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Customer Assistance Offices
HUMMER encourages customers to call the toll-free
number for assistance. If a U.S. customer wishes to
write to HUMMER, the letter should be addressed to
HUMMER’s Customer Assistance Center.
United States
HUMMER Customer Assistance Center
P.O. Box 33177
Detroit, MI 48232-5177
1-866-HUMMER6 (486–6376)
(For Text Telephone devices (TTYs))
Roadside Assistance: 1-800-GMC-8782 (462-8782)
From:
Puerto Rico: 1-800-496-9992 (English)
1-800-496-9993 (Spanish)
U.S. Virgin Islands: 1-800-496-9994
Fax Number: 313-381-0022
Canada
General Motors of Canada Limited
Customer Communication Centre, 163-005
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7
1-800-263-3777 (English)
1-800-263-7854 (French)
1-800-263-3830 (For Text Telephone devices (TTYs))
Roadside Assistance: 1-800-268-6800
All Overseas Locations
Please contact the local General Motors Business Unit.
Mexico, Central America and Caribbean
Islands/Countries (Except Puerto Rico and
U.S. Virgin Islands)
General Motors de Mexico, S. de R.L. de C.V.
Customer Assistance Center
Paseo de la Reforma # 2740
Col. Lomas de Bezares
C.P. 11910, Mexico, D.F.
01-800-508-0000
Long Distance: 011-52 - 53 29 0 800