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2008 - 2004 XLR & XLR-V: Service Bulletin: Poor Reception of Radio Stations on AM Band, Static/Popping Noise (Install Antenna Service Kit)
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#08-08-44-009: Poor Reception of Radio Stations on AM Band, Static/Popping Noise (Install Antenna Service Kit) - (Apr 3, 2008)

Subject: Poor Reception of Radio Stations on AM Band, Static/Popping Noise (Install Antenna Service Kit)

Models: 2004-2008 Cadillac XLR, XLR-V

Condition
Some customers may comment about poor radio reception for stations on the AM band. Others may comment of static and popping noise on the AM band in some areas.

Cause
This condition may be caused by the lack of a separate antenna mast for the AM band.

Correction
Verify the antenna coax connections. If no concerns are found, install the Antenna Service Kit.

Do not replace the navigation radio to improve AM reception.

Use the following procedure to correct this condition:

Verify that all antenna coax connections between the existing antenna in the deck lid and the navigation radio are fully seated. Follow the diagnostic procedures in SI to correct any concerns that are found.

Important: Please show your customer the picture above of the installed service antenna prior to ordering and installing the Service Antenna Kit. The installation requires that the deck lid will have to be modified to facilitate the antenna mounting and coax pass-through. Once these modifications are performed, they are permanent. If the customer does not approve the installation, no other known antenna enhancements are available.

If the customer approves the antenna installation, install the Antenna Service Kit, P/N 25821144. Detailed installation instructions are included in the kit.

On 2004-2005 model year vehicles equipped with XM Satellite Radio (RPO U2K), the Digital Radio Receiver (XM Module), P/N 15837420, must also be replaced.

Once installation of the Antenna Service Kit is complete, verify proper operation of the radio.

Parts Information
Part Number  --  Description  --  Qty

25821144  --  Antenna Kit-Radio  --  1

15837420  --  Receiver Assembly - Digital Radio (2004-2005 model year with XM Radio [RPO U2K only])  --  1

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

© 2008 General Motors Corporation. All rights reserved.
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