For 1990-2009 cars

# Service Update for Inventory Vehicles Only-Pedal Noise/Buzz, Extra Effort Needed to Depress Brake Pedal After Vehicle Has Not Been Driven for Extended Period of Time

Subject: | 08153 -- Service Update for Inventory Vehicles Only -- Pedal Noise/Buzz, Extra Effort Needed to Depress Brake Pedal After Vehicle Has Not Been Driven for Extended Period of Time - Expires October 31, 2008

Models: | 2008 Daewoo G2X

| 2008 Pontiac Solstice GXP

| 2008 Saturn SKY Redline

THIS SERVICE UPDATE INVOLVES VEHICLES IN DEALER/RETAILER INVENTORY ONLY AND WILL EXPIRE OCTOBER 31, 2008.

Calibrations required to perform this service update will be available:

- Automatic transmission - Monday, April 28, 2008

- Manual transmission - May 2008 (dealers/retailers will be notified when available)

### Purpose

This bulletin provides a service procedure to reprogram the electronic brake control module (EBCM) and the engine control module (ECM) on certain 2008 model year Daewoo G2X, Pontiac Solstice GXP, and Saturn SKY Redline vehicles. These vehicles may have increased brake pedal effort due to low brake booster vacuum conditions that may occur after the vehicle has not been operated for an extended period of time and/or at higher altitudes and restarted. In addition, there may be brake pedal movement or pulsation accompanied by a ratchet sound coming from the brake system during optimized hydraulic boost (OHB) activation when braking. These conditions can occur for up to approximately 60 seconds after vehicle start-up.

After the EBCM/ECM calibration, brake pedal movement or pulsation accompanied by a ratchet sound will be reduced.

This service procedure should be completed on involved vehicles currently in dealership/retailer inventory as soon as possible but no later than October 31, 2008, at which time this bulletin will expire.

### Vehicles Involved

A list of involved vehicles currently in dealer/retailer inventory is available on the "Service Update Bulletin Information" link under the "Service" tab in DealerWorld (GM and Saturn US) or attached to the Dealer/Retailer Communication (Canada) used to release this bulletin.

Important: Dealers/retailers are to confirm vehicle eligibility prior to beginning repairs by using the system(s) below. Not all vehicles within the above breakpoints may be involved.

- GM dealers and Canadian Saturn retailers should use GMVIS. - Saturn US retailers should use the 'Investigate Vehicle History' link on the Global Warranty Management application within DealerWorld.

### Parts Information

No parts are required for this service update.

### Service Procedure

Important: The calibrations for this service update will be released in two phases. The first phase will be for vehicles equipped with an automatic transmission. The second phase will be released in May 2008 and will be for vehicles equipped with a manual transmission.

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) or Tech 2® scan tool and TIS2WEB with the calibration update. Use TIS2WEB on or after 04/29/08 to obtain the calibration. If you cannot access the calibration, call the Techline Customer Support Center and it will be provided.

#### Service Programming System (SPS)

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

Review the information below to ensure proper programming protocol.

Important:

• | DO NOT program a control module unless you are directed by a service procedure or you are directed by a General Motors Corporation service bulletin. Programming a control module at any other time will not permanently correct a customer's concern.

• | It is essential that the Multiple Diagnostic Interface (MDI) or Tech 2® and the TIS terminal are equipped with the latest software before performing (SPS).

• | Due to the time requirements of programming a controller, it is recommended that an external power source be used to maintain system voltage. Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. To ensure trouble-free programming, GM recommends using one of the following external power sources:

- | A Midtronic PCS charger.

- | A fully charged 12V jumper or booster pack disconnected from the AC voltage supply.

- | Some modules will require additional programming/setup events performed before or after programming.

- | Some vehicles may require the use of a CANDi module for programming.

- | Review the appropriate service information for these procedures.

- | DTCs may set during programming. Clear DTCs after programming is complete.

- | Clearing powertrain DTCs will set the Inspection/Maintenance (I/M) system status indicators to NO.

Ensure the following conditions are met before programming a control module:

• | FlexFuel (E85) Vehicles

- | The fuel composition learn function is inactive. Programming with the fuel composition learn active will result in fuel trim DTCs.

- | If necessary, drive the vehicle until the scan tool indicates that the fuel composition learn is inactive.

• | Vehicle System Voltage

- | There is not a charging system concern. All charging system concerns must be repaired before programming a control module.

- | Battery voltage is greater than 12 volts but less than 16 volts. The battery must be fully charged before programming the control module.

- | Turn OFF or disable any system that may put a load on the vehicle’s battery, such as the following components:

- | Twilight sentinel

- | Interior lights

- | Daytime running lights (DRL) - Applying the parking brake, on most vehicles, disables the DRL system

- | Heating, ventilation, and air conditioning (HVAC) systems

- | Engine cooling fans, radio, etc.

• | The ignition switch must be in the proper position. SPS prompts you to turn ON the ignition, with the engine OFF. DO NOT change the position of the ignition switch during the programming procedure, unless instructed to do so.

• | Make certain all tool connections are secure, including the following components and circuits:

- | The RS-232 communication cable port.

- | The connection at the data link connector (DLC)

- | The voltage supply circuits

• | DO NOT disturb the tool harnesses while programming. If an interruption occurs during the programming procedure, programming failure or control module damage may occur.

• | DO NOT turn OFF the ignition if the programming procedure is interrupted or unsuccessful. Ensure that all control module and DLC connections are secure and the TIS terminal operating software is up to date. Attempt to reprogram the control module. If the control module cannot be programmed, replace the control module.

1. 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 approved Midtronics 165-PSC charger, a fully charged 12V jumper, or booster pack disconnected from the AC voltage supply to maintain proper battery voltage during programming.
2. Reprogram the electronic brake control module (EBCM) and the engine control module (ECM). Refer to SI and Service Programming System (SPS) documentation for programming instructions, if required.

2.1. | Connect the MDI or Tech 2® to the vehicle.

| Important: Select J2534 MDI or Tech 2® Legacy Pass-Thru and Reprogram ECU from the Select Diagnostic Tool and Programming Process screen. The J2534 MDI will reprogram the module in less time than the Tech 2® scan tool.

2.2. | Select EBCM/ECM Sequential Programming from the Supported Controllers screen.

2.3. | Follow the on-screen instructions.

Important: Clearing DTCs will erase stored history data from all controllers, and will reset the PCM I/M flags. Performing the crankshaft position variation relearn procedure using the Special Function menu on the Tech 2® may be required after programming. Refer to Service Manual DTCP1336/P0315 (System Variation Not Learned).

3. Using the MDI or Tech 2®, clear all DTCs if required.

### Claim Information - GM and Saturn Canada Only

For vehicles repaired under this service update, use:

Labor Operation | Description | Labor Time
--- | --- | ---
V1815 | Reprogram EBCM and ECM | 0.4

### Claim Information - US Saturn

1. To receive credit, submit a claim with the information below:

Labor Operation | Description | Case Type | Labor Time
--- | --- | --- | ---
V1815 | Reprogram EBCM and ECM | VC | 0.4