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Page 8 September 2008 Bulletin No.: 07187B

Dear General Motors Customer: —

As the owner of a 2003 or 2004 model year Cadillac Escalade, Escalade ESV or Escalade EXT;
Chevrolet Avalanche, Silverado, Suburban, or Tahoe; or GMC Sierra, Yukon, or Yukon XL
vehicle, your satisfaction with our product is very important to us.

This letter is intended to make you aware that some of these vehicles could develop a condition
where one or more of the instrument panel gauge needles may stick, flutter, or become
inoperative. This may cause inaccurate readings, including the speedometer and the fuel gauge.

Do not take your vehicle to your GM dealer as a result of this letter unless you believe that
your vehicle has this condition.

What We Have Done: General Motors is providing owners with a special coverage that extends
the warranty on the instrument panel cluster for the condition described above. If this condition
occurs on your 2003 or 2004 model year Cadillac Escalade, Escalade ESV, or Escalade EXT;
Chevrolet Avalanche, Silverado, Suburban, or Tahoe; GMC Sierra, Yukon, or Yukon XL within 7
years of the date your vehicle was originally placed in service or 70,000 miles, whichever occurs
first, the condition will be repaired for you at no charge.

What You Should Do: Repairs and adjustments qualifying under this special coverage must be
performed by a General Motors dealer. If you believe your vehicle has this condition, contact your
GM dealer to schedule an appointment at a time that is convenient for you. Your dealer will
inspect the vehicle and if the condition is found, your dealer will replace the instrument panel
cluster. When calling your dealer, please have your 17-character vehicle identification number
(VIN) handy so your dealer can ensure that the cluster will be available on your appointment date.
Keep this letter with your other important glove box literature for future reference.

Reimbursement: The enclosed form explains what reimbursement is available and how to
request reimbursement if you have paid for repairs for the special coverage condition.

If you have any questions or need any assistance, just contact your dealer or the appropriate
Customer Assistance Center at the number listed below. The Customer Assistance Center’s
hours of operation are from 8:00 AM to 11:00 PM, EST, Monday through Friday.

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 1-671-648-8650

Puerto Rico — English 1-800-496-9992
Puerto Rico — Espanol 1-800-496-9993
Virgin Islands 1-800-496-9994

We are sorry for any inconvenience you may experience; however we have taken this action in
the interest of your continued satisfaction with our products.

General Motors Corporation

Enclosure
07187