How to Replace the Ignition Switch on a Chevrolet Express Every time you turn the ignition key on your Chevy Express van, you access the ignition switch to energize the starter motor. Also, the switch closes circuits for the operation of many other electrical components on your Express van. Chevrolet Express 2500 Ignition Starter Switch | Advance Advance Auto Parts has 14 different Ignition Starter Switch for your vehicle, ready for shipping or in-store pick up. The best part is, our Chevrolet Express 2500 Ignition Starter Switch products start from as little as $25. When it comes to your Chevrolet Express 2500, you want parts and products from only trusted brands.