Please see our list of vehicles that we have tested here. Most vehicles are accessible, but vehicles do vary greatly. We have videos showing difficult-to-access vehicles like some passenger cars and pickup trucks, along with tips and tricks. Cars and trucks are much easier when you lubricate the provided access line and the provided guide tube. We have found some vehicles with screens in them. It is always quite random. Usually you get caught on a metal edge. With careful manipulation of the outer guide tube, this can be overcome. It is tricky, but achievable. One suggestion before buying our product is to buy a ¼ inch refrigerator water supply line and try that in your vehicle. It typical takes about 6’ of line. If you can get that line into your vehicle and reach gas, the GasTapper™ will work for you.