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

[gooffeyguy]

If you have the factory tilt sensor, and it's still mounted on the lower airduct, there is a TSB about relocating it..

View attachment 435006

Mine used to go off all the time, I just removed it instead.
Opening it, there is a metal dome on a circuit board about the size of a half dollar with liquid inside.

View attachment 435007

How was it mounted, sticky tape?

 

[mikez71]

Update...

Went out and started yukon and the "Rear door unsecured" or whatever message was on the DIC. I opened the liftgate with the button on the overhead and went back to make sure the Husky mat wasn't blocking anything then closed it with the button on the liftgate. Message went away. I then went back and opened the glass and the same message displayed on the DIC. Closed glass and message went away.

So, is the sensor built into the latch? If so, how do I tell which latch, the liftgate or glass, may be going bad? Would the Tech2 help with this in any way?

They have seperate sensors. Liftgate Open/Ajar or Liftglass Ajar. I would have assumed the Tech2 would show it, but can't find it in the Tech 2 Paths..

 

[mikez71]

How was it mounted, sticky tape?

Yep, and it was about 3/16" thick with a cutout for some bumps on the bottom side that would have allowed it to mount on a tab.

 

[mikez71]

Found it. liftglass under liftgate module, liftgate under bcm rear body.

 

[CMoore711]

Been hearing an inconsistent klank up front for a few days and the front end just feeling a little “loose”.

Found out my front passenger side sway bar end link decided to end our relationship without telling me…

 

[gooffeyguy]

If you have the factory tilt sensor, and it's still mounted on the lower airduct, there is a TSB about relocating it..

View attachment 435006

Mine used to go off all the time, I just removed it instead.
Opening it, there is a metal dome on a circuit board about the size of a half dollar with liquid inside.

View attachment 435007

I broke out the Tech2 and figured I'd look at the Theft Data info to see what triggered it. There was no trigger history, lol

 

[gooffeyguy]

View attachment 434938

Had the tech2 hooked up a bit ago. Here's my fuel pump modual data screen



Also while in there looking around I noticed a screen where you can get a whole lot of misfire data.

Under ECM, Data Display, Misfire Data

 

[Doubeleive]

I broke out the Tech2 and figured I'd look at the Theft Data info to see what triggered it. There was no trigger history, lol

View attachment 435030

the only thing that really set's off a factory alarm on the gmt800/900 is if a door is opened while it is armed, so it could very well be the rear hatch sensor. not sure how the rear actuator is configured as far that goes.
@mikez71 that's a mercury switch, it was probably added on at some point i don't think my Denali even has one factory

 

[Doubeleive]

Had the tech2 hooked up a bit ago. Here's my fuel pump modual data screen

View attachment 435031

Also while in there looking around I noticed a screen where you can get a whole lot of misfire data.

Under ECM, Data Display, Misfire Data

ya that's where you get the misfire graphic, that's seperate from just regular misfire monitoring

 

[gooffeyguy]

the only thing that really set's off a factory alarm on the gmt800/900 is if a door is opened while it is armed, so it could very well be the rear hatch sensor. not sure how the rear actuator is configured as far that goes.
@mikez71 that's a mercury switch, it was probably added on at some point i don't think my Denali even has one factory

I was hoping that theft data would tell me which sensor set the alarm off, but it shows like it never went off.