There isn't a "standard" dump truck.. they could be anything from a 1 ton pickup up to 70+ ton off-highway vehicles. For a Class 7 or Class 8 truck for vocational work, most will use a 10 lug setup.
Jack it up and remove the lug nuts.
5 lug nuts on
There are 6 on standard suburban
Five
5
5
5
5
5 is average.
5
15
8