General Motors Headquarters

General Motors headquarters has a new address. In January 2026, after three decades in the Renaissance Center on the Detroit riverfront, GM moved its global headquarters up Woodward Avenue to Hudson’s Detroit, the new skyscraper complex built on the site of the old J.L. Hudson department store. Below you will find the current corporate office address, the verified customer assistance phone numbers for Chevrolet, GMC, Buick, Cadillac and OnStar, the mailing addresses GM actually monitors, and the escalation steps that work when a dealer or call center cannot resolve your problem.

General Motors Headquarters Location and Contact Information

General Motors Company is headquartered at 1240 Woodward Avenue, Detroit, MI 48265, inside Hudson’s Detroit, the Bedrock-developed office tower and skyscraper complex on Woodward Avenue in downtown Detroit. This is a very recent change. GM’s quarterly report for the period ended June 30, 2026 lists 1240 Woodward Avenue as the address of its principal executive offices, replacing 300 Renaissance Center, the riverfront tower complex that appeared on every GM filing from 1996 through 2025. GM announced the relocation in April 2024, signed an initial 15-year lease for the top office floors of the Hudson’s Detroit office building plus street-level vehicle showcase space, and moved its headquarters staff into the new space during the week of January 12, 2026.

The move is a homecoming of sorts: GM’s first Detroit headquarters opened at 127–129 Woodward Avenue in 1911, and Hudson’s Detroit is the company’s fourth headquarters address in the city, after the Albert Kahn-designed General Motors Building on West Grand Boulevard (1923–1996) and the Renaissance Center (1996–2026). Keep in mind that the Woodward Avenue headquarters is an executive office. There is no walk-in customer service desk, no parts counter and no warranty department there — vehicle problems are handled by dealers and by each brand’s Customer Assistance Center, listed below. The ground floor does include “Entrance One,” a public showroom that rotates the latest Chevrolet, Buick, GMC and Cadillac models.

Phone Contacts

GM does not run a single company-wide customer service line. Instead, each brand operates its own Customer Assistance Center, and GM’s corporate contact page simply routes owners to the brand sites. These numbers are published on the official Chevrolet, GMC, Buick, Cadillac and OnStar contact pages:

• Chevrolet Customer Assistance: 1-800-222-1020 — Monday–Saturday 8 AM–9 PM ET, closed Sunday (chevrolet.com)
• GMC Customer Assistance: 1-800-462-8782 — Monday–Saturday 8 AM–9 PM ET
• Buick Customer Assistance: 1-800-521-7300 — Monday–Saturday 8 AM–9 PM ET
• Cadillac Customer Assistance: 1-800-333-4223 — Monday–Saturday 8 AM–9 PM ET
• OnStar member services and emergencies: 1-888-466-7827 (1-888-4ONSTAR); TTY 1-877-248-2080 (onstar.com)
• My GM Rewards member support: 1-844-764-2665
• GM Stockholder Services (investor questions): 1-313-667-1432
• Corporate switchboard: (313) 667-1500 — the number GM lists on its SEC filings; it is not a customer service line
• Hearing or speech impaired: dial 711 for Telecommunications Relay Service, then any brand number

Customer Service and Support Channels

For most owners, the fastest route is digital. Each brand site (chevrolet.com, gmc.com, buick.com, cadillac.com) has a live chat button that handles shopping questions, dealer appointments and order status without a hold queue, and the myChevrolet, myGMC, myBuick and myCadillac apps let you schedule service, check recalls by VIN, view your warranty and manage OnStar and connected-vehicle plans from your phone. Owners who sign in to their GM account can also send written support requests that are tracked with a case number — useful evidence if you later need to escalate.

Because GM sells through franchised dealers, the dealership remains the place where sales, warranty repairs and recall work actually happen; the Customer Assistance Centers coordinate with dealers but do not perform repairs. On social media, GM’s corporate accounts (@GM on X, facebook.com/GeneralMotors) focus on news, while the brand accounts respond to owner questions. One practical tip: the brand phone lines open at 8 AM Eastern on weekdays, and calling in the first hour tends to mean the shortest wait. If you are stranded or have a safety emergency in an OnStar-equipped vehicle, press the blue OnStar button or call 1-888-466-7827 — that service is staffed around the clock.

Mailing Addresses for GM and Its Brands

Written complaints get logged and routed, but only if they reach the right box. GM does not process customer correspondence at the Woodward Avenue headquarters; it directs mail to a set of Detroit post office boxes published on gm.com and on each brand’s contact page:

Chevrolet also publishes its own Customer Assistance Center box (P.O. Box 33170, Detroit) on chevrolet.com. Whichever address you use, include your VIN, the dealer name, the dates involved and any case number you were given by phone; letters without a VIN cannot be matched to a vehicle file.

Company Background

William C. “Billy” Durant, a Flint, Michigan carriage maker who had turned Buick into the country’s highest-volume automaker, founded General Motors on September 16, 1908 as a holding company for Buick, then quickly added Oldsmobile, Cadillac and Oakland (later Pontiac). Chevrolet, which Durant co-founded in 1911, joined the group in 1918. Under Alfred P. Sloan, GM pioneered the “a car for every purse and purpose” brand ladder and became the world’s largest automaker for most of the twentieth century. The company’s heritage pages tell that story in detail.

The modern General Motors Company is legally a much younger business: it was incorporated in Delaware in 2009, when the assets of the old General Motors Corporation were purchased out of bankruptcy with U.S. Treasury backing, and it returned to the New York Stock Exchange in 2010 under the ticker GM. Today GM sells vehicles under the Chevrolet, Buick, GMC and Cadillac brands in North America, plus Baojun and Wuling through its Chinese joint ventures, and owns GM Financial, its captive lender. In its annual report for 2025, GM reported about 156,000 employees worldwide (roughly 88,000 hourly and 68,000 salaried) and total worldwide vehicle sales of about 6.2 million, including joint ventures, with a 17.2% share of the U.S. market. GM also says it is Michigan’s largest automotive employer, with 38 facilities in the state, including five assembly plants.

Leadership

Mary Barra is Chair and Chief Executive Officer of General Motors. She became CEO on January 15, 2014 — the first woman to lead a global automaker — and added the Chair title in January 2016; she started at GM as a co-op student in 1980. Because the company is a Delaware corporation headquartered in Michigan, its corporate registration lives in two places: our Delaware business search guide explains how to look up the parent entity, and the Michigan business search guide covers GM’s Michigan subsidiaries and foreign-corporation registration.

Key Office Locations

The downtown Detroit headquarters holds executive offices and corporate staff, but the technical heart of GM is the Global Technical Center in Warren, Michigan, the Eero Saarinen-designed campus where design, engineering and vehicle development are concentrated (the new Hudson’s Detroit interiors were styled to echo it). Also in Michigan are the Milford Proving Ground and Factory ZERO, the Detroit-Hamtramck plant rebuilt for electric trucks. GM Financial is based in Fort Worth, Texas. According to the 2025 annual report, GM has manufacturing, assembly, distribution, office or warehousing operations in 33 countries, with its major facilities outside the United States in Canada and Mexico (GM North America) and in Brazil, China and South Korea (GM International).

The Renaissance Center did not disappear from GM’s story when the headquarters left. GM and Bedrock formed a partnership with the city of Detroit and Wayne County to redevelop the riverfront complex, and in 2026 they have been seeking approvals for a plan that would remove two of the five towers and the podium to open the riverfront as public space, while converting the remaining towers to apartments, offices and a smaller hotel. GM has said it will contribute funding to that project.

Dealing with Customer Complaints

Start at the dealership, then call the Customer Assistance Center for your brand (Chevrolet 1-800-222-1020, GMC 1-800-462-8782, Buick 1-800-521-7300, Cadillac 1-800-333-4223). Ask for a case number and write down the date and the representative’s name; the center can open a case with the dealer, authorize goodwill repairs and escalate to a district specialist. If the case stalls, put the complaint in writing to General Motors Company, P.O. Box 33170, Detroit, MI 48232-5170, quoting the case number and VIN — a letter creates a paper trail that phone calls do not.

For anything that involves safety — a defect that could cause a crash, injury or fire, or a recall repair a dealer cannot complete — also file a report with the National Highway Traffic Safety Administration at nhtsa.gov or by calling the Vehicle Safety Hotline at 1-888-327-4236. NHTSA complaints are public, feed directly into defect investigations and recall decisions, and the agency has ordered GM to recall millions of vehicles over the years. For a vehicle that keeps failing under warranty, your state’s lemon law is the strongest remedy: most states require the manufacturer to replace or repurchase a new vehicle after a set number of unsuccessful repair attempts or days out of service, and GM’s warranty booklet describes the third-party dispute resolution program it participates in. Small-claims court remains the fallback for money disputes below your state’s limit.

Summary

GM headquarters is now 1240 Woodward Avenue, Detroit, MI 48265 — the Hudson’s Detroit complex — after the company’s January 2026 move out of the Renaissance Center. For anything involving your vehicle, skip the corporate office and use the brand lines: Chevrolet 1-800-222-1020, GMC 1-800-462-8782, Buick 1-800-521-7300, Cadillac 1-800-333-4223, or OnStar at 1-888-466-7827, and escalate in writing to P.O. Box 33170, Detroit, MI 48232-5170 or to NHTSA when safety is involved. Looking for another company’s corporate contacts? Browse our other headquarters guides.

Frequently Asked Questions

Where is GM’s headquarters located?

General Motors is headquartered at 1240 Woodward Avenue, Detroit, MI 48265, in the Hudson’s Detroit office building in downtown Detroit, Michigan.

Did GM move out of the Renaissance Center?

Yes. GM relocated its global headquarters from 300 Renaissance Center to Hudson’s Detroit on Woodward Avenue in January 2026, under an initial 15-year lease. GM and Bedrock are now pursuing a redevelopment plan for the Renaissance Center site.

What is the General Motors customer service phone number?

GM handles customer service by brand: Chevrolet 1-800-222-1020, GMC 1-800-462-8782, Buick 1-800-521-7300 and Cadillac 1-800-333-4223, all open Monday through Saturday, 8 AM to 9 PM Eastern. OnStar is 1-888-466-7827.

How do I contact the GM corporate office?

Write to General Motors Company, P.O. Box 33170, Detroit, MI 48232-5170, the general-inquiry address published on gm.com. The corporate switchboard at (313) 667-1500 reaches the executive offices but does not handle vehicle complaints.

Who is the CEO of General Motors?

Mary Barra is Chair and Chief Executive Officer of General Motors. She has been CEO since January 2014 and Chair since January 2016.

Who owns General Motors?

General Motors Company is a publicly traded Delaware corporation listed on the New York Stock Exchange under the ticker GM. The U.S. Treasury sold the last of its post-bankruptcy stake in 2013, so the company is owned by public shareholders, largely institutional investors.