Need some help? At Sentry Buick GMC in Charleston, our friendly and professional staff is ready to assist. Just fill out the form below and someone from Sentry Buick GMC will get back to you shortly. You can also call us at 888-319-8284 to get the information you need. Sentry Buick GMC is proud to be an automotive leader in our community, including Summerville, Mount Pleasant, West Ashley, Beaufort, and Holly Hill. Since opening our doors, Sentry Buick GMC has maintained our solid commitment to offering the widest selection of automobiles and exceptional financing options to our customers.