If there is a problem with the EVAP system, it could cause the gas cap light to come on. On inspection, the Jeep Grand Cherokee Check Fuel Cap light is $95, which includes $9 for parts, $9 for labor, and $95 for each part. Depending on where you are, prices may vary. The gas cap protects the gas tank from spills, evaporation, and contamination The Jeep Grand Cherokee has a Selec-Trac system that allows the driver to choose between two or four-wheel drive. This system is designed to give the driver more control over the vehicle, and it can be useful in different types of terrain. Jeep Grand Cherokee Capless Gas Tank Problems; Jeep 4.0 Oil Pressure Problems [Reasons & Solutions Method 6: Drill a hole in gas tank. As a last resort, you can get gas from a car by drilling a hole into the tank. Put a canister underneath the hole, and gas will flow into it. Aside from the fact that this will destroy the fuel tank, there is a considerable fire risk when drilling into metal fuel tanks. The metal-on-metal will create sparks There is a tiny hole near the bottom of the gas pump nozzle connected to a small tube. Normally air flows through the tube while you're filling the tank. The clicking noise you are hearing is the fuel backing up in the fill tube. Basically, the gas is coming out of the gas pump at a pressure that is too fast for the car to take in. 2014 Grand Cherokee Overland EcoDiesel - Lemon Bought Back; 2016 Grand Cherokee Overland EcoDiesel - Billet/Black, ORA II, Adv. Tech (Also bought back by FCA) Back to old faithful: 2008 Grand Cherokee Limited 3.0L CRD with Stage 1.5 Tune, 44K miles, Resonator Delete, EGR Delete, DPF Delete (Dyno 217 RWHP/351RWTQ) 2015 Jeep Renegade fuel system problems with 44 complaints from Renegade owners. The worst complaints are failed fuel pump, capless gas tank housing came off, and gas milage not as advertised. Capless Gas System - Pros and Cons.As you open the gas tank flap all set to unscrew the gas cap, you quickly realize that there isn't one. There is just a s Open the gas tank on a 2020 Jeep Grand Cherokee. Turn the ignition off. Push and release the rear edge of the fuel filter door. The door will pop open. In snowy conditions, ice could prevent the door from opening. In this condition lightly push the outer edge of the door to break and clear away any icy build up. DanBuchanan Discussion starter · Sep 11, 2019. My new Jeep 2019 Grand Cherokee Limited has a capless gas tank filler. I would think dirt and water could get into my gas tank. I seen that Advance Auto sells a locking plug cap for about 20 dollars. If i put this on my vehicle will it affect the sensors and check engine light? Hold the pump nozzle up a bit instead of resting it completely in the filler tube and fill slower as you near a full tank. Also you don't want to keep clicking the nozzle in an attempt to fill completely to the top of the filler neck. I'm told overfilling can cause problems with the vapor recovery system in the vehicle. WkGxE41.