Gas fume smell near filler , no apparent leaks or wetness underneath. 2005 chevy tahoe 2 wheel drive

Do not top off your gas tank. The gas is going into carbon canister which is only for fuel vapors to go into (carbon canister opening near the top of fuel neck near the gas cap). Your flooding the fuel vapor canister with liquid fuel; of course you are going to get a sensor message... 'Evap emmission,control sys leak

P0443 The fuel vapor canister reduces that gas smell on hot days outside/inside of car. The fuel vapor canister fillers bad smells from gas tank on hot days when the gas expands and burps fumes through carbon canister filter. From the canister (gas vapor fumes) goes back into the engine to be burned again...it's a closed loop for vapors to be recycled though engine. Don't worry, once the carbon canister dries out and no longer flooded with raw fuel the code should go away...just don't let the top off fuel tank back flow into the 'Evap emission control' carbon filter near the top and close to the gas cap...:)

Have a Dealer take a look at it. Gasoline fumes leaking is flammable as
liquid

is your purge canister working correctly or does it cause the fumes to stay in fuel tank and smell from the tank cap. Check when the car is off by removing the filler cap whether you have a pressure in tank. this might cause the smell,unless there is a small leak not noticeable somewhere.

I had a 2000 with leaking fuel lines. There are a few molded rubber lines. Check the condition of the rubber and the hose clamps. If they are wet, you have a leak. When replacing use the good clamps that you can tighten with a nut driver

I would check the gas cap to make sure the gasket is seating correctly on the filler neck. Also check, if you can, the filler neck from the gas cap down to the tank. If it is damaged, it could seep gas fumes. If you see no other signs of an obvious leak on the garage floor, it's likely a gasket issue in the fuel fill side of the system. It does not take much fumes to smell it strongly.

Is your check engine light on? Fumes rise, so if the leak is in the top of the tank or the filler neck, this would allow the fumes to escape, smelling of gas, and tripping your check engine light.

normally fumes come in to vehicle when stopped because of oil leak from rocker cover but check your fuel filler cap seal etc and also incase the tank is leaking just have a sniff at the rear of the car if its the filler cap or tank filler you normally get smell when tank is nearly full and been around a few corners the fuell filler nect becomes pourous and just spills out a bit if so will need replacing .but most time its an oil leak from rocker box or engine

Hows your gas milage or do you have any check engine lights come on?Usually if theres no leakage signs its an indication of the evap system leaking.That is recycling of the gas fumes.Its a vacuum system that is now manditory on cars.Thats usually rhe answer when theres no leaking happening.After driving awile open your gas cap,see if you get a vacuum sound when you open it.

this sounds like a gas pressure regulatur. a few minutes after starting,you start smelling fumes,and are getting bad gas mileage right?

I also have a 2004 XC90 and a couple of months ago I had the exact same probelm... after multiple visits to my dealer's auto shop they figured out that it was the fuel pump. They replaced the fule pump and the smell disappeared. Good luck!