GMC Yukon XL Denali: Locking Fuel Cap Removed - 13600km

I decided to remove the locking fuel cap that I installed on my 2006 GMC Yukon XL Denali a while back. There were rumors that the Yukon had an anti-siphoning device but I could not find confirmation myself until today.

I bought a Flo 'N Go gas pump to use in the garage so that I could fill up the Burgman without having to make a special trip down the mountain. After I put it together I tested it to see if I could siphon some gas out of the Denali....

I couldn't. There was no way to get the tube far enough down the fuel neck to reach the gas because of obstructions. I shoved and shoved the tube and then it got stuck between 12-18 inches down. So I feel confident enough that siphoning gas out of that 119L tank would not be an easy task. (Of course, drilling holes is a completely different issue!)

The locking cap was not all that convenient. With it, I would always forget to take the keys with me and would have to run back to get them out of the ignition. That of course turned off the stereo so that my wife and kids would have to sit in silence while I filled the tank. And then, unlocking and removing the cap without applying pressure to the key (as directed by the instructions) was nearly impossible. Plus, once it was off, there was no tether to keep it close-by. Putting the OEM fuel cap back on will make filling the tank much more convenient.


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