As long as he is the 2nd owner it will be covered,not sure on lenght for 01 but for 98 and 00 the original warranty
was 10yr 120,000 the 2nd owner gets 1/2 of that or 5yr and
60,000 we have had warranty worked done on both of ours
no ? asked.
The dealer will know how many owners the vehicle has been registered under when they run the vin.

One note..Isuzu does not cover a rental vehicle for warranty work <img src="/forums/images/graemlins/zombie.gif" alt="" /> some dealers have been nice to folks though........but plan on walking if you haveto go anywhere.
It should take them less than 2 hrs to fix it.

Let them know in advance to make sure they have the gaskets in stock.
Goodluck

Bansil