You can try calling this number.

Isuzu Owner Relations Department

(800)255-6727
6:00 a.m. to 5:00 p.m. (PST)
Monday to Friday


I gave them a call to determine the same info about what the warranty would be before purchasing my VX about a month ago. All I had to do was supply the VIN#.

Be prepared for a possibly long wait on hold though...