I use:

Elite Isuzu, Inc.
645 WASHINGTON AVENUE
BELLEVILLE, NJ 07109
Phone: (973)751-2121
Fax: (973)751-3573
http://isuzu.com/dw/websites?dealerCode=28040

I have only been there twice and I have not had them address any problems. I am not used to not having a loaner. Regular service was about $56. I have not had my 15,000 mile service yet.