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- General Motors
About General Motors
General Motors, commonly known as GM, is one of the largest automobile manufacturers in the United States and one of the world’s most recognized automotive companies. The company was founded in 1908 and has played a major role in the development of the American automotive industry for more than a century.
Today, General Motors designs, manufactures, markets, and services vehicles through major brands including Chevrolet, Buick, GMC, and Cadillac. The company also operates businesses related to vehicle financing, connected services, software, autonomous-driving technology, electric vehicles, and automotive innovation.
General Motors is led by Chair and Chief Executive Officer Mary Barra, who has served as CEO since 2014. Mark Reuss serves as President of General Motors, while Paul Jacobson serves as Executive Vice President and Chief Financial Officer.
In January 2026, GM officially opened its new global headquarters at Hudson’s Detroit on Woodward Avenue. The move brought General Motors back to Woodward Avenue, where one of the company’s earliest Detroit headquarters was located more than a century ago.
Quick Information
Industry
Automotive Manufacturing
Founded
1908
Corporate Phone Number
(313) 556-5000
Customer Service Number
Customer assistance is handled by individual GM brands. Chevrolet customers can call 1-800-222-1020.
Corporate Office Address
1240 Woodward Avenue
Detroit, Michigan
United States
Headquarters Address
Hudson’s Detroit
1240 Woodward Avenue
Detroit, Michigan
United States
shareholder.relations@gm.com
Chair & CEO
Mary Barra
President
Mark Reuss
Major U.S. Brands
Chevrolet, Buick, GMC, and Cadillac
Investor Relations Phone
313-667-1669
Website
General Motors Products & Services
General Motors operates across several areas of the automotive industry, ranging from passenger vehicles and trucks to financing and connected-vehicle technology.
Chevrolet
Chevrolet is GM’s largest mass-market vehicle brand and offers passenger cars, SUVs, pickup trucks, commercial vehicles, performance vehicles, and electric vehicles.
GMC
GMC focuses heavily on trucks, SUVs, and premium utility vehicles. Its lineup includes vehicles such as the Sierra, Canyon, Yukon, Terrain, and HUMMER EV.
Cadillac
Cadillac is General Motors’ luxury vehicle division. The brand produces luxury sedans, SUVs, performance vehicles, and a growing range of electric vehicles.
Buick
Buick operates as a premium automotive brand with a lineup focused primarily on SUVs and crossovers in the United States.
GM Financial
General Motors also provides automotive financing through GM Financial. The company offers vehicle loans, leasing, commercial lending, and financial services for customers and GM dealerships.
Connected and Digital Services
GM provides connected-vehicle services through platforms including OnStar and its vehicle applications. Depending on the vehicle and subscription, services may include roadside assistance, emergency support, navigation, remote vehicle controls, diagnostics, and other connected features.
General Motors Corporate Phone Numbers
General Motors Corporate Office
(313) 556-5000
This number has historically served as General Motors’ main corporate telephone number. Customers should understand that ordinary vehicle complaints are usually handled through the customer-assistance center for the specific GM brand rather than through the corporate switchboard.
Chevrolet Customer Assistance
1-800-222-1020
For questions about Chevrolet vehicles, accounts, warranties, dealerships, or general customer concerns.
Buick Customer Assistance
1-800-521-7300
For Buick vehicle owners requiring customer assistance.
GMC Customer Assistance
1-800-462-8782
For GMC owners with questions about their vehicle, account, dealership service, or other support matters.
Cadillac Customer Assistance
1-800-458-8006
For Cadillac customer-care inquiries.
OnStar Customer Service
1-888-466-7827
For OnStar subscriptions, connected services, account issues, and related assistance.
GM’s current privacy documentation specifically directs vehicle owners to the customer-assistance center associated with their individual vehicle brand.
How to Reach a Real Person at General Motors
The best way to reach a real person at General Motors depends on the brand of vehicle you own.
For example, Chevrolet customers should call 1-800-222-1020, GMC customers can call 1-800-462-8782, Buick customers can call 1-800-521-7300, and Cadillac customers can call 1-800-458-8006. GM currently lists these as the appropriate Customer Assistance Centers for vehicle-related issues.
When calling, have your Vehicle Identification Number (VIN), vehicle mileage, dealership name, service history, and details of the problem available. This information can help the advisor locate the vehicle record and understand the issue more quickly.
For many vehicle concerns, GM recommends contacting the dealership first. If the dealer cannot resolve the issue, customers can contact the appropriate brand’s Customer Assistance Center and request additional assistance or escalation.
Chevrolet, Buick, GMC, and Cadillac also provide online support-request forms and chat services. Chevrolet and GMC state that customers submitting an online support request can generally expect an advisor to contact them within one business day.
General Motors Headquarters & Corporate Office Address
General Motors officially opened its new global headquarters at Hudson’s Detroit in January 2026.
General Motors Global Headquarters
Hudson’s Detroit
1240 Woodward Avenue
Detroit, Michigan
United States
General Motors occupies several upper floors of the Hudson’s Detroit office building as well as street-level showcase space. The company signed a long-term lease for the location and became the development’s anchor corporate tenant.
The headquarters move is historically significant because it brings General Motors back to Woodward Avenue. GM’s first Detroit headquarters was located at 127-129 Woodward Avenue from 1911 until 1923.
The company later operated from the General Motors Building at 3044 West Grand Boulevard before moving its global headquarters to the Renaissance Center in 1996. GM remained based at the Renaissance Center for approximately three decades before relocating to Hudson’s Detroit.
Former General Motors Headquarters
300 Renaissance Center
Detroit, MI 48265
United States
Older GM documents, regulatory filings, and third-party business listings may still show the Renaissance Center address. This was GM’s headquarters before the company’s move to Hudson’s Detroit.
For current corporate correspondence, users should verify the appropriate GM department before mailing documents because individual departments may use specific mail codes or addresses.
How to File a Complaint Against General Motors
Step 1: Contact the Dealership
For vehicle repairs, warranty problems, service disputes, or concerns about a recent vehicle purchase, begin by contacting the dealership where the vehicle was purchased or serviced.
Ask to speak with the service manager, sales manager, or dealership general manager depending on the issue.
Step 2: Contact the Appropriate GM Customer Assistance Center
If the dealership cannot resolve the problem, contact the customer-assistance center for your vehicle brand.
Chevrolet: 1-800-222-1020
Buick: 1-800-521-7300
GMC: 1-800-462-8782
Cadillac: 1-800-458-8006
Explain the problem clearly and provide your VIN, mileage, dealership information, dates of previous visits, repair orders, and any case number you have already received.
Step 3: Request Escalation
If the first customer-service representative cannot resolve your complaint, ask whether the case can be escalated to a senior advisor or another appropriate GM customer-care representative.
Keep the case number and maintain records of every conversation.
Step 4: Submit a Written or Online Complaint
GM brands also allow customers to submit support requests online.
For example, Chevrolet provides online support requests, live chat, and a Customer Assistance Center mailing address:
Chevrolet Customer Assistance Center
P.O. Box 33170
Detroit, MI 48323-5136
GMC provides written customer correspondence through:
GMC Customer Assistance Center
P.O. Box 33172
Detroit, MI 48232-5172
Step 5: Use BBB AUTO LINE When Applicable
Some unresolved vehicle warranty or repair disputes may qualify for the BBB AUTO LINE dispute-resolution program.
GM vehicle owner documentation directs eligible customers to this program when a dispute remains unresolved after working with the dealership and General Motors Customer Assistance.
Step 6: Contact an Appropriate Government Agency
Serious unresolved concerns involving vehicle safety may also be reported to the National Highway Traffic Safety Administration.
Consumer disputes involving sales, warranties, financing, or business practices may also be reported to the appropriate state consumer-protection agency or attorney general’s office when applicable.
