicle is at the dealership for this repair. Please refer to your Owner's Manual and your dealer for details on Courtesy Transportation.

Emission Law Information:

In order to ensure your full protection under the emission warranty made applicable to your 2008 or 2009 model year Chevrolet Tahoe or GMC Yukon, or 2009 model year Cadillac Escalade, Chevrolet Silverado, or GMC Sierra two-mode hybrid vehicle by Federal Law, and your right to participate in future recalls, it is recommended that you have your vehicle serviced as soon as possible. Failure to do so could legally be determined to be lack of proper maintenance of your vehicle. Also, your vehicle may fail a state or local emission inspection if this recall is not accomplished.

IMPORTANT MESSAGE FOR CALIFORNIA RESIDENTS

The California Air Resources Board (CARB) requires vehicle emission recalls be completed prior to California registration renewal. Uncorrected emission recalls will result in the inability to renew your California vehicle registration.

At the time of emission recall completion, your California dealer will issue a "Proof of Correction Certificate". Keep this certificate and, if required, present it to the Department of Motor Vehicles when renewing your California registration as proof of recall completion.

We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your continued satisfaction with our products.

Scott Lawson

Director,

Customer and Relationship Services

Enclosure

09102