Phone:
1-866-HUMMER6
1-866-486-6376
Email:
Mail:
HUMMER Customer Assistance Center
PO Box 33177
Detroit, MI 48232-5177
Online chat:
Click here to start an online chat with a representative
1-866-HUMMER6
1-866-486-6376
HUMMER Customer Assistance Center
PO Box 33177
Detroit, MI 48232-5177
Click here to start an online chat with a representative