I believe that you have the VG30 engine, if this is true you have to remove all of the belts and to do that you must find all of the adjuster screws for the accessories that are attached to the appropiate belts and lossen the pivot bolts. once all other belts are removed you can begin replacing. my advice is to replace all the belts while you are there and save your self from the hassle of this again.
how do you change the serpentine belt on a 2001 Rodeo
Yes the 2000 passport has a timing belt as does its identical twin the Isuzu Rodeo.
diagram for timing belt Isuzu rodeo 3.2l 24valve
This is for a 1999 v6 http://www.2carpros.com/forum/1999-isuzu-rodeo-question-serpentine-belt-replacement-vt81705.html
it¨s a timing belt..
http://www.helium.com/tm/756435/isuzu-rodeo-honda-passport
Remove beltUnbolt tensioner and remove
Please show picture of how to put on belt
Chain.
It is behind the timing belt cover.
When changing the serpentine belt it is important to have a diagram. The diagram of the serpentine belt of a 2001 Isuzu Rodeo 6-cylinder can be found in its manual or a print out can be obtained at an auto part store.
loosen the 7/8 main nut on the tensioner then back off the adjuster 12mm till there is enough slack to remove the belt