Customer Care: 800-521-7300
Hours: Monday–Saturday: 8 a.m. to 9 p.m. (EST), Sunday: Closed

Mail:
Buick Customer Assistance Center
P.O. Box 33172
Detroit, MI 48232-5172

X (Twitter): @Buick

Customer Care: 800-333-4223
Hours: Monday–Friday: 8 a.m. to 9 p.m. ET, Saturday: 10 a.m. to 2 p.m. ET, Sunday: Closed

Mail:
Cadillac Customer Assistance Center
P. O. Box 33169
Detroit, MI 48232-5169

X (Twitter): @Cadillac

Customer Care: 800-222-1020
Hours: Monday – Saturday: 8 a.m. – 9 p.m. ET, Sunday: Closed

Mail:
Chevrolet Customer Assistance Center
P.O. Box 33170
Detroit, MI 48323-5136

X (Twitter): @Chevrolet

Customer Care: 800-777-3600
Hours: This service is available 24/7

Mail:
FCA US LLC
P.O. Box 21-8007
Auburn Hills, MI 48321-8007

X (Twitter): @ChryslerCares

Customer Care: 800-423-6343
Hours: Monday-Friday, 8 a.m. - 9 p.m. and Saturday, 9 a.m. - 5 p.m.

Mail:
Dodge Customer Care
PO Box 21-8004
Auburn Hills MI 48321-8004

X (Twitter): @DodgeCares

Customer Care: 888-242-6342
Hours: Monday-Friday, 8 a.m. - 9 p.m. and Saturday, 9 a.m. - 5 p.m.

Mail:
FIAT USA Customer Care
PO Box 21-8004
Auburn Hills MI 48321-8004

X (Twitter): @FiatCares

Customer Care: 800-462-8782
Hours: Monday - Saturday: 8 a.m. to 9 p.m. (EST), Sunday: Closed

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

X (Twitter): @GMC

Customer Care: 877-426-5337
Hours: Monday-Friday, 8 a.m. - 9 p.m., and Saturday, 9 a.m. - 5 p.m.

Mail:
FCA US LLC
P.O. Box 21-8007
Auburn Hills, MI 48321-8007

X (Twitter): @JeepCares

Customer Care: 800-222-5500
Hours: Monday-Friday 5:00 a.m. - 6:00 p.m. PST, Saturday 7:00 a.m. - 3:00 p.m. PST

Mail:
Customer Experience Center
PO Box 19734
Irvine, CA 92623-9734

X (Twitter): @MazdaUSA

Customer Care: 888-648-7820
Hours: Monday - Friday 7 a.m. to 4 p.m. (CDT)

Mail:
Mitsubishi Motors North America, Inc.
PO Box 689040
Franklin, TN 37068

X (Twitter): @mitsucars

Customer Care: 866-726-4636
Hours: Monday-Friday, 8 a.m. - 9 p.m., and Saturday, 9 a.m. - 5 p.m.

Mail:
FCA US LLC
P.O. Box 21-8007
Auburn Hills, MI 48321-8007

X (Twitter): @RamCares

Customer Care: 800-822-8987
Hours: Monday-Friday, 8 a.m. - 9 p.m., and Saturday, 9 a.m. - 5 p.m.

Mail:
Volkswagen Customer CARE
3800 Hamlin Road
Auburn Hills, MI 48326-2829

X (Twitter): @VWCares