Need help with a GM Rewards Mastercard payment, declined transaction, lost card, unauthorized charge, account login or missing rewards points? The correct contact depends on whether the problem involves the Barclays credit-card account or the separate GM Rewards program.
GM Rewards Mastercard Customer Service Contacts
- GM Rewards Mastercard Account Support: 1-800-261-4569
- GM Rewards Member Support: 1-844-764-2665
- GM Rewards Member Support Hours: Monday–Saturday, 9 a.m.–8 p.m. Eastern Time
- Barclays GM Rewards Mastercard Page: GM Rewards Mastercard
- Barclays Contact Page: Barclays Credit Card Support
- Barclays Account Website: BarclaysUS.com
- GM Rewards Account and Points Help: Manage GM Rewards
- GM Rewards Mastercard Information: GM Mastercard Support
- GM Card and Rewards Login: GMCard.com
The card is issued by Barclays Bank Delaware, while General Motors administers the GM Rewards program. Mastercard supplies the payment network.
Choose Barclays or GM Rewards Support
Contact Barclays For:
- Payments, payment posting and account balances
- Statements, interest charges, fees and credit limits
- A declined transaction or blocked card
- A lost, stolen or damaged GM Rewards Mastercard
- Unauthorized transactions, fraud alerts and billing disputes
- Account access through the Barclays website or mobile app
Contact GM Rewards For:
- A missing GM Rewards points balance
- Questions about earning or redeeming points
- Linking the Mastercard to a GM Rewards Member Account
- Merging more than one GM Rewards Member Account
- Finding a GM Rewards Member number
- Using points toward eligible GM products, services or financial-account balances
- Accessing the Rewards Programs dashboard in GM My Account
GM Mastercard Issuer Change
The current GM Rewards Mastercard launched with Barclays in 2025. Existing consumer cardmembers received replacement Barclays cards during the transition from the prior Marcus by Goldman Sachs program.
Older GM Mastercard phone numbers, payment addresses, account portals and issuer information may no longer work. Do not mail a credit-card payment to GM Financial or a former card issuer merely because an old directory lists that address. Use the payment instructions on the current Barclays statement or authenticated Barclays account.
GM Financial is a separate company handling eligible GM vehicle loans and leases. It is not the issuer of the GM Rewards Mastercard.
Information To Gather Before Contacting Support
- The last four digits of the GM Rewards Mastercard
- The cardholder name and billing ZIP Code
- The date, amount and merchant name for the transaction involved
- The statement date and payment confirmation number
- The GM Rewards Member number, when the issue involves points
- The email address used for both Barclays and GM Rewards
- Previous support case numbers and promised follow-up dates
Lost or Stolen GM Rewards Mastercard
If the card is missing, lock or report it through the Barclays mobile app when possible and call 1-800-261-4569 promptly. Review recent transactions and tell Barclays about anything you do not recognize.
Do not wait for additional unauthorized charges. Review any mobile wallet containing the card and save the case number and replacement instructions.
Unauthorized Transactions and Billing Disputes
Contact Barclays promptly if a transaction is unfamiliar, duplicated, charged for the wrong amount or connected to merchandise or services that were not provided as agreed. Use the number on the back of the card or the GM-specific number above.
- Record the merchant name, transaction date and amount.
- Ask other authorized card users whether they recognize the purchase.
- Contact the merchant when the issue is a billing error that the merchant may correct.
- Contact Barclays when the charge is unauthorized or the merchant does not resolve it.
- Ask whether the card should be locked or replaced.
- Save dispute confirmations, receipts and correspondence.
- Respond to Barclays requests for additional information by the stated deadline.
Dispute procedures and deadlines depend on the type of transaction, account agreement and applicable law. Act promptly and rely on the current statement and Barclays instructions. This page is informational and is not financial or legal advice.
Declined GM Rewards Mastercard
A transaction may be declined because of a fraud alert, account restriction, credit availability, incorrect card information, merchant processing problem or card replacement. Barclays controls card-account approvals and restrictions.
Check the Barclays app for an alert, confirm that the card is active and verify that the merchant entered the information correctly. If the reason is not clear, call Barclays. Do not repeatedly submit a transaction after a fraud warning without first checking the account.
Payments, Statements and Account Access
Use the Barclays website or mobile app to view statements, make payments and manage the credit-card account. Follow the payment address and instructions shown on the current statement if paying by mail.
For a missing payment, have the date, amount and bank confirmation ready. Confirm its status before sending a duplicate payment.
If the account login does not work, use Barclays’ password-reset and account-recovery tools. Avoid opening a second account simply because an email address or username is not recognized.
Missing GM Rewards Points
GM’s support information says points earned through GM Rewards Mastercard spending normally appear after the card statement is issued. GM Rewards points are viewed in the Rewards Programs dashboard in GM My Account, while the credit-card statement and payment account remain with Barclays.
If points are missing:
- Confirm that the Barclays statement containing the purchase has closed.
- Verify that the email address on the Barclays card matches the GM My Account email.
- Sign in to GM My Account and review the Rewards Programs dashboard.
- Keep the purchase date, merchant and statement available.
- Contact GM Rewards at 1-844-764-2665 or use the chat widget.
For a disagreement involving whether a card purchase qualifies to earn points, start with the number on the back of the card. For the points balance, account linking or redemption, use GM Rewards support.
How To Escalate an Unresolved Complaint
- Contact the correct department—Barclays for the card account or GM for rewards.
- Request and save the support case number.
- Write down the date, representative and promised resolution.
- Ask for supervisor review when the first contact does not resolve the problem.
- Send documents only through the secure method Barclays or GM provides.
- For a serious unresolved credit-card servicing issue, review the formal complaint information provided by the Consumer Financial Protection Bureau or another appropriate regulator.
GM Mastercard Reviews and Complaints
At the time this page was reviewed, CustomerServiceNumbers.com displayed a 2.0 out of 5-star rating based on two reviews.
- September 29, 2015 — 3 stars: The reviewer said the GM Mastercard could not be used and asked why.
- August 9, 2014 — 1 star: A longtime Capital One GM Mastercard customer described a declined purchase while the customer’s spouse was traveling, a lengthy delay at the store and frustration after being told that travel notice was required.
Both reviews predate the 2025 Barclays program and concern legacy GM Mastercard servicing. They should not be treated as reviews of the current Barclays GM Rewards Mastercard. There are too few current reviews to identify present-day Barclays complaint trends.
GM Rewards Mastercard Frequently Asked Questions
What is the GM Rewards Mastercard customer-service number?
Barclays lists 1-800-261-4569 for GM Rewards Mastercard account support. Cardholders can also use the number printed on the back of the current card.
Who issues the GM Rewards Mastercard?
The GM Rewards Mastercard is issued by Barclays Bank Delaware. General Motors operates the GM Rewards program.
What is the GM Rewards points support number?
GM Rewards Member Support can be reached at 1-844-764-2665, Monday through Saturday from 9 a.m. to 8 p.m. Eastern Time.
Should I call GM Financial about the credit card?
No. GM Financial handles vehicle financing rather than GM Rewards Mastercard credit-card accounts. Contact Barclays for card billing and account support.
Why are my GM Rewards points missing?
The statement may not have closed, the card and GM accounts may use different email addresses or the Mastercard may not be linked to the intended GM Rewards account. Review the GM Rewards dashboard and contact GM Rewards support if the points remain missing.
Can CustomerServiceNumbers.com access my card account?
No. CustomerServiceNumbers.com is an independent information and review website. It cannot view transactions, accept payments, unlock cards, replace cards, open disputes, change account information or award GM Rewards points.
Related Customer Service Pages
- Barclays Customer Service
- Mastercard Customer Service
- General Motors Customer Service
- Capital One Customer Service
- Chase Customer Service
- Discover Card Customer Service
Customer Service Numbers Disclaimer
CustomerServiceNumbers.com is not associated with General Motors, GM Rewards, Barclays Bank Delaware, Mastercard, GM Financial, Goldman Sachs, Capital One or another current or former GM card provider. Contact information is provided for informational and review purposes. Credit-card terms, rewards rules, telephone numbers and support routes can change. Verify account-specific information through Barclays, GM Rewards and the documents connected to the account.
