GMC is a General Motors vehicle brand known for trucks, SUVs and commercial vehicles. GMC does not operate as a separately headquartered public company, so corporate matters ultimately route through General Motors Company in Detroit, Michigan.
This page provides the current GMC corporate office and headquarters information, GM corporate phone number, GMC customer-service number, support and complaint options, mailing address, roadside assistance, warranty and repair escalation resources, careers information and related corporate-office contacts.
Important headquarters update: Older GMC corporate listings show 300 Renaissance Center, Detroit and 313-556-5000. General Motors has moved its principal executive offices. The current GM headquarters address is 1240 Woodward Avenue, Detroit, MI 48265, and the current corporate phone number listed in GM filings is 313-667-1500.
GMC Corporate Office Headquarters and Customer Service
- Brand: GMC
- Parent Company: General Motors Company
- GMC / GM Headquarters Address: 1240 Woodward Avenue, Detroit, MI 48265, USA
- GM Corporate Office Phone Number: 313-667-1500
- GMC Customer Service / General Assistance: 1-800-462-8782
- GMC Customer Service Hours: Monday-Saturday, 8 a.m.-9 p.m. Eastern Time; Sunday closed
- GMC Customer Assistance Mailing Address: GMC Customer Assistance Center, P.O. Box 33172, Detroit, MI 48232-5172
- GMC Support Request: Submit a GMC Support Request
- GMC Support Center: GMC Owner Support
- GMC Dealer Locator: Find a GMC Dealer
- GMC Roadside Assistance: 1-888-881-3302
- GMC EV Roadside Assistance: 1-844-515-1418
- GM Warranty, Repair & Lemon Law Help: 1-866-636-2273
- General GM Correspondence: General Motors Company, P.O. Box 33170, Detroit, MI 48232-5170
- GM Careers: General Motors Careers
- GMC Website: GMC.com
Where Is GMC Headquarters?
GMC is a General Motors brand and does not publish a separate standalone GMC headquarters. The current General Motors principal executive office is:
General Motors Company
1240 Woodward Avenue
Detroit, MI 48265
USA
People searching for GMC headquarters, GMC HQ, GMC corporate headquarters, the GMC corporate office or the GMC manufacturer address are generally looking for General Motors headquarters in Detroit.
The current corporate telephone number associated with GM’s principal executive offices is 313-667-1500.
Is GMC Still Headquartered at the Renaissance Center?
No. General Motors previously used 300 Renaissance Center, Detroit as its principal executive-office address. That address continues to appear in older GMC and GM directories, graphics and search results.
GM’s current corporate filings identify 1240 Woodward Avenue as its principal executive offices. The company has moved its global headquarters operations to the Hudson’s Detroit development on Woodward Avenue.
The former corporate number 313-556-5000 was associated with the Renaissance Center headquarters. Current GM filings list 313-667-1500.
What Is the GMC Corporate Office Phone Number?
Because GMC is a General Motors brand, there are two important telephone numbers depending on the reason for calling:
- General Motors corporate office: 313-667-1500
- GMC customer service and vehicle assistance: 1-800-462-8782
The GM corporate number is a headquarters contact. Most vehicle owners should start with GMC Customer Assistance rather than calling the corporate office.
GMC Customer Service Phone Number and Hours
GMC’s current general customer-service number is 1-800-462-8782.
Current hours are:
- Monday-Saturday: 8 a.m.-9 p.m. Eastern Time
- Sunday: Closed
The GMC call center handles questions and general feedback involving GMC vehicles, GMC accounts, new vehicles and other ownership matters.
Customers can also use GMC’s online chat and support-request system. GMC states that an advisor will generally contact a customer within one business day after an online support request is submitted.
Does GMC Have a Customer Service Email Address?
GMC does not currently publish a general direct customer-service email address on its primary Contact Us page.
Customers searching for a GMC email address, GMC customer-service email address or GMC complaint email should use the official GMC Support Request instead of relying on an unverified email address from a third-party website.
GMC also offers live chat through GMC.com for faster assistance with topics such as vehicle shopping, dealer appointments and order status.
GMC Customer Assistance Mailing Address
GMC currently directs mailed vehicle questions, comments and concerns to:
GMC Customer Assistance Center
P.O. Box 33172
Detroit, MI 48232-5172
USA
This customer-assistance mailing address is generally more appropriate for a written GMC vehicle complaint than sending correspondence directly to GM’s executive-office street address.
For general General Motors correspondence not specific to GMC Customer Assistance, GM separately publishes:
General Motors Company
P.O. Box 33170
Detroit, MI 48232-5170
How to Escalate a GMC Complaint
The most effective escalation path depends on whether the problem involves a dealership, repair, warranty, recall, vehicle order, parts availability, account issue or another concern.
- Start with the GMC dealership involved: Speak with the service advisor, service manager, sales manager or other department responsible for the issue.
- Request the general manager when necessary: If department management cannot resolve the concern, ask for the dealership’s general manager.
- Document the issue: Keep repair orders, estimates, invoices, warranty decisions, photographs, emails and relevant messages.
- Contact GMC Customer Assistance: Call 1-800-462-8782 or submit an official support request.
- Ask for a case number: Keep the GMC or GM case number and the date of each contact.
- State the requested resolution: Explain whether you want a repair, warranty review, reimbursement consideration, parts assistance, written explanation or another outcome.
- Use GM’s warranty and repair escalation route when appropriate: For ongoing warranty or repair problems, call 1-866-636-2273.
- Use corporate correspondence when appropriate: Significant unresolved corporate matters can ultimately be directed through General Motors at its current Detroit headquarters.
GMC Warranty and Repeat-Repair Complaints
Warranty complaints can involve denied coverage, repeated repairs, diagnostic disputes, unavailable parts, delays, software issues or disagreement over whether a failure is covered by the manufacturer’s limited warranty.
For an unresolved repair or warranty concern, keep:
- The vehicle year and model
- Mileage
- Repair orders
- Dealership name and location
- Dates the vehicle was unavailable
- Diagnosis and repair recommendations
- Warranty or coverage decision
- GMC or GM case number
General Motors currently provides a dedicated Warranty, Repair & Lemon Law Help line at 1-866-636-2273, Monday through Saturday from 8 a.m. to 9 p.m. Eastern Time.
Consumer warranty and vehicle-repurchase rights vary by state, vehicle age, mileage, repair history and other factors.
GMC Parts Availability Complaints
Parts delays can be particularly frustrating when a GMC vehicle cannot be driven or repaired. A dealer normally places and manages the repair-parts order, while General Motors and its supply network may control availability and distribution.
If a needed part is backordered:
- Ask the dealer for the exact part number.
- Ask whether the order has been marked urgent or escalated.
- Request an estimated availability date when one exists.
- Keep documentation showing how long the vehicle has been out of service.
- Open a case with GMC Customer Assistance.
- Ask whether rental, transportation or other assistance may apply to the specific situation.
Do not purchase expensive replacement components from an unknown seller solely because a part is difficult to find. Verify compatibility and warranty implications with a qualified GMC dealer or repair professional.
GMC Recall and Vehicle Safety Complaints
GMC owners can check recall information through the official GMC Support Center and the National Highway Traffic Safety Administration.
The federal NHTSA recall lookup is available at NHTSA.gov/Recalls. NHTSA can also be reached at 1-888-327-4236.
If a GMC recall remedy is delayed or unavailable, ask the dealer to document the status and contact GMC Customer Assistance. A suspected safety defect that is not already covered by a recall may also be reported to NHTSA.
For an immediate safety concern, follow the manufacturer’s safety instructions and avoid driving the vehicle when continued operation could be unsafe.
GMC Roadside Assistance
GMC Roadside Assistance can currently be reached at 1-888-881-3302. GMC lists a separate EV roadside number at 1-844-515-1418.
Roadside services can include eligible towing, vehicle-unlock assistance, flat-tire changes, battery jump-starts and emergency fuel delivery.
Eligible owners with connected services may also be able to request Roadside Assistance through the myGMC app or the vehicle’s OnStar system.
GMC Account and myGMC Support
The GMC Support Center includes assistance for General Motors accounts and the myGMC app. Account features can include vehicle information, service history, diagnostics, connected services and other ownership tools.
For general account problems, start with 1-800-462-8782, the GMC Support Center or the support-request form.
Do not provide account passwords or one-time authentication codes to someone who contacts you unexpectedly claiming to represent GMC or General Motors.
GMC Human Resources and Careers
Because GMC is a General Motors brand, corporate employment and Human Resources functions are managed through General Motors rather than through a separately published GMC HR department.
A dedicated public GMC Human Resources phone number for general job applicants is not published on GMC’s customer-support pages.
Job seekers should use the official General Motors Careers website for current positions in engineering, manufacturing, software, design, finance, marketing, corporate operations and other areas.
About GMC
GMC is one of General Motors’ four primary U.S. vehicle brands, alongside Chevrolet, Buick and Cadillac.
The GMC lineup focuses primarily on trucks, SUVs, crossovers and commercial vehicles. Current GMC nameplates include Sierra, Canyon, Yukon, Terrain and Acadia, along with GMC HUMMER EV and other electric-vehicle offerings.
GMC vehicles are sold and serviced through franchised dealerships. The individual dealership and General Motors can have different responsibilities: dealerships generally manage sales transactions, local pricing, service scheduling and day-to-day repair operations, while GM manages manufacturer warranties, recalls, technical programs, parts systems and brand-level customer assistance.
Who Owns GMC?
GMC is owned by General Motors Company, a publicly traded automotive manufacturer listed on the New York Stock Exchange under the ticker symbol GM.
General Motors’ U.S. vehicle brands include GMC, Chevrolet, Buick and Cadillac.
For parent-company headquarters and corporate information, see the General Motors Corporate Office page.
General Motors Leadership
Mary T. Barra is Chair and Chief Executive Officer of General Motors. She has served as GM’s CEO since 2014 and Chair of the Board since 2016.
Because GMC operates as a General Motors brand rather than a separate publicly traded company, corporate governance and executive leadership ultimately reside with General Motors.
GMC Competitors and Related Corporate Offices
GMC competes primarily with truck and SUV brands from other automotive manufacturers. Competition varies by vehicle segment, with full-size trucks, heavy-duty pickups, midsize trucks, large SUVs and premium SUVs each having different competitors.
- Ford Corporate Office — competing trucks and SUVs including the F-Series, Ranger and Expedition
- Toyota Corporate Office — trucks and SUVs including Tundra, Tacoma and Sequoia
- Nissan Corporate Office — trucks, SUVs and crossovers
Related GM brand: Chevrolet Corporate Office is a sister General Motors brand rather than an independently owned corporate competitor.
GMC Reviews on CorporateOfficeHeadquarters.com
There are currently two visible reader reviews on the GMC CorporateOfficeHeadquarters.com page.
A May 2025 reviewer describes spending more than two hours dealing with customer service over an order and a $500 charge, along with difficulty redeeming GM rewards points through the app. The reviewer describes being a longtime GMC vehicle owner and expresses frustration with the support experience.
A December 2022 review concerns difficulty locating a replacement transmission control module for a 2011 GMC 3500HD. The reviewer expresses frustration about parts availability for an older GMC truck.
With only two visible reviews, there is not enough firsthand COH feedback to establish broad positive or negative customer-service trends across the entire GMC brand.
Frequently Asked Questions
Where is GMC headquarters?
GMC is a General Motors brand. GM’s current principal executive offices are at 1240 Woodward Avenue, Detroit, MI 48265.
What is the GMC headquarters address?
The current corporate headquarters address associated with GMC is General Motors Company, 1240 Woodward Avenue, Detroit, Michigan 48265.
Is GMC still headquartered at 300 Renaissance Center?
No. 300 Renaissance Center was General Motors’ former headquarters address. GM’s current principal executive offices are at 1240 Woodward Avenue in Detroit.
What is the GMC corporate office phone number?
The current General Motors corporate-office phone number is 313-667-1500. GMC vehicle owners should generally call GMC Customer Assistance at 1-800-462-8782.
Is 313-556-5000 still GMC’s corporate phone number?
313-556-5000 was associated with General Motors’ former Renaissance Center headquarters. Current GM filings list 313-667-1500 at the company’s current headquarters.
What is the GMC customer service phone number?
GMC Customer Assistance can be reached at 1-800-462-8782.
What are GMC customer service hours?
GMC currently lists general assistance hours as Monday through Saturday from 8 a.m. to 9 p.m. Eastern Time. The call center is closed Sunday.
What is the GMC manufacturer phone number?
For GMC manufacturer-level vehicle assistance, call GMC Customer Assistance at 1-800-462-8782. For General Motors corporate-office matters, use 313-667-1500.
Does GMC have a customer service email address?
GMC does not currently publish a general direct customer-service email address on its primary Contact Us page. Use the official GMC Support Request form or live chat for written online assistance.
What is the GMC complaint email?
A general public GMC complaint email is not published on the current GMC Contact Us page. Submit an official support request online instead so the complaint can be routed to the appropriate GMC advisor.
What is the GMC mailing address for complaints?
Write to GMC Customer Assistance Center, P.O. Box 33172, Detroit, MI 48232-5172.
What is GMC Roadside Assistance?
GMC Roadside Assistance can be reached at 1-888-881-3302. GMC lists 1-844-515-1418 for EV roadside assistance.
How do I complain about a GMC dealership?
Start with the dealership’s service manager, sales manager or general manager. If the issue remains unresolved or manufacturer involvement is needed, contact GMC Customer Assistance at 1-800-462-8782 and request a case number.
How do I escalate a GMC warranty or repair complaint?
Work first with the authorized dealer and GMC Customer Assistance. For an ongoing warranty or repair issue, General Motors also provides Warranty, Repair & Lemon Law Help at 1-866-636-2273.
Who owns GMC?
GMC is owned by General Motors Company.
Who is the CEO of GMC?
GMC is a General Motors brand rather than a separately headed public corporation. Mary Barra is Chair and Chief Executive Officer of General Motors.
How do I contact GMC corporate headquarters?
For a GMC vehicle issue, start with GMC Customer Assistance at 1-800-462-8782. For an appropriate corporate matter, General Motors’ current headquarters is at 1240 Woodward Avenue, Detroit, MI 48265, with corporate phone 313-667-1500.
Why Trust CorporateOfficeHeadquarters.com?
CorporateOfficeHeadquarters.com publishes headquarters addresses, corporate phone numbers, customer-support contacts, complaint-escalation information and reader reviews. This GMC page distinguishes General Motors’ current Woodward Avenue headquarters from the former Renaissance Center address and separates GM corporate contacts from GMC customer assistance, dealership support, roadside assistance and warranty escalation.
Page Update Note
This GMC page was updated on August 19, 2026, to replace the former Renaissance Center headquarters information with General Motors’ current 1240 Woodward Avenue address and 313-667-1500 corporate phone, verify GMC Customer Assistance and hours, add current online support, roadside and warranty-repair contacts, clarify that GMC does not publish a general complaint email, address current corporate-office and phone-number search queries, summarize the two visible CorporateOfficeHeadquarters.com reviews and verify relevant corporate-office links.
Disclaimer
CorporateOfficeHeadquarters.com is not affiliated with GMC, General Motors Company, GM Financial, OnStar, any GMC dealership, repair facility, lender, warranty administrator, roadside-assistance provider or government agency. This page is provided for informational, review, complaint and feedback purposes.
Corporate addresses, phone numbers, support hours, warranty coverage, recalls, parts availability, dealership operations and complaint procedures can change. Confirm vehicle-specific and time-sensitive information directly with GMC, General Motors, the dealership or the appropriate government agency.
GMC Complaints, Reviews and Feedback
Have you contacted GMC Customer Assistance, a GMC dealership, General Motors corporate headquarters, Roadside Assistance or GM’s warranty and repair support team? Share a firsthand review below. Useful feedback may address vehicle reliability, repairs, parts availability, warranty service, recalls, dealership communication, GM Rewards, customer service or corporate complaint handling.
Include the GMC model, approximate model year, dealership city, general problem, support route used and how GMC or the dealership responded. Do not publish complete VINs, case numbers, payment information, account credentials, home addresses or other sensitive personal information.