Do you have to jack it up change the spark plug wires a 1999 Chevrolet venture?
You don't *have* to jack up a 1999 Chevrolet Venture to change the spark plug wires, but it's highly recommended. Working under the vehicle while it's on jack stands provides significantly better access, better working posture, and is much safer than working on the ground. While you might be able to reach some of the wires from above, getting to all of them comfortably and safely will be much easier with the vehicle raised.