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- General Motors
About General Motors
General Motors Company, commonly known as GM, is one of the world’s largest automotive manufacturers and one of the most historically important companies in the American automobile industry. Founded in 1908, General Motors designs, engineers, manufactures, markets, and services cars, pickup trucks, SUVs, commercial vehicles, electric vehicles, automotive components, connected-vehicle technologies, and related mobility products. In the United States, GM’s principal vehicle brands are Chevrolet, Buick, GMC, and Cadillac, each serving different parts of the passenger, truck, utility, performance, and luxury vehicle markets.
Beyond vehicle manufacturing, General Motors operates a much broader automotive ecosystem. Its businesses include GM Financial for vehicle financing and leasing, OnStar and connected services for vehicle communications and safety, GM Genuine Parts and ACDelco-related service products, software and digital vehicle platforms, electric-vehicle technologies, battery systems, and commercial mobility initiatives. GM sells vehicles and provides automotive services in multiple international markets and maintains manufacturing, engineering, technology, design, research, and business operations around the world.
General Motors remains deeply connected with Detroit, Michigan. The company now lists 1240 Woodward Avenue in Detroit as its principal executive office. GM moved its global headquarters to the Hudson’s Detroit development in 2026, replacing the Renaissance Center as its primary headquarters location. The Woodward Avenue headquarters supports executive management, corporate strategy, finance, investor relations, legal affairs, communications, technology, product planning, and other major corporate functions.
Quick Information
Corporate Phone Number
313-667-1500
Customer Service Number
General Motors does not use one universal vehicle-owner Customer Service number. Customers should contact the Customer Assistance Center for their specific GM vehicle brand.
Chevrolet: 1-800-222-1020
Buick: 1-800-521-7300
GMC: 1-800-462-8782
Cadillac: 1-800-458-8006
OnStar: 1-888-466-7827
Corporate Office Address
General Motors Company
1240 Woodward Avenue
Detroit, MI 48265
United States
Headquarters Address
General Motors Company
1240 Woodward Avenue
Detroit, MI 48265
United States
General Motors does not prominently publish one universal general Customer Service email for all vehicle owners. Customers should use the official Contact Us page, vehicle-brand support request, live chat, or account-specific support channel.
Industry
Automotive Manufacturing, Mobility Technology and Financial Services
Founded
September 16, 1908
Number of Employees
Approximately 155,000 employees worldwide as of December 31, 2025.
This included approximately 88,000 hourly employees and 68,000 salaried employees across GM’s global workforce, with approximately 94,000 employees located in the United States.
Corporate Office Hours
General Motors does not publicly publish one standard visitor or switchboard schedule for its Detroit corporate headquarters.
Major U.S. vehicle-brand Customer Assistance Centers such as Chevrolet, Buick, and GMC currently provide general assistance Monday through Saturday from approximately 8:00 AM to 9:00 PM ET, with Sunday closed.
Customer-support hours can vary by brand, department, financial product, roadside service, and connected service.
Website
Investor Relations
investor.gm.com
General Motors Investor Relations can also be reached at:
313-667-1669
Careers Page
search-careers.gm.com
GM’s careers portal provides current openings across engineering, manufacturing, software, artificial intelligence, finance, human resources, communications, design, skilled trades, research, and numerous other professional areas.
General Motors Products & Services
General Motors operates far beyond conventional vehicle manufacturing. The company’s portfolio covers mainstream and luxury vehicles, trucks, electric vehicles, automotive financing, connected services, software, replacement parts, commercial products, and related technologies.
Chevrolet Vehicles
Chevrolet is GM’s largest mainstream U.S. vehicle brand and offers passenger cars, crossovers, SUVs, pickup trucks, commercial vehicles, performance vehicles, and electric models.
The Chevrolet lineup serves a broad range of buyers, including families, commuters, businesses, towing customers, off-road users, performance enthusiasts, and customers transitioning to electric vehicles. Chevrolet owners can also access certified maintenance, warranties, roadside services, connected features, and brand-specific Customer Assistance.
Buick Vehicles
Buick focuses primarily on crossovers and SUVs positioned between mainstream and luxury vehicle segments.
The brand emphasizes comfort, technology, interior design, safety features, connectivity, and premium convenience. Buick customers receive vehicle support through authorized dealerships, the Buick Customer Assistance Center, the myBuick app, and online support resources.
GMC Trucks and SUVs
GMC specializes in trucks, SUVs, commercial vehicles, and premium utility products.
Its portfolio serves customers seeking towing capability, work-focused vehicles, off-road performance, larger family transportation, and premium truck or SUV features. GMC vehicle owners can obtain warranty, service, order-status, connected-service, and ownership assistance through dealerships and GMC Customer Assistance.
Cadillac Luxury Vehicles
Cadillac is General Motors’ luxury automotive brand.
Cadillac develops premium SUVs, sedans, performance vehicles, and electric vehicles incorporating luxury interiors, advanced infotainment, connected technologies, driver-assistance systems, and higher-end performance features.
Electric Vehicles
General Motors continues to develop and sell a growing portfolio of electric vehicles across Chevrolet, GMC, and Cadillac.
Its EV operations include:
- Battery-electric vehicles
- Battery technology
- Charging solutions
- Vehicle software
- Electric commercial products
- Manufacturing infrastructure
- Connected charging services
GM’s electric portfolio includes products targeting mainstream, premium, truck, SUV, and commercial customers.
OnStar and Connected Services
OnStar provides connected safety, security, emergency, navigation, and vehicle-support services for qualifying GM vehicles.
Depending on the vehicle and subscription, services may include:
- Automatic crash response
- Emergency assistance
- Roadside assistance
- Vehicle diagnostics
- Stolen vehicle assistance
- Remote commands
- Connected navigation
- In-vehicle connectivity
OnStar support is separate from ordinary Chevrolet, Buick, GMC, or Cadillac Customer Assistance.
GM Financial
GM Financial is General Motors’ captive automotive finance business.
It provides financing and leasing products to qualifying consumers and commercial financing solutions to GM dealers.
GM Financial handles matters involving:
- Vehicle loan payments
- Lease payments
- Payoff information
- Account statements
- Payment assistance
- Lease-end support
- Commercial dealer finance
Customers with GM Financial accounts should contact GM Financial directly instead of a GM vehicle Customer Assistance Center.
GM Genuine Parts and Vehicle Service
General Motors supports vehicle maintenance and repairs through its authorized dealer network and GM Genuine Parts.
Services can include:
- Scheduled maintenance
- Warranty repairs
- Recall repairs
- Vehicle diagnostics
- Replacement parts
- Software updates
- Collision repairs
- Battery and electrical service
Vehicle owners should normally begin repair and warranty concerns with an authorized dealer.
My GM Rewards
My GM Rewards allows qualifying customers to earn and redeem points on eligible GM-related purchases and activities.
Eligible benefits can involve vehicle purchases, dealership service, accessories, connected services, and other qualifying transactions.
GM Software and Digital Vehicle Services
General Motors continues to expand software-driven features across its vehicle portfolio.
These services can include connected applications, over-the-air software updates, digital vehicle functions, infotainment, safety technology, navigation, and account-based services.
General Motors Corporate Phone Numbers
General Motors operates a large number of specialized support departments. The correct telephone number depends on whether the caller is a vehicle owner, investor, shareholder, financing customer, OnStar subscriber, rewards member, or media professional.
General Motors Corporate Phone Number
313-667-1500
This is the current telephone number General Motors lists with its principal executive offices at 1240 Woodward Avenue in Detroit.
This number is appropriate for legitimate corporate inquiries but should not be used as the first option for ordinary vehicle repairs, warranty claims, billing, or dealership complaints.
General Motors Corporate Headquarters Number
313-667-1500
General Motors’ current SEC filings identify this number with its Detroit principal executive offices.
Chevrolet Customer Service Number
1-800-222-1020
This is Chevrolet’s official U.S. Customer Assistance Center.
Customers can call regarding:
- Chevrolet vehicles
- myChevrolet accounts
- New vehicles
- General ownership questions
- Dealer concerns
- Warranty assistance
- Vehicle-order questions
Current general assistance hours are Monday through Saturday from 8:00 AM to 9:00 PM ET, with Sunday closed.
Quick Customer Service Number
1-800-521-7300
This is Buick’s official general assistance number for vehicle, owner-account, new-vehicle, and other Buick-related inquiries.
Current general assistance hours are Monday through Saturday from 8:00 AM to 9:00 PM ET, with Sunday closed.
GMC Customer Service Number
1-800-462-8782
This is GMC’s official Customer Assistance number for vehicle owners and prospective customers.
Customers can use it for:
- Vehicle assistance
- myGMC account questions
- New vehicle information
- Vehicle-order status
- Warranty concerns
- Dealer-related assistance
Cadillac Customer Service Number
1-800-458-8006
This is the official Cadillac Customer Assistance number for vehicle-owner questions and brand-related support.
OnStar Support Number
1-888-466-7827
This number is specifically for OnStar services.
Customers should use it for qualifying connected-service, safety, subscription, account, and OnStar-related support.
Pontiac Customer Assistance Number
1-800-762-2737
General Motors continues to publish this number for owners of discontinued Pontiac vehicles.
Saturn Customer Assistance Number
1-800-553-6000
This official GM contact remains available for Saturn-related assistance.
HUMMER Legacy Vehicle Support Number
1-866-486-6376
GM identifies this number for HUMMER vehicles from 2010 and earlier model years.
It should not be confused with current GMC HUMMER EV support, which is handled through GMC.
My GM Rewards Member Support
1-844-764-2665
This number is for qualifying My GM Rewards membership assistance.
It should not be presented as general GM vehicle Customer Service.
GM Privacy Support Number
1-866-697-7482
Also expressed as:
1-866-MYPRIVACY
This is a specialized privacy contact for submitting qualifying U.S. consumer privacy requests.
It is not ordinary vehicle Customer Service.
GM Investor Relations Number
313-667-1669
This is General Motors’ official Investor Relations telephone number.
It is intended for institutional analysts, securities analysts, investors, and shareholder-related inquiries rather than consumer vehicle complaints.
GM Shareholder Relations Number
313-667-1500
GM identifies this number for shareholder relations inquiries.
GM Stock Transfer Agent Toll-Free Number
888-887-8945
Shareholders of record requiring assistance with GM stock accounts can contact Computershare, GM’s stock transfer agent.
GM Stock Transfer Agent International Number
1-781-575-3334
This number is for callers outside the United States, Canada, or Puerto Rico who need Computershare assistance with a GM shareholder account.
GM Financial Customer Service Number
800-284-2271
This is the official GM Financial Customer Service number for consumer financing accounts.
Customers should use it for:
- Payments
- Loan accounts
- Lease accounts
- Statements
- Payoff information
- Account servicing
GM Financial Investor Relations Number
800-644-2297
This is GM Financial’s Investor Relations contact and should not be confused with consumer account support.
General Motors Media / Press Contact Number
586-899-7861
GM’s recent 2026 corporate communications materials list this number for GM Communications.
It is intended for media and press inquiries, not ordinary consumer support.
Accessibility and Telecommunications Relay Support
Customers who are deaf, hard of hearing, or have speech disabilities can use 711 to access Telecommunications Relay Services when contacting current Chevrolet, Buick, and GMC Customer Assistance Centers.
How to Reach a Real Person at General Motors
The fastest way to speak with a real person about a General Motors vehicle is to contact the Customer Assistance Center for the vehicle’s specific brand. Chevrolet owners should call 1-800-222-1020, Buick owners 1-800-521-7300, GMC owners 1-800-462-8782, and Cadillac owners 1-800-458-8006. For OnStar concerns, call 1-888-466-7827. Current Chevrolet, Buick, and GMC support systems also provide live chat and online support-request options. When the automated system answers, select the category that most closely matches the problem and request Customer Assistance when offered.
Before calling, have the 17-character VIN, vehicle year and model, mileage, dealership name, repair-order numbers, purchase or lease date, warranty information, dates of previous repair attempts, and any existing GM case number ready. A customer dealing with repeated dealership repairs should keep every repair order because the service dates, mileage, diagnosis, and work performed can be important during GM escalation, warranty review, or a potential state lemon-law process.
General Motors Headquarters & Corporate Office Address
General Motors Global Headquarters and Principal Executive Office
General Motors Company
1240 Woodward Avenue
Detroit, MI 48265
United States
General Motors identifies 1240 Woodward Avenue as its current principal executive-office address.
The headquarters is part of the Hudson’s Detroit development and represents GM’s newest corporate headquarters location in downtown Detroit.
General Motors General Correspondence
General Motors Company
P.O. Box 33170
Detroit, MI 48232-5170
United States
GM publishes this address for general written corporate inquiries.
Customers should identify the vehicle brand, VIN, dealership, existing case number, and requested resolution when submitting vehicle-related correspondence.
Chevrolet Customer Assistance Center
Chevrolet Customer Assistance Center
P.O. Box 33170
Detroit, MI 48232-5170
United States
Chevrolet owners can use this address for written comments, questions, or unresolved concerns.
Buick Customer Assistance Center
Buick Customer Assistance Center
P.O. Box 33172
Detroit, MI 48232-5172
United States
This address is used for written Buick Customer Assistance correspondence.
GMC Customer Assistance Center
GMC Customer Assistance Center
P.O. Box 33172
Detroit, MI 48232-5172
United States
GMC owners can use this address for written Customer Assistance matters.
GM Shareholder Relations
General Motors shareholders requiring assistance with their stock account are directed to GM’s transfer agent:
Computershare Trust Company, N.A.
P.O. Box 43078
Providence, RI 02940-3078
United States
This is a shareholder account address and should not be used for vehicle complaints.
How to File a Complaint Against General Motors
Step 1: Speak With the Dealership Manager
For problems involving a vehicle purchase, repair, warranty service, dealership conduct, parts, or maintenance, begin with the dealership involved. If the issue concerns repairs or warranty work, ask for the Service Manager. For a vehicle purchase or sales concern, ask for the Sales Manager or General Manager. Clearly explain the problem, previous attempts to resolve it, and the specific resolution you want.
Step 2: Contact the Correct GM Customer Assistance Center
If the dealer cannot resolve the matter, contact the appropriate vehicle brand. Chevrolet owners can call 1-800-222-1020, Buick owners 1-800-521-7300, GMC owners 1-800-462-8782, and Cadillac owners 1-800-458-8006. Provide your VIN, mileage, dealer name, repair history, and details of the complaint so the representative can review the matter accurately.
Step 3: Open a Formal GM Case
Ask the Customer Assistance representative to formally document the complaint and provide a case or reference number. Save this number and use it during every future communication. A case number helps GM representatives see the history of the issue and can be particularly important when a complaint requires regional, technical, warranty, or dealer-support review.
Step 4: Submit Supporting Documents
Provide copies of relevant records whenever requested. Useful documentation can include purchase agreements, lease contracts, warranty information, service invoices, repair orders, diagnostic reports, photographs, videos, recall notices, dealership emails, and previous correspondence. Keep the original documents for your own records.
Step 5: Request Escalation to a Senior Customer Assistance Team
If the first GM representative cannot resolve the complaint, ask for the matter to be reviewed by a supervisor or the appropriate higher-level Customer Assistance team. Explain how many times the vehicle has been repaired, how long it has been unavailable, what the dealer has already attempted, and the outcome you are requesting.
Step 6: Send a Written Complaint to General Motors
For a serious unresolved complaint, send written correspondence to:
General Motors Company
P.O. Box 33170
Detroit, MI 48232-5170
United States
Include your full name, address, telephone number, vehicle brand, VIN, current mileage, dealership, GM case number, repair history, dates of all significant contacts, and the exact resolution being requested. Written complaints can be useful when documenting a long-running warranty or dealer dispute.
Step 7: Use the Applicable Warranty or Dispute Resolution Process
If the complaint involves repeated unsuccessful warranty repairs, review the dispute-resolution information supplied with the vehicle warranty documents. Depending on the vehicle, location, and state law, additional informal dispute-resolution procedures, arbitration programs, or lemon-law rights may be available. Follow required deadlines carefully and maintain a complete repair history.
Step 8: Report Serious Vehicle Safety Problems
If the complaint involves a defect that could create a safety risk, report it to General Motors and consider submitting a vehicle-safety complaint to the National Highway Traffic Safety Administration. Examples may include serious brake, steering, airbag, seat-belt, fire, electrical, propulsion, or unexpected vehicle-control problems. Do not continue operating a vehicle if doing so appears unsafe.
Step 9: Contact State or Federal Consumer Authorities
If reasonable efforts with the dealer and General Motors do not resolve the complaint, consumers may consider contacting their state attorney general, state motor-vehicle regulator, consumer-protection agency, applicable lemon-law program, or another appropriate authority. Provide the GM case number, vehicle records, repair orders, written correspondence, and evidence showing the steps already taken to resolve the complaint directly.
