There is a truck I wish to buy, but the rear left door doesn't shut completely. It is missing the rear left spacer on the part of the lock that is on the truck. I unscrewed the two screws that were there to get a look at it, and something (I am going to guess it was the nuts to hold the screws) fell and I heard them clink. I was wondering how to get into that area of the truck to get them out. I looked around and the only way I could see would be to take of a lot of the vinyl coverings. Is there another way or is this the right direction to take?

 

You are pretty much correct. You have to pull the interior trim to get to the access holes and then hope you can get a magnet down to where the part(s) fell. A mechanics magnet will help greatly in finding the lost parts.