Explanations:
1. Jeep Wrangler wheels have a lug pattern of 5 on 5 inches, while Chevy G20 vans have a lug pattern of 6 on 5.5 inches.
2. This means that the bolt holes on the Jeep Wrangler wheels are located in a different arrangement than the bolt holes on the Chevy G20 van, so the wheels won't fit together.