GMC Customer Service Number

GMC Customer Service (New Vehicle Purchase)
1 (888) 988-7267
Monday – Friday: 8 a.m. to 9 p.m. (EST)
Saturday: 9 a.m. to 6 p.m. (EST)
Sunday: Closed

Website : – Gmc.com

GM Mobility Center Number
1-800-323-9935
Monday – Friday: 8 a.m. to 8 p.m. (EST)
Saturday & Sunday: Closed

OWNER’S ASSISTANCE

Customer Relations Center Number
1-800-462-8782
Monday – Saturday: 8 a.m. to 9 p.m. (EST)
Sunday: Closed

GMC Online Owner Center Number
1-866-694-6546
Monday – Saturday: 8 a.m. to 9 p.m. (EST)
Sunday: Closed
(for questions about managing your vehicle on GMC.com)

GMC Service Bulletins
1-800-551-4123
Monday – Friday: 8 a.m. to 6 p.m. (EST)
Saturday & Sunday: Closed
(to order service bulletins about your GMC)

FINANCIAL SERVICES

Apply GM Rewards Card
BuyPower Card :  1-800-460-2845
GM Extended Family Card : 1-877-557-2622
24 hours a day, 7 days a week

Ally
Auto: 1-888-925-ALLY (2559)
Monday – Friday: 8 a.m. to 8 p.m. (EST)
Saturday: 9 a.m. to 4 p.m. (EST)
Sunday: Closed

GM Financial
1-800-284-2271
Monday – Thursday: 8 a.m. to 7 p.m. (EST)
Friday: 8 a.m. to 6 p.m. (EST)
Saturday: 8 a.m. to 3 p.m. (EST)
Sunday: Closed

US Bank
1-866-250-3147
Monday – Friday: 8 a.m. to 9 p.m. (EST)
Saturday: 9 a.m. to 7 p.m. (EST)
Sunday: Closed

CHAT WITH GMC

CHAT NOW
Monday – Friday: 8 a.m. to Midnight (EST)
Saturday: 9 a.m. to Midnight (EST)
Sunday: 11 a.m. to Midnight (EST)

Write to GMC

United States:
GMC Customer Assistance Center
P.O. Box 33172
Detroit, MI 48232-5172

Canada:
Canada – GM of Canada
1908 Colonel Sam Oshawa, Ontario
L1H 8P7, Canada
Mail Code 163-055

Reference Links –