hi rod,
i did this job on our 03 34 pilot. you will need to remove the cover to the left of the companion way. this will give you access to both upper and lower track. here is where i got ours:
https://www.boatoutfitters.com/hardw...ng-door-trucks. sorry don't remeber details on the procedure, although you might have to cut an "outlet" on upper track to get the car out w/o removing the track. the cars on upper and lower track are different.
good luck