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Customer Assistance Offices
GMC encourages customers to call the toll-free number
for assistance. If a U.S. customer wishes to write to
GMC, the letter should be addressed to GMC’s Medium
Duty Truck Customer Assistance Center.
United States
GM Medium Duty Truck
Customer Assistance Center
P.O. Box 44947
Detroit, MI 48244
1-800-862-4389
1-800-462-8583 (For Text Telephone devices (TTYs))
Roadside Assistance: 1-800-GMC-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
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