What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[Tonyv__]

it should go into learn mode and then eventually time out if nothing is synced, I think times out in like 2 minutes if no activity. same nbs, nnbs, k2

That’s exactly what I’m thinking. I’m being treated like a moron elsewhere saying “you can’t complete the learn cycle without sensors” and obviously I know that but what I’m trying to figure out is why the truck won’t even go into learn to begin with. Then other commenters are saying “ you already got your answer” lol.

Im thinking ok. Maybe they’re on to something because they’re right I don’t have any sensors. But they’re still not answering my question about why it will or won’t go into learn mode. Idk. I’m annoyed. I don’t feel like dumping a ton of money to diagnose though either.

 

[gooffeyguy]

Wes is right.....



Are you sure you're entering the learn mode proceedure correctly?

 

[Tonyv__]

it should go into learn mode and then eventually time out if nothing is synced, I think times out in like 2 minutes if no activity. same nbs, nnbs, k2

Part of me wonders if it’s worth it to get a clone tech 2 simply to manually install the sensors. I can 100% say they were linked before the battery change so I’m stumped as to why it’s not working. Wondering if the van was dealer serviced and they did it with their tech 2 or maybe it’s been programmed from new.

 

[Tonyv__]

Wes is right.....

View attachment 390064

Are you sure you're entering the learn mode proceedure correctly?

That’s also my understanding. I guess now im just trying to figure out what the next steps are. It seems not many people have any input on the TPMS system diagnostics

 

[gooffeyguy]

My manual says to enter learn mode to press the lock & unlock buttons on remote at the same time, but mine won't and I have to hit the lock button first and hold it in then I press and hold the unlock button.

Doing this locks the doors before entering learn mode, and I usually roll down the driver's window and reach in through the window when doing it

 

[swathdiver]

Part of me wonders if it’s worth it to get a clone tech 2 simply to manually install the sensors. I can 100% say they were linked before the battery change so I’m stumped as to why it’s not working. Wondering if the van was dealer serviced and they did it with their tech 2 or maybe it’s been programmed from new

Tech-2 doesn't work on your 2015 Tony. Gotta use the MDI and GDS on a laptop.

 

[Tonyv__]

Tech-2 doesn't work on your 2015 Tony. Gotta use the MDI and GDS on a laptop.

This is in reference to my 2008 express van. Which isn’t in my signature, but might as well be since I spend more time working on that than my Denali

 

[Tonyv__]

My manual says to enter learn mode to press the lock & unlock buttons on remote at the same time, but mine won't and I have to hit the lock button first and hold it in then I press and hold the unlock button.

Doing this locks the doors before entering learn mode, and I usually roll down the driver's window and reach in through the window when doing it

No factory fob because my van is all manual. I can access the menu from the buttons on the dash though

 

[swathdiver]

This is in reference to my 2008 express van. Which isn’t in my signature, but might as well be since I spend more time working on that than my Denali

Just went back and saw that. Yes, you should be able to enter learn mode whether the sensors are there or not as it is initiated from the RCDLR. Your Remote Control Door Lock Reciever may be bad and that's why nothing is working. Ought to be codes in the BCM for this.

 

[Tonyv__]

Just went back and saw that. Yes, you should be able to enter learn mode whether the sensors are there or not as it is initiated from the RCDLR. Your Remote Control Door Lock Reciever may be bad and that's why nothing is working. Ought to be codes in the BCM for this.

Hmm can I see them codes with anything other than a tech 2?