If your van is like mine it will have some protection between the doors/drawers and the framework. This is to minimise damage between them as they all move about and rub when driving.
Mine was fitted with self-adhesive dimples or dots. The problem with these is they walk (migrate) over time and eventually fall off with rubbing damage done before you notice it. Fitting multiple dots slowed the process but it still failed.
My never-fail solution is to squeeze on a small bead of silicone then when half-cured slice it to thickness with a sharp blade. 1 to 2 mm is good but your gaps will vary according to furniture fitment quality.
The old useless dots...
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The new white silicone. Clear would be better but I only had white...
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