خاص لشركة GMC


Your satisfaction is our priority. If you have questions concerning your medium duty trucks that can't be handled by your selling or servicing dealer, contact the Medium Duty Truck Customer Assistance Center by visiting the Website or calling the toll-free number below.
1-800-862-4389 (Select prompt #3 for Customer Assistance)

Mailing Address
P.O. Box 44947
Detroit, MI 48244