Customer Assistance for Text Telephone (TTY) Users (U.S. and Canada)

GMC Sierra / GMC Sierra Owners Manuals / Customer Information / Customer Information / Customer Assistance for Text Telephone (TTY) Users (U.S. and Canada)

To assist customers who are deaf, hard of hearing, or speech impaired and who use Text Telephones (TTYs), GMC has TTY equipment available at its Customer Assistance Center. Any TTY user can communicate with GMC by dialing:

1-800-462-8583. TTY users in Canada can dial 1-800-263-3830.

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