To file a complaint about vehicle services (Trucks, SUVs, HUMMER EV, or Vans) of GMC, a brand of General Motors (GM), such as maintenance/repair of GMC vehicles, warranty services of new cars, myGMC account, or car bookings (cancellation, payment, charges) and quality of vehicle services at service center, you can follow this guide and use the provided contact details of customer service:
GMC Customer Support:
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Hotline: Contact the GMC Customer Assistance Center by calling the toll-free number 1800-323-9935. They are available Monday through Friday from 8 a.m. to 8 p.m. (EST), and on Saturdays and Sundays, they are closed.
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Customer Service: For help with adaptive equipment for persons with disabilities, call at 1800-323-9935.
Call the Customer Service for Roadside Assistance at:
In USA:
| Vehicle Type | Phone Number |
|---|---|
| Gas-Powered | 188888133024 |
| Electric Vehicles (EV) | 184451514185 |
In Canada:
| Vehicle Type | Phone Number |
|---|---|
| Gas-Powered | 180026868006 |
| Electric Vehicles (EV) | 184463717567 |
For complaints or queries regarding My GMC Rewards or Rewards Card, contact at 1844-764-2665. In case of assistance for your GM Financial account, call at 1800-284-2271.
Steps to File an online complaint:
- Visit the official GMC website (gmc.com)
- Navigate to the “support” or “contact” section.
- Click “Go to Support” or “Access my account” to login to your account.
- Open the online complaint form.
- Fill out the online complaint form with details about your vehicle (model, registration ID, etc.) and the nature of the complaint.
- Submit the form and wait for a confirmation email or message.
You can use the myGMC app, available on Apple and Android, to schedule vehicle services, access owner’s manuals, use remote start, request Roadside Assistance, and more vehicle services.
If not resolved, contact your dealer or nearest service center of General Motors.
Escalation to Head Office:
If your issue is not resolved satisfactorily, you can escalate it by contacting Customer Assistance Center at head office. You can write a letter to the head office by providing reference/ticket ID and expected resolution from the company. Send your comments, questions, or the complaint letter by postal mail at:
In USA:
- Address: GMC Customer Assistance Center, P.O. Box 33172, Detroit, MI 48232-5172.
In Canada:
- Address: Canada - GM of Canada, 1908 Colonel Sam, Oshawa, Ontario, L1H 8P7, Canada, Mail Code 163-005.
Consumer Protection Agency:
If your complaints about GMC vehicles are not resolved by General Motors, gather all relevant documentation of your complaint and contact the local consumer protection office of the state or file a complaint to the Consumer Protection Bureau of the Federal Trade Commission (FTC). They will assist you with the process and any necessary legal steps.
If your complaint is related to the vehicle safety issue, file a report with the National Highway Traffic Safety Administration (NHTSA). If all else fails, consider consulting an attorney specializing in consumer protection or lemon laws to explore legal options.
Tips: While escalating your complaints, must provide your experience with the support team, supported by all relevant documents and correspondence with GMC.
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