Filling Gas Tank

Hey guys. 1100 miles into my new 2017 Tahoe 4 x4 LT and love it. Just one issue I can't quite get a handle on. I am new to this whole capless gas tank deal. Frankly when I filled the tank for the first time, I grabbed the top of the neck and tried to unscrew it. I quickly figured out there was something else going on and figured out the capless tank deal.

With that said, after inserting the gas nozzle all the way into the tank, when I went to remove the gas nozzle from the tank, the little wires that are wrapped around the nozzle at the top caused me to have to wiggle the nozzle back and forth to remove the nozzle from the tank. It almost felt like in the wrong situation the gas nozzle could get stuck in the tank. As such, I reverted to inserting the nozzle into the tank probably half way and before the the little wires started. When I topped off the tank just a tad after the pump cut off automatically (probably a bad habit I need to get out of), a bit of the gas came out of the tank and ran down the side of the truck.

Obviously I am doing something wrong. Should I just insert the nozzle all the way and accept that I am going to have to wiggle it back and forth, and have faith that it won't get stuck, or should I insert the nozzle half way and quit trying to top the tank off? I know it seems like an elementary question, but just wanted to see what others were doing/experiencing. My brother has a Cadillac with a capless gas tank. I asked him what he was doing and he said just putting the damn nozzle in the tank and filling it. Not exactly what I was looking for, so if anyone can add any additional information it is much appreciated.

My work truck has that. I just insert it until the coil on the pump handle hits. Then fill

When i gas anything up i dont use that much force i just put the pump in till it stops... its when i push harder to jab my gas cap or something (because no automatic fill in most NY stations and you have to stand there like a fool) it gets stuck.... some places have a rubber sleeve with spring, some have just a rubber gauntlet some have nothing.... depends where i am... and if you up lift the pump up, sort of push up towards roof while pulling itll slide right out.

The capless tanks cannot be topped off, which you've obviously figured out. They will overflow. I have a 2017 too, some gas station pumps have weird angles to their nozzles and take some finagling to get into the tank.


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I've been using cap less fills for several years now on my Ford Fusion Hybrids. You need to inser the nozzle all the way in for the vapor emissions guard on the nozzle. When it clicks off, the tank should be full. Wait 5 seconds and remove. It does not always come out smoothly, and that is normal.

Also, your sales person should have explained this.

Enjoy your truck.

Crabdog said:

As such, I reverted to inserting the nozzle into the tank probably half way and before the the little wires started. When I topped off the tank just a tad after the pump cut off automatically (probably a bad habit I need to get out of), a bit of the gas came out of the tank and ran down the side of the truck.

Obviously I am doing something wrong. Should I just insert the nozzle all the way and accept that I am going to have to wiggle it back and forth, and have faith that it won't get stuck, or should I insert the nozzle half way and quit trying to top the tank off? I know it seems like an elementary question, but just wanted to see what others were doing/experiencing. My brother has a Cadillac with a capless gas tank. I asked him what he was doing and he said just putting the damn nozzle in the tank and filling it. Not exactly what I was looking for, so if anyone can add any additional information it is much appreciated.

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If you are holding the nozzle half way out of the tank then that means you are going to fill your tank up even more by the time the pump auto-stops. Therefore, "topping it off" is more likely to result in overfill.

Thanks everybody for the feedback. Will just insert the nozzle fully and "wiggle" out.

When I bought my new 2015 Silverado, they told me not to fill it farther after it clicked off. So I haven't and I have never had an issue filling the tank. Of course, it is not one of those non-removable caps I have to deal with. The reason the salesman said not keep filling it was because the computer would be messed us and not compute mileage properly. And it would not record the "miles to empty" properly. On our 2008 Tahoe Hybrid, I always top it off, but I drive a couple of miles on the highway to use a little of the fuel so it will not "the vapors" and leak fumes as it sits in the garage while full.

Nashoba said:

When I bought my new 2015 Silverado, they told me not to fill it farther after it clicked off. So I haven't and I have never had an issue filling the tank. Of course, it is not one of those non-removable caps I have to deal with. The reason the salesman said not keep filling it was because the computer would be messed us and not compute mileage properly. And it would not record the "miles to empty" properly. On our 2008 Tahoe Hybrid, I always top it off, but I drive a couple of miles on the highway to use a little of the fuel so it will not "the vapors" and leak fumes as it sits in the garage while full.

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The reason not to overfill your fuel tank is that it can send raw fuel into the charcoal canister and ruin it or shorten its life expectancy.