2008 Cadillac CTS Owner's Manual - Page 290

Filling the Tank {CAUTION: Fuel vapor burns violently and a fuel fire can cause bad injuries. To help avoid injuries to you and others, read and follow all the instructions on the pump island. Turn off your engine when you are refueling. Do not smoke if you are near fuel or refueling your vehicle. Do not use cellular phones. Keep sparks, flames, and smoking materials away from fuel. Do not leave the fuel pump unattended when refueling your vehicle. This is against the law in some places. Do not re-enter the vehicle while pumping fuel. Keep children away from the fuel pump; never let children pump fuel. The fuel cap is behind a hinged fuel door on the passenger's side of the vehicle. The fuel door is opened by pushing in on the rear edge until the door pops out. 5-8