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Page 5 September 2008 Bulletin No.: 07076

October 2008

Dear GM Customer:

As the owner of a 2004 model year Buick Rainier or GMC Envoy XUV; 2002-2004 model year
Chevrolet TrailBlazer, TrailBlazer EXT; GMC Envoy, Envoy XL; or Oldsmobile Bravada vehicle,
your satisfaction with our product is very important to us.

This letter is intended to make you aware that on some 2004 model year Buick Rainier and GMC
Envoy XUV; 2002-2004 model year Chevrolet TrailBlazer, TrailBlazer EXT; GMC Envoy, Envoy
XL; and Oldsmobile Bravada vehicles operated in one of the corrosion areas listed below, the fuel
tank modular reservoir assembly, which contains the fuel pump, may develop corrosion of the fuel
feed/return pipes after an extended period of time. Severe corrosion may cause the formation of
small perforations. These perforations may allow a small amount of fuel to accumulate in a
recessed area outside of the fuel tank. If this were to occur, it would be accompanied by a fuel
odor. If left uncorrected and the corrosion is allowed to progress, a fuel spray from the pipes may
begin to occur.

Connecticut Maine New Hampshire Vermont
Delaware Maryland New Jersey West Virginia
District of Columbia Massachusetts New York Wisconsin
Illinois Michigan Ohio

Indiana Minnesota Pennsylvania

lowa Missouri Rhode Island

New Brunswick Nova Scotia Prince Edward Island

Newfoundland Ontario Quebec

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 this
condition. If this condition occurs on your 2004 model year Buick Rainier or GMC Envoy XUV;
2002-2004 model year Chevrolet TrailBlazer, TrailBlazer EXT; GMC Envoy, Envoy XL; or
Oldsmobile Bravada 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 October 31, 2009.

Page 6 September 2008 Bulletin No.: 07076
lf 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.

Division

Number

Text Telephones
(TTY)

Buick

1-866-608-8080

1-800-832-8425

Chevrolet

1-800-630-2438

1-800-833-2438

GMC

1-866-996-9463

1-800-462-8583

Oldsmobile

1-800-630-6537

1-800-833-6537

Saab — U.S.

1-800-955-9007

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

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
07076