freightliner fuel cap | eBay Freightliner Fuel Cap (Locking w/ Keys) 03-37017-002. Brand New. $93. Buy It Now. Free Shipping. VELVAC 600149 FEMALE FUEL TANK CAP 03-37017-002 FREIGHTLINER. Brand New. Car & Truck Fuel Filters for Freightliner. Feedback. Leave feedback about your eBay search experience - opens in new window or tab. Additional site navigation. About Amazon: freightliner fuel cap Amazon: freightliner fuel cap. Skip to main content. Filter results by your vehicle: Enter a new vehicle to add it to Your Garage and filter the results below. Enter a new vehicle 2 Freightliner Cascadia 1/4 Quarter Turn Locking Diesel Fuel Gas Caps. 3.9 out of 5 stars 36.