Hi gm vanners,suvers and trucks

i am retired (ss) but love vending at swap meets and car shows. I have a 2004 envoy and 2003 savana.

Recently i noticed that the lug nut wheel covers (that cover the lug nuts) do not tighten. My question is "are they suppose to torque tighten or not?" ... this is on the savana.

Anyone have the same problem?