GM Parts Online offers various payment methods to accommodate customers' preferences. Typically, credit cards such as Visa, MasterCard, American Express, and Discover are accepted. Additionally, some online parts stores may also allow payments through electronic checks or debit cards with a credit card logo. In certain cases, PayPal might be an available option as well, depending on the specific policies of the supplier. It is important to note that the available payment options can vary based on the current website's offerings and policies. Therefore, it is advisable for customers to visit the GM Parts Online website's payment section to confirm which methods are currently accepted. This way, customers can select the option that best suits their needs when purchasing parts for their vehicles.