Customer Satisfaction Program – Loss of GPS, OnStar and XM Antenna Functions – 2015 Cadillac Chevrolet GMC

SEOCONTENT-START

Bulletin No.: 15155
Date: August 2015

THIS PROGRAM IS IN EFFECT UNTIL AUGUST 24, 2017.

Condition

Certain 2015 model year Cadillac Escalade, Cadillac Escalade ESV, Chevrolet Silverado Crew Cab, Chevrolet Suburban, Chevrolet Tahoe, GMC Sierra Crew Cab, GMC Yukon, and GMC Yukon XL vehicles may have a condition that can allow water to leak into the vehicle’s roof-mounted antenna. This condition could prevent the vehicle’s OnStar system from accurately determining the vehicle’s location; disable the vehicle’s compass, navigation, and XM radio systems; illuminate the vehicle’s red OnStar LED indicator; and allow water into the interior passenger compartment.

Correction

Dealers are to replace the OnStar antenna.

Vehicles Involved

All involved vehicles are identified by Vehicle Identification Number on the Investigate Vehicle History screen in GM Global Warranty Management system. Dealership service personnel should always check this site to confirm vehicle involvement prior to beginning any required inspections and/or repairs. It is important to routinely use this tool to verify eligibility because not all similar vehicles may be involved regardless of description or option content.

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 to US and Canadian dealers through the GM GlobalConnect Recall Reports. Dealers will not have a report available if they have no involved vehicles currently assigned.

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 program 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 program.

Parts Information

Parts required to complete this program are to be obtained from General Motors Customer Care and Aftersales (GMCCA). Please refer to your “involved vehicles listing” before ordering parts. This part will be on Order Writing control initially and all DRO’s (Daily Replenishment Orders) will cancel.  Dealers can place orders CSO (Customer Special Order). In emergency situations, a dealer should place a SPAC case and the orders will be processed in the order received.

Note: Use the vehicle identification number (VIN) and the GM Electronic Parts Catalog (EPC) to determine which High Frequency Antenna to order.

Description	Quantity/ Vehicle	Part Number
ANTENNA, HIGH FREQUENCY	1	23258456
ANTENNA, HIGH FREQUENCY	1	23258457
ANTENNA, HIGH FREQUENCY	1	23258441 ACDelco 23258441 GM Original Equipment Subterranean High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function $59.95 Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
ANTENNA, HIGH FREQUENCY	1	23258458
ANTENNA, HIGH FREQUENCY	1	23258442 ACDelco 23258442 GM Original Equipment Iridium Colored High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function $69.95 Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
ANTENNA, HIGH FREQUENCY	1	23258459 ACDelco 23258459 GM Original Equipment Black High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
ANTENNA, HIGH FREQUENCY	1	23258443 ACDelco 23258443 GM Original Equipment Black High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function $226.49 Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
ANTENNA, HIGH FREQUENCY	1	23258460 ACDelco GM Original Equipment 23258460 Summit White High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function $227.82 Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
ANTENNA, HIGH FREQUENCY	1	23258444 ACDelco 23258444 GM Original Equipment Summit White High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
ANTENNA, HIGH FREQUENCY	1	23258445 ACDelco GM Original Equipment 23258445 Overcast High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function $39.95 Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
ANTENNA, HIGH FREQUENCY	1	23258461 ACDelco 23258461 GM Original Equipment Plum Berry High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function $49.95 Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
ANTENNA, HIGH FREQUENCY	1	23258446 ACDelco GM Original Equipment 23258446 Plum Berry High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
ANTENNA, HIGH FREQUENCY	1	23258462 ACDelco 23258462 GM Original Equipment Crystal Claret High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
ANTENNA, HIGH FREQUENCY	1	23258447 ACDelco GM Original Equipment 23258447 Crystal Claret High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
ANTENNA, HIGH FREQUENCY	1	23258463 ACDelco 23258463 GM Original Equipment Champagne Silver High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function $55.35 Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
ANTENNA, HIGH FREQUENCY	1	23258448 ACDelco GM Original Equipment 23258448 Champagne Silver High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function $98.44 Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
ANTENNA, HIGH FREQUENCY	1	23258464 ACDelco 23258464 GM Original Equipment White Diamond High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function $122.50 Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
ANTENNA, HIGH FREQUENCY	1	23258465
ANTENNA, HIGH FREQUENCY	1	23258449
ANTENNA, HIGH FREQUENCY	1	23258466 ACDelco GM Original Equipment 23258466 Unripened Green High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
ANTENNA, HIGH FREQUENCY	1	23258467 ACDelco 23258467 GM Original Equipment Sacr'e Blue High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function $55.34 Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
ANTENNA, HIGH FREQUENCY	1	23258468 ACDelco 23258468 GM Original Equipment Sonoma Jewell High Frequency Antenna ACDelco GM OE Antennas have signal strength, clarity, and signal interference protection Made with durable materials to withstand exposure to harsh weather and car washes GM-recommended replacement part for your GM vehicle’s original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API

Service Procedure

1. Remove the High Frequency Antenna. Refer to High Frequency Antenna Replacement in SI.
2. Install the High Frequency Antenna. Refer to High Frequency Antenna Replacement in SI.

Courtesy Transportation

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.

Warranty Transaction Information

Submit a transaction using the table below. All transactions should be submitted as a ZFAT transaction type, unless noted otherwise.

Customer Notification

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

Dealer Program Responsibility

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 August 31 2017.

Customers who have recently purchased vehicles sold from your vehicle inventory, and for which there is no customer information indicated on the involved vehicle 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 facility for service through August 31 2017, you must take the steps necessary to be sure the program correction has been made before selling or releasing the vehicle.

August 2015

Dear General Motors Customer:

This notice applies to your vehicle, VIN: _________________________

We have learned that your 2015 model year Cadillac Escalade, Cadillac Escalade ESV, Chevrolet Silverado Crew Cab, Chevrolet Suburban, Chevrolet Tahoe, GMC Sierra Crew Cab, GMC Yukon, or GMC Yukon XL vehicle may have a condition that can allow water to leak into the vehicle’s roof-mounted antenna. This condition could prevent the vehicle’s OnStar system from accurately determining the vehicle’s location; disable the vehicle’s compass, navigation, and XM radio systems; illuminate the vehicle’s red OnStar LED indicator; and allow water into the interior passenger compartment.

Your satisfaction with your vehicle is very important to us, so we are announcing a program to prevent this condition or, if it has occurred, to fix it.

What We Will Do: Your GM dealer will replace the OnStar antenna. This service will be performed for you at no charge until August 31, 2017. After that, any applicable warranty will apply.

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. By scheduling an appointment, your dealer can ensure that the necessary parts will be available on your scheduled appointment date.

If you have any questions or concerns that your dealer is unable to resolve, 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 GM vehicle provides you many miles of enjoyable driving.

Terry M. Inch
Executive Director
Global Connected Customer Experience

15155