GMC Customer Assistance Centers

GMC Customer Assistance Centers are open Monday through Friday, from 8:00 a.m. to 11:00 p.m. (Eastern Standard Time). To contact the GMC Customer Assistance Center inside the U.S., call:

1-800-462-8782

When calling, please have the following information available:

• Your name, address, and home and daytime telephone numbers
• Your Vehicle Identification Number (VIN)
• Dealership name and location
• Vehicle delivery date and current mileage
• Nature of your concern

Service Manuals and Owner Publications Service manuals, service bulletins, owner manuals, and other service literature are available for purchase for all current and many past model General Motors vehicles. The toll-free telephone numbers for ordering GMC Service Manuals are:

Inside the U.S.:
1-800-551-4123
Inside Canada:
1-800-551-4123

Service manuals contain diagnosis and repair information for all chassis and body systems. These manuals may also be useful for owners who wish to have a greater understanding of their vehicles. These manuals are also useful for owners with the appropriate skill level or training to perform "professional do-it-yourself" service. General Motors service manuals for professional, qualified technicians are also available. In some cases these manuals refer to specialized tools, equipment, and safety procedures necessary to service a vehicle.