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

[Just Fishing]

Looking for a favor from anyone who lives life on the edge with no TPMS.

I’m trying to figure out if your truck will go into learn mode even if you have no sensors in your wheels.




I always bring my express van drama here. I’m fairly certain it falls in the NNBS category (2008 express NNBS style steering wheel and cluster).

I bought the van in 2019, the tpms system was working. I replaced the battery with an optima battery shortly after and the systems all reset. No readings from the TPMS system. Tried to relearn them and my van just would not go into learn mode. Searched the web with no luck. I let it go for months. In like 2020 I bought 4 new tires and I asked them if they could figure out why my sensors wouldn’t work. They called me and told me it would be like $500+ to even diagnose so I told them to just rip all the sensors out and install regular valve stems because 1 of the sensors was leaking anyway. I’ve chalked it up since then.

Fast foward to now. I’m exploring what I can do to try fix the issues. The information I’m receiving from other sites is that possibly the vehicle won’t even enter learn mode if no sensors are nearby/active. But no solid answers just speculation. I have my doubts because I have a hard time believing all 4 sensors went bad at the same time when I changed my battery in 2019.

If anyone who doesn’t have sensors installed could do me a solid and let me know if your truck will enter learn mode or just doesn’t respond when you try it. I’d greatly appreciate it.

When i did mine, i activated the tpms learn via a tech2, then i used a cheap little yellow activator wand thing on the sensors following the instructions i found talking about what wheel to start with.

The wand thingy i guess wakes the sensor up to check condititon of some basic shit, then the tahoe can read.

I get a honk, then move to the next sensor following the manual.

This is what i have for my 09.
It also worked for my wifes 2011

https://a.co/d/j0hwmUc

Edit: no judge here, hell i talk about my pos jeep project here (aka STD jeep).

And i might have mis read, going w/o tpms, or your trying to learn a new set?

 

[Onlyone]

Installed a dash skin yesterday. Turned out very good. Much Better than the huge cracks.

 

[Tonyv__]

When i did mine, i activated the tpms learn via a tech2, then i used a cheap little yellow activator wand thing on the sensors following the instructions i found talking about what wheel to start with.

The wand thingy i guess wakes the sensor up to check condititon of some basic shit, then the tahoe can read.

I get a honk, then move to the next sensor following the manual.

This is what i have for my 09.
It also worked for my wifes 2011

https://a.co/d/j0hwmUc

Edit: no judge here, hell i talk about my pos jeep project here (aka STD jeep).

And i might have mis read, going w/o tpms, or your trying to learn a new set?

My tech 2 came in last night. I’m gonna try to program them with that or find out if my receiver is bad. If I need to replace the receiver, I need the tech 2 anyway to program it to my van.

Right now I have no sensors installed in the wheels. I’ve been going on like 3 years with this issue and last time I bought tires, a valve stem was leaking so I had them put 4 regular valve stems in. I did however just order 4 sensors from rock auto because I want to get the situation taken care of.

I’m just hella confused because the sensors 100% worked when I bought the van. But I can’t get the van to go into learn mode. So I’m not sure when this issue started

I also have that cheap wand thing you’re talking about. I use it on my Yukon. It just activates the sensor so you don’t have to sit there and air the sensor down then back up.

 

[Fubar0715]

Here is the link to the "wand thingy" mention for the relearn. I own this one myself and use it twice a year when swapping out wifey's snow tires.

https://www.amazon.com/gp/product/B072BK693N/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

 

[89Suburban]

Here is the link to the "wand thingy" mention for the relearn. I own this one myself and use it twice a year when swapping out wifey's snow tires.

https://www.amazon.com/gp/product/B072BK693N/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I tried one of those and it wouldn't trip the sensors on mine.

 

[Just Fishing]

I tried one of those and it wouldn't trip the sensors on mine.

Mine worked great, but it was sensitive to where i put the wand.
I think i used the tire side to get a "Trip" to happen.

and I got my tpms sensors off of amazon cheap, if you need the link I can pull it.

 

[Just Fishing]

Here is the link to the "wand thingy" mention for the relearn. I own this one myself and use it twice a year when swapping out wifey's snow tires.

https://www.amazon.com/gp/product/B072BK693N/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

same one as the one i used, I can vouch for it.

 

[Tonyv__]

Played with my tech2 for about an hour. I guess I have to assume the remote receiver module went bad.

When I go into the module and read the DTC codes I get a U3FFF with no explanation. Google doesn’t show much on U3FFF. If I try to clear it , it comes back unsuccessful. If I try to program the sensors it tells me to set the tire settings first. So I go into tire settings. Set the load range and desired PSI settings then it loses connection with vehicle every time I try to set it. I can however read the sensors that are currently programmed into the module. Can’t really do much else with it.

I can confirm the tech 2 will communicate with the rest of the vehicle though. I was able to do a few other things but once I mess with the remote receiver it starts acting up.

 

[George B]

Played with my tech2 for about an hour. I guess I have to assume the remote receiver module went bad.

When I go into the module and read the DTC codes I get a U3FFF with no explanation. Google doesn’t show much on U3FFF. If I try to clear it , it comes back unsuccessful. If I try to program the sensors it tells me to set the tire settings first. So I go into tire settings. Set the load range and desired PSI settings then it loses connection with vehicle every time I try to set it. I can however read the sensors that are currently programmed into the module. Can’t really do much else with it.

I can confirm the tech 2 will communicate with the rest of the vehicle though. I was able to do a few other things but once I mess with the remote receiver it starts acting up.

More here.

TPMS and Remote Won't Work??

I have a 2007 Tahoe, just did a complete makeover in and out but now after finally getting it back on the road have noticed that the remote and tpms sensors are not working. I have scanned the computer and am coming up with network code U3FFF, anyone have any insight on this?

www.tahoeyukonforum.com

 

[Tonyv__]

More here.

TPMS and Remote Won't Work??

I have a 2007 Tahoe, just did a complete makeover in and out but now after finally getting it back on the road have noticed that the remote and tpms sensors are not working. I have scanned the computer and am coming up with network code U3FFF, anyone have any insight on this?

www.tahoeyukonforum.com

Thanks. I’m about to just order one. I’m already this invested, No giving up now. They’re a little under $100.

 

[89Suburban]

Mine worked great, but it was sensitive to where i put the wand.
I think i used the tire side to get a "Trip" to happen.

and I got my tpms sensors off of amazon cheap, if you need the link I can pull it.

I tried everything. This is the one I tried and returned for credit:

https://www.amazon.com/gp/product/B0915P2XHN/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Did you have a different one?

 

[avalonandl]

Installed a dash skin yesterday. Turned out very good. Much Better than the huge cracks.View attachment 390505View attachment 390506View attachment 390507View attachment 390508View attachment 390509

I installed one on my Denali XL and it keeps the dash from flapping in the broken part.

 

[Sparksalot]

I tried everything. This is the one I tried and returned for credit:

https://www.amazon.com/gp/product/B0915P2XHN/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Did you have a different one?

This is the one I’ve had a few years. Supposedly works for GM or Fjord. It’s kinda picky. I’ve found the best way to get it to trip a sensor is to hold it vertically oriented with the back side flat against the tire.

 

[Just Fishing]

I tried everything. This is the one I tried and returned for credit:

https://www.amazon.com/gp/product/B0915P2XHN/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Did you have a different one?

Yup,

https://www.amazon.com/gp/product/B072BK693N/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

IIRC i found I needed to hold the little tip next to the tpms sensor through the tire, or close to the rim in order to get it to do it's thing.

 

[89Suburban]

This is the one I’ve had a few years. Supposedly works for GM or Fjord. It’s kinda picky. I’ve found the best way to get it to trip a sensor is to hold it vertically oriented with the back side flat against the tire.

View attachment 390565

Can you take a picture of how you orient it on the tire for me? I didn't lay it flat, I pointed it like a gun. I tried through the rim, at the stem tip, and through the tire above the rim.

 

[89Suburban]

Yup,

https://www.amazon.com/gp/product/B072BK693N/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

IIRC i found I needed to hold the little tip next to the tpms sensor through the tire, or close to the rim in order to get it to do it's thing.

Damn! Only 9 bucks!

 

[swathdiver]

Can you take a picture of how you orient it on the tire for me? I didn't lay it flat, I pointed it like a gun. I tried through the rim, at the stem tip, and through the tire above the rim.

I do mine with that black tip pointed against the tire right below the valve stem. Make sure the battery is good!

 

[Fubar0715]

I do mine with that black tip pointed against the tire right below the valve stem. Make sure the battery is good!

I put mine near the valve stem pointing up - flush against the tire or rim. Took a little trial and error (ie...patting my head and rubbing my belly) to get the right combo to work.

 

[gooffeyguy]

Low fuel light came on a couple days ago. Finally put gas in it this afternoon. 27.5 gallons, $105 total

 

[Just Fishing]

I do one of these with the TPMS tool, feel it out with the force until it works.