2007 Jeep Grand Cherokee Owner's Manual - Page 314
2007 Jeep Grand Cherokee Manual
Page 314 highlights
314 STARTING AND OPERATING CAUTION! Damage to the fuel system or emission control system could result from using an improper fuel cap (gas cap). A poorly fitting cap could let impurities into the fuel system. Also, a poorly fitting aftermarket cap can cause the MIL (Malfunction Indicator Light) to illuminate, due to fuel vapors escaping from the system. CAUTION! To avoid fuel spillage and overfilling, do not "top off" the fuel tank after filling. NOTE: When the fuel nozzle "clicks" or shuts off, the fuel tank is full. WARNING! • Never have any smoking materials lit in or near the vehicle when the gas cap is removed or the tank filled. • Never add fuel when the engine is running. This is in violation of most state and federal fire regulations and will cause the malfunction indicator light to turn on. CAUTION! A poorly fitting gas cap may cause the Malfunction Indicator Light to turn on.