Customer Satisfaction - Water in Headlamps-Install New Vent Tubes

1. Check the vehicle service history in GMVIS to determine if the headlamp assembly has been replaced.

•	If the headlamp assembly has been replaced with any of the service part numbers provided below, no further action is required for that headlamp.

•	Vehicle headlamp assemblies that have NOT been replaced with any of the service part numbers in the table below will require a headlamp assembly service repair. Proceed to Step 2.

•

A programming event is required for 2007 model year vehicles only. Refer to the programming instructions in this bulletin. Some 2007 vehicles will require the headlamp assembly repair and programming event. Refer to the table below to determine if the 2007 model year vehicle requires the headlamp assembly service repair..

-	25806708 - RH HID SAE

-	25806709 - LH HID SAE

-	25806710 - RH HID ECE RHD

-	25806711 - LH HID ECE RHD

-	25806712 - RH HID ECE LHD

-	25806713 - LH HID ECE LHD

-	25918797 - RH HID SAE

-	25918798 - LH HID SAE

-	25918799 - RH HID ECE RHD

-	25918800 - LH HID ECE RHD

-	25918801 - RH HID ECE LHD

-	25918802 - LH HID ECE LHD

-	25998514 - RH HID ECE RHD

-	25998515 - LH HID ECE RHD

-	25998516 - RH HID ECE LHD

-	25998517 - LH HID ECE LHD

-	25998518 - RH HID SAE

-	25998519 - LH HID SAE

2. Remove the headlamp assembly from the vehicle and place it on a work bench. Refer to High Intensity Discharge Headlamp Replacement in SI.




Important: Use a flat-blade screwdriver or finger to remove the vent tube (5).

3. Remove the vent tubes (5) from the four locations of the headlamp assembly. Refer to the illustration. If there is glue in the location of the number 2 location, no additional action is required there. Remove the vent tubes from locations 1, 3, and 4.



4. Insert a service cap (1) in the four locations where the vent tubes were removed.
5. Install the headlamp assembly. Refer to High Intensity Discharge Headlamp Replacement in SI.
6. Verify the headlamp operation to ensure proper headlamp aim and function.
7. Program the Body Control Module (BCM) (2007 model year vehicles only). Refer to Programming Instructions for 2007 Model Year Vehicles below.

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 09/15/08 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.

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 an approved Midtronic 165-PSC charger to maintain proper battery voltage during programming.
2. Reprogram the Body Control Module (BCM). 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 J2534 Tech 2® 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 BCM Body Control Module from the Supported Controllers screen.

2.3.	Follow the on-screen instructions.

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

All customer requests for reimbursement for previous repairs for the condition will be handled by the Customer Assistance Center, not by dealers.

A General Motors Customer Reimbursement Procedure and Claim Form is included with the customer letter.

Important: (For GM Only) Refer to the GM Service Policies and Procedures Manual, section 6.1.12, for specific procedures regarding customer reimbursement and the form.

Customer requests for reimbursement for previous repairs for the condition are to be submitted to the dealer by October 31, 2009.

All reasonable customer paid receipts should be considered for reimbursement. The amount to be reimbursed will be limited to the amount the repair would have cost if completed by an authorized General Motors dealer.

When a customer requests reimbursement, they must provide the following:

Claims for customer reimbursement on previously paid repairs are to be submitted as required by WINS.

Important: Refer to the GM Service Policies and Procedures Manual, section 6.1.12, for specific procedures regarding customer reimbursement verification.

Submit a Product Claim with the information indicated below:

Refer to the General Motors WINS Claims Processing Manual for details on Product Recall Claim Submission.

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

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.

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

Dealers are to service all vehicles subject to this program at no charge to customers, regardless of mileage, age of vehicle, or ownership, through October 31, 2009.

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. Program 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 program enters your vehicle inventory, or is in your dealership for service through October 31, 2009, you must take the steps necessary to be sure the program correction has been made before selling or releasing the vehicle.

Dear General Motors Customer:

We have learned that your 2006 or 2007 model year Cadillac DTS limousine or livery vehicle may have a condition in which water may enter the headlamp assemblies. If your vehicle is frequently washed by hand, large amounts of water directed towards the grille can enter the headlamp assemblies through the vent tubes. Water entering a headlamp assembly may fog the lens or it may corrode the terminals of the high intensity discharge module, resulting in the headlamp becoming inoperative. Bulb life for daytime running lights (DRLs) may also be reduced because these types of vehicles are often running with the vehicle in PARK.

Your satisfaction with your 2006 or 2007 model year Cadillac DTS limousine or livery vehicle is very important to us, so we are announcing a program to correct this condition.

What We Will Do: Your GM dealer will install new vent tubes that have been redesigned to include a vapor barrier. If you have had the headlamp assembly(s) recently replaced, they may already have a vapor barrier instead of vent tubes. Your dealer will be able to make this determination after examining the headlamp assemblies. If your vehicle is a 2007 model year vehicle, your dealer will also reprogram the body control module to disable the DRLs when the vehicle is in PARK. The programming change cannot be made to 2006 model year vehicles. This service will be performed for you at no charge until October 31, 2009 .

What You Should Do: To limit any possible inconvenience, we recommend that you contact your dealer as soon as possible to schedule an appointment for this repair.

Customer Reply Form: The enclosed customer reply form identifies your vehicle. Presentation of this form to your dealer will assist in making the necessary correction in the shortest possible time. If you no longer own this vehicle, please let us know by completing the form and mailing it back to us.

Reimbursement: The enclosed form explains what reimbursement is available and how to request reimbursement if you have paid for repairs for this condition. Your request for reimbursement, including the information and documents mentioned on the enclosed form, must be received by GM by October 31, 2009.

If you have any questions or need any assistance to better understand related repairs, please contact your dealer. If you have questions related to a potential reimbursement, please contact the appropriate Customer Assistance Center at the number listed below.

We sincerely regret any inconvenience or concern that this situation may cause you. We want you to know that we will do our best, throughout your ownership experience, to ensure that your Cadillac DTS provides you many miles of enjoyable driving.

Scott Lawson

General Director,

Customer and Relationship Services

Enclosure

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