[steve_2883]

So, I get in my HEV today and it says the key fob cannot be detected. I get the second key fob and it gives the same error. I read the owner's manual and placed the key in the 'key pocket' as instructed, which I deduce is the 2nd cup holder. Same problem. Batteries in the FOB's are good and they both work fine otherwise, they lock/unlock, lower the tailgate, and even remote start. At this point, I'm at a loss. The drive battery is 100% charged and the 12V battery is operating accessories fine.

Any suggestions would be super helpful; my house is on the side of a mountain here in AZ with a narrow, steep uphill driveway, towing will be difficult.

 

[Dark-Fx]

Disconnect the 12V battery, wait 10 seconds, reconnect it.

 

[steve_2883]

Disconnect the 12V battery, wait 10 seconds, reconnect it.

Disconnected the negative cable, waited 10+ seconds reconnected. No luck still :-(

 

[Shaved Ice]

I would try disconnecting the 12V longer. Others here no how long as you have to reset the windows before shifting into gear. The TFL Hummer “break down” video features it as well. I would try starting it via the app then seeing if the fob is detected.

I would also try taking out the fob battery and putting it back inside the truck. Heck, I would try a new fob battery before I had it towed. Good luck and let us know what works.

 

[INgolfer]

hmmm, haven’t heard of anyone bringing this problem up before. Interested to find out what the issue is

 

[azbill]

hmmm, haven’t heard of anyone bringing this problem up before. Interested to find out what the issue is

I have had this happen on my Bolt at least twice. Both times I swapped the batteries in the fob and it worked again. It would also lock and unlock the car. Putting the fob in the console slot did allow me to start the car, I think that puts it close to the receiver antenna and picks up the weak signal.

 

[Dark-Fx]

I have had this happen on my Bolt at least twice. Both times I swapped the batteries in the fob and it worked again. It would also lock and unlock the car. Putting the fob in the console slot did allow me to start the car, I think that puts it close to the receiver antenna and picks up the weak signal.

I'm 99% sure that a dead fob (battery) works in that spot because the transceiver is actually powering the fob as though it were entirely passive.

 

[steve_2883]

I would try disconnecting the 12V longer. Others here no how long as you have to reset the windows before shifting into gear. The TFL Hummer “break down” video features it as well. I would try starting it via the app then seeing if the fob is detected.

I would also try taking out the fob battery and putting it back inside the truck. Heck, I would try a new fob battery before I had it towed. Good luck and let us know what works.

Disconnected for over an hour, and still no luck.

 

[steve_2883]

I have had this happen on my Bolt at least twice. Both times I swapped the batteries in the fob and it worked again. It would also lock and unlock the car. Putting the fob in the console slot did allow me to start the car, I think that puts it close to the receiver antenna and picks up the weak signal.

I placed both fobs in the 2nd cupholder and it still didn't work.

 

[Dark-Fx]

Any history of rodent damage in any of your vehicles?

 

[steve_2883]

No, they are garage kept and I don't have a rodent issue

 

[Nebula1701]

Page 11:

https://www.gmc.com/bypass/pcf/gma-content-api/resources/sites/GMA/content/staging/MANUALS/6000/MA6709/en_US/1.0/23_GMC_Hummer_EV_OM_en_US_U_84867426A_2022AUG01.pdf

 

[Dark-Fx]

I placed both fobs in the 2nd cupholder and it still didn't work.

2nd cupholder being the closer of the two?

I'm out of ideas without having the ability to plug my tools into the vehicle. Could be just something needs a reset but it's not something the average person can do.

 

[steve_2883]

Thanks for the input guys...dealership sent a flatbed to tow it away. Towing company was not pleased having to put a 9000lb truck on skates on a sloped driveway on the side of a mountain

 

[Shaved Ice]

I bet the towing company was thrilled. Anyway, please let us know what you find out.

 

[PFRobinson]

I bet the towing company was thrilled. Anyway, please let us know what you find out.

I don’t know. These Hummer’s are becoming a recall nightmare. Dare I say lemon.

 

[Shaved Ice]

Mine is running strong with over 12K on the odometer.

 

[PFRobinson]

Mine is running strong with over 12K on the odometer.

Sounds like a lucky guy

 

[steve_2883]

I expected there to be quirks, but not issues that completely brick the vehicle.

 

[PFRobinson]

I expected there to be quirks, but not issues that completely brick the vehicle.

Especially at that price. Expensive 🧱 brick.