General Motors Headquarters & Corporate Office

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

Email

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

www.gm.com

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.