Yes, it is generally possible to make extra payments towards a GMAC auto loan. Many borrowers take advantage of this option to reduce the overall interest they will pay over the life of the loan and to pay off the loan more quickly. However, it is important to check the specific terms and conditions of your loan agreement to confirm whether there are any restrictions on making extra payments. Some loans may have conditions related to prepayment penalties or minimum payment requirements. Additionally, it is wise to determine how the extra payments will be applied—whether they will go towards the principal balance or future payments. For detailed information regarding your specific loan, including any potential fees or benefits, it is advisable to review the current web page provided by GMAC to ensure you have the most accurate and relevant details for your situation.