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I have a 2016 GM Yukon SLT that I purchased new about a year and a half ago (love it)! There is one feature or quirk that it has concerning locking the key fob in the car that needs to be addressed and so I will.
My Yukon has the new keyless push button start feature and all you need on your person is the key fob and the car will start. There is also a safety feature built in so that if the key fob is left in the FRONT of the vehicle, a sensor will acknowledge its presence and the doors will not lock automatically. I DO have the settings on my menu set so that the car self locks after 15 seconds of you exiting assuming you also take the key fob with you and if you accidentally leave it in the cup holder or something it will not lock because it detects the fob. All good right?

WELL....... I found out a few weeks ago (on a long distance trip into PA) that there ARE exceptions!! I was wearing a Suit and had the key fob in the pocket of the Jacket. To avoid wrinkling the Jacket I took it off while driving and placed it in the rear of the SUV. When we stopped for Gas my Wife went to the Ladies room and I was pumping Gas when I heard the car automatically self lock. Chills ran down my spine and I was really surprised and upset! THEN I realized my Wife had the spare key fob in her pocketbook (which thankfully she had with her) and so as soon as she walked over to the vehicle it opened up with a push of the button on the door handle. Whew - I lucked out BUT I ALWAYS take BOTH key fobs for any vehicle including my Harley when away from home. I keep them in two different locations or give the spare to someone else so if something happens both are not lost. Since I was out of Town, I gave my Wife the spare - fail safe!
So for the next week I was thinking of a solution to this problem without having to turn off the auto lock feature on the SUV (I do like that for the most part) . The key fob does in fact have a key in it that is removable for purposes of opening the door with a dead key fob, however the key is normally inside the fob itself. I could have removed the key from the spare key fob to carry separately in my pocket but that would have been another thing to loose or misplace. They do not make regular non transponder keys for this vehicle so I decided to take matters into my own hands.
I found a piece of chrome plated brass and machined it into the shape and size of the key blank. I then brought it into a Locksmith who cut the special grooves into the metal making the key work. The last step was to put a piece of metal onto it so I could turn it in the lock but yet still keep it minimalistic so I could hide it effectively underneath the car. I will pick up one of those magnetic key cases today and put the new spare key in it under the car. Even if someone found the key, while it would open the door the car wold still not start because the fob would not be there.
So the moral of the story here is I suggest making a spare non transponder door key and hiding it if you own one of these vehicles. You CAN buy a blank online and give them the key code for them to pre cut it, but I do not feel comfortable giving out my key code along with my mailing address so I did it my way. I suppose you could also order it uncut and have your local locksmith do it - I just did it my way. I just want to make owners of vehicles with similar entry and start systems aware that even if the key is in the vehicle it has to be in the front seat area to effectively transmit the signal. Don't get locked out!
BTW I own the SUV for 1 1/2 years and it took me this long to find this out - so when on a long trip I'd suggest ALWAYS carrying the spare fob as well - preferably in another persons pocket! If you can make a spare entrance key and hide it under the car, I'd suggest that too!

BTW the home-made key works GREAT!!!
My Yukon has the new keyless push button start feature and all you need on your person is the key fob and the car will start. There is also a safety feature built in so that if the key fob is left in the FRONT of the vehicle, a sensor will acknowledge its presence and the doors will not lock automatically. I DO have the settings on my menu set so that the car self locks after 15 seconds of you exiting assuming you also take the key fob with you and if you accidentally leave it in the cup holder or something it will not lock because it detects the fob. All good right?


WELL....... I found out a few weeks ago (on a long distance trip into PA) that there ARE exceptions!! I was wearing a Suit and had the key fob in the pocket of the Jacket. To avoid wrinkling the Jacket I took it off while driving and placed it in the rear of the SUV. When we stopped for Gas my Wife went to the Ladies room and I was pumping Gas when I heard the car automatically self lock. Chills ran down my spine and I was really surprised and upset! THEN I realized my Wife had the spare key fob in her pocketbook (which thankfully she had with her) and so as soon as she walked over to the vehicle it opened up with a push of the button on the door handle. Whew - I lucked out BUT I ALWAYS take BOTH key fobs for any vehicle including my Harley when away from home. I keep them in two different locations or give the spare to someone else so if something happens both are not lost. Since I was out of Town, I gave my Wife the spare - fail safe!
So for the next week I was thinking of a solution to this problem without having to turn off the auto lock feature on the SUV (I do like that for the most part) . The key fob does in fact have a key in it that is removable for purposes of opening the door with a dead key fob, however the key is normally inside the fob itself. I could have removed the key from the spare key fob to carry separately in my pocket but that would have been another thing to loose or misplace. They do not make regular non transponder keys for this vehicle so I decided to take matters into my own hands.
I found a piece of chrome plated brass and machined it into the shape and size of the key blank. I then brought it into a Locksmith who cut the special grooves into the metal making the key work. The last step was to put a piece of metal onto it so I could turn it in the lock but yet still keep it minimalistic so I could hide it effectively underneath the car. I will pick up one of those magnetic key cases today and put the new spare key in it under the car. Even if someone found the key, while it would open the door the car wold still not start because the fob would not be there.
So the moral of the story here is I suggest making a spare non transponder door key and hiding it if you own one of these vehicles. You CAN buy a blank online and give them the key code for them to pre cut it, but I do not feel comfortable giving out my key code along with my mailing address so I did it my way. I suppose you could also order it uncut and have your local locksmith do it - I just did it my way. I just want to make owners of vehicles with similar entry and start systems aware that even if the key is in the vehicle it has to be in the front seat area to effectively transmit the signal. Don't get locked out!
BTW I own the SUV for 1 1/2 years and it took me this long to find this out - so when on a long trip I'd suggest ALWAYS carrying the spare fob as well - preferably in another persons pocket! If you can make a spare entrance key and hide it under the car, I'd suggest that too!


BTW the home-made key works GREAT!!!
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