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Page 7 August 2008 Bulletin No.: 07301

August 2008

Dear General Motors Customer:

As the owner of a 2005 model year Chevrolet Corvette or Pontiac GTO vehicle, equipped with a
6.0L V8 engine, your satisfaction with our product is very important to us.

This letter is intended to make you aware that some 2005 model year Chevrolet Corvette and
Pontiac GTO vehicles, equipped with a 6.0L V8 engine, may experience a condition where the
fuel tank filler cap won't tighten properly or the cap won't come off, or is broken. These conditions
may also cause the illumination of the Malfunction Indicator Light (MIL).

Additionally, please be aware that the fuel tank filler cap may not seal adequately to the filler neck
if pushed down when being tightened. Do not apply a downward force to the fuel cap when
tightening.

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

What We Have Done: General Motors is providing owners with additional protection for the fuel
tank filler cap. If this condition occurs on your 2005 model year Chevrolet Corvette or Pontiac
GTO vehicle within 10 years of the date your vehicle was originally placed in service or 120,000
miles (193,000 km), whichever occurs first, the condition will be repaired for you at no charge.
Diagnosis or repair for conditions other than the condition described above is not covered under
this special coverage program.

What You Should Do: Repairs and adjustments qualifying under this special coverage must be
performed by a General Motors dealer. You may want to contact your GM dealer to find out how
long they will need to have your vehicle so that you may schedule the appointment at a time that
is convenient for you. This will also allow your dealer to order parts if they are not already in
stock. 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. Your
request for reimbursement, including the information and documents mentioned on the enclosed
form, must be received by GM by August 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.

Text Telephones

Division Number (TTY)
Chevrolet 1-800-630-2438 1-800-833-2438
Pontiac 1-800-620-7668 1-800-833-7668
Guam 1-671-648-8450

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

Page 8 August 2008 Bulletin No.: 07301

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
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