2007 Dodge Ram 1500 Pickup Owner's Manual - Page 384

384 STARTING AND OPERATING • Guard against carbon monoxide with proper maintenance. Have the exhaust system inspected every time the vehicle is raised. Have any abnormal conditions repaired promptly. Until repaired, drive with all side windows fully open. • Keep the liftgate closed when driving your vehicle to prevent carbon monoxide and other poisonous exhaust gases from entering the vehicle. ADDING FUEL Adding Fuel (Gas Engines) The fuel tank filler tube has a restricting door about 2 inches (50 mm) inside the opening. If using a portable fuel container, it should have a flexible nozzle long enough to force open the restricting door. CAUTION! Damage to the fuel system or emission control system could result from using an improper fuel tank filler tube cap (gas cap). A poorly fitting cap could let impurities into the fuel system. Also a poorly fitted after-market cap can cause the MIL (Malfunction Indicator Light) to illuminate, due to fuel vapors escaping from the system. CAUTION! A poorly fitting gas cap may cause the Malfunction Indicator Light to turn on.