General Motors, commonly called GM, is the parent company of Chevrolet, Buick, GMC, and Cadillac. If you need GM customer service for a vehicle issue, recall, warranty repair, dealer complaint, GM Financial account, OnStar support, reviews, or complaints, use the contact options below to reach the correct General Motors support route.

GM Customer Service Phone Numbers

Chevrolet Customer Assistance: 1-800-222-1020
Buick Customer Assistance: 1-800-521-7300
Cadillac Customer Assistance: 1-800-458-8006
GMC Customer Assistance: 1-800-462-8782
GM Warranty, Repair, and Lemon Law Help: 1-866-636-2273
OnStar Support: 1-888-466-7827 / 1-888-4ONSTAR
GM Financial Customer Service: 1-800-284-2271
GM Consumer Privacy: 1-866-MYPRIVACY / 1-866-697-7482

Best Ways to Contact General Motors

The best GM support route depends on the brand, issue type, and whether the concern involves a dealer, warranty repair, recall, financing, OnStar, or a privacy request.

Chevrolet vehicle issue: Call Chevrolet Customer Assistance at 1-800-222-1020.
Buick vehicle issue: Call Buick Customer Assistance at 1-800-521-7300.
Cadillac vehicle issue: Call Cadillac Customer Assistance at 1-800-458-8006.
GMC vehicle issue: Call GMC Customer Assistance at 1-800-462-8782.
Ongoing warranty repair or lemon-law-style concern: Call GM Warranty, Repair, and Lemon Law Help at 1-866-636-2273.

Loan, lease, payoff, title, or payment issue: Contact GM Financial at 1-800-284-2271.
Connected services, emergency services, or vehicle app help: Contact OnStar at 1-888-466-7827.

You can also visit the official GM Contact Us page, the GM Support Center, the GM Recall Center, the GM Warranty, Repair, and Lemon Law Help page, the GM Financial Contact page, and the OnStar Support page.

General Motors Headquarters and Mailing Address

GM Global Headquarters: Hudson’s Detroit, 1240 Woodward Avenue, Detroit, MI 48226
GM Written Correspondence: General Motors Company, P.O. Box 33170, Detroit, MI 48232-5170
Former Headquarters Note: Older listings may still show 300 Renaissance Center. GM has since moved its global headquarters to Hudson’s Detroit.

General Motors Brands

GM customer service is usually handled through the vehicle brand connected to your car, truck, SUV, EV, or account. GM’s main U.S. brands are Chevrolet, Buick, GMC, and Cadillac.

Chevrolet: Cars, trucks, SUVs, EVs, Corvette, Silverado, Tahoe, Suburban, Equinox, and related Chevrolet support
Buick: Buick SUVs, owner support, warranty, service, and account help

GMC: GMC trucks, SUVs, Sierra, Yukon, Canyon, Hummer EV, warranty, service, and owner support
Cadillac: Cadillac luxury vehicles, EVs, owner support, warranty, service, and account help

Before You Contact GM Customer Service

Having the right information ready can help GM, the dealer, or GM Financial route your case more quickly.

Your 17-character VIN
The vehicle year, make, model, and mileage
The GM brand: Chevrolet, Buick, GMC, or Cadillac
The selling dealer and servicing dealer names
Repair order numbers, appointment dates, and service invoices
Recall notice, warranty letter, or diagnostic information, if available
Photos, warning lights, error messages, or app screenshots
Your GM Financial account number, if calling about a loan or lease
Any previous case number from GM, OnStar, GM Financial, or a dealer

Common Reasons Customers Contact GM

Vehicle warranty questions or repair delays
Dealer complaints or unresolved dealership service issues
Recall notices, VIN lookup, or safety campaign questions
Repeated repair problems or lemon-law-style concerns
GM Financial payments, payoff, lease-end, title, or account questions
OnStar, connected services, myChevrolet, myBuick, myGMC, or myCadillac app support

Roadside assistance, EV roadside help, or emergency support routing
Infotainment, navigation, software update, or vehicle feature questions
My GM Rewards, account login, or profile support
Privacy, marketing preference, or vehicle data questions

Warranty, Repair, and Dealer Complaint Help

If your issue involves a repair, warranty claim, parts delay, repeated defect, or dealership service complaint, start with the dealer service manager. Ask for a written repair order and keep copies of all invoices, diagnostic notes, and communications.

If the dealer cannot resolve the issue, call the correct GM brand customer assistance number and ask to open a case. For ongoing warranty concerns or difficulty getting a vehicle repaired, GM lists a separate Warranty, Repair, and Lemon Law Help line at 1-866-636-2273.

GM Recall Support

For recalls, use the GM recall center with your VIN. A VIN lookup can help identify open safety recalls and service campaigns connected to your specific vehicle. You can also contact the customer assistance center for your GM brand if you have questions about recall parts, scheduling, repair availability, or dealer follow-up.

If a dealer says recall parts are unavailable, ask for documentation and follow up with the brand customer assistance center. Keep records of every recall-related appointment, call, and case number.

GM Financial Support

GM Financial handles many GM vehicle loans, leases, payments, payoff requests, title questions, lease-end questions, and account issues. GM Financial customer service can be reached at 1-800-284-2271.

For financing issues, have your GM Financial account number, vehicle information, payment confirmation, title or payoff documents, and any late-payment or lease-end notices ready before calling.

OnStar and Connected Services Support

OnStar and GM connected services may support safety services, emergency assistance, connected vehicle plans, remote commands, app features, navigation, diagnostics, Wi-Fi, and subscription services. For OnStar help, call 1-888-466-7827 or press the OnStar button in the vehicle when appropriate.

If your issue involves a mobile app, account login, connected service plan, remote start, diagnostics, or vehicle data, note the app name, device, operating system, vehicle model, error message, and whether the issue happens in the vehicle, app, or online account.

GM Reviews and Complaints

CustomerServiceNumbers.com currently shows a 2.0 out of 5 rating for GM based on 2 reviews. Visible reviews on this page include a 2018 Silverado eAssist complaint involving dealer follow-up and a Cadillac navigation/map update complaint involving dissatisfaction with the navigation system and update expectations.

Because this page has a small number of visible reviews, CustomerServiceNumbers.com is summarizing only the review themes currently shown on this page. New reviews may help identify additional themes involving warranty repairs, dealer service, recalls, GM Financial, OnStar, vehicle technology, customer assistance, or successful resolutions.

Safety, Privacy, and Scam Tips

Do not post your full VIN, home address, phone number, email address, driver’s license number, loan account number, lease account number, payment information, OnStar login, app password, or case number in a public review or comment.

Be cautious with fake recall notices, extended warranty robocalls, text messages claiming your vehicle warranty is expiring, or links asking for payment or personal information. Use GM.com, official GM brand sites, OnStar, GM Financial, your dealer, and official phone numbers when sharing private vehicle or account details.

Reviews and comments may be moderated for profanity, spam, and personally identifiable information. Keep your review focused on your customer service experience and avoid sharing private account details.

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Why Trust CustomerServiceNumbers.com?

CustomerServiceNumbers.com has been helping consumers find customer service contact information since 2004. We provide company contact details, support guidance, and a place for customers to share reviews, complaints, and service experiences.

Share Your GM Customer Service Experience

Have you contacted GM, Chevrolet, Buick, GMC, Cadillac, GM Financial, OnStar, a dealer, or GM warranty support about a vehicle issue, recall, repair, financing, app, or connected-services problem? Share your review below so other customers can learn from your experience.

Disclaimer

CustomerServiceNumbers.com is not affiliated with General Motors Company, Chevrolet, Buick, GMC, Cadillac, OnStar, or GM Financial. Contact information is provided for informational purposes and may change. Always verify vehicle, warranty, recall, financing, privacy, and account-specific support options through official GM websites, GM brand websites, GM Financial, OnStar, or your authorized dealer before sharing private information or making payments.

Comments are moderated for profanity, PII, and spam. Offensive words may be soft-masked (e.g., “f—”) but your meaning is preserved. See our Commenting Policy.

GM eAssist Issues

September 15, 2018

GM, I recently purchased a 2018 Silverado LTZ 4×4 with eAssist. The sales staff could not answer questions about this feature. 2 days later I bought the truck. After driving it and getting it to operating temperature the eAssist started working. Every time there is a thump or bump when it starts back up. I called the dealer and complained about that and a ignition key issue. They said if I didn’t like the truck they would find me another one without this feature. Well it has been a week and after calling them back at less 6 times and getting promises on the phone they have yet to contact me back. I have been a loyal GM customer for 50 years and would stand my ground when things were not going good for GM. Why can’t the dealer get me out of that truck. I wish they would have explained to me more about eAssist. It may be good for some but not me.

James W

I take responsibility for my mistake in buying a Cadillac

April 19, 2018

I take responsibility for my mistake in buying a Cadillac back in 2015. I had knowledge of the bad press their navigation system has but ignored it. As a retired airline pilot I have extensive experience with complex nav systems, operator error was not the issue. This problem could probably be fixed via soft ware upgrade(s). But they need to first admit the problem, fire the person responsible for it and try to fix customer relations. When I purchased a map update the sales person flat lied when I asked “is this a life long update like Garmin provides?” The answer was “yes”. I recently pulled into a parking place, the person next to me saw my Garmin and said “I thought the Cadillac came with a nav system.” My reply was I would not go so far as to call it that. I doubt they will do any thing, but if you are a prospective buyer BE AWARE. MY 2016 GMC TRUCK IS SOME BETTER BUT NOT NEAR THE QUALITY OF MY OLD GARMIN. I stand by my statement. Sincerely, Reynolds Shore

Reynolds S

General Motors Leather Deterioration Issue

April 4, 2018

General Motors, My warrantyr has expired on my 2015 2500HD LTZ Duramax at 41K miles. A small deterioration has happened in the drivers seat. No problem in my last truck until 160K miles when the leather cracked. I am Really disappointed especially with the price I paid for the truck and these leather seats. How about some help????

Bob T

GM General Motors Customer Service Phone Number, Reviews and Complaints