What did you do to your NBS GMT800 Tahoe/Yukon Today?

[S33k3r]

Buick Reatta.
2 seat businessman’s coupe.

My bad. One of the members of our friend group had one before marrying another member of the group. They got rid of theirs shortly after their first kid.

 

[S33k3r]

When I was trying to upload a blackbear tune I was getting those errors and I ended up pulling the fuse called CHMS (I think is mean chimes but could be wrong) and the radio fuse. Anyways it was causing communication interference.

I pulled the radio and the AMP fuse. So far, no "reduced engine power". But it is intermittent, so I am testing the crap out of it before saying that's it.

THANK you so much for the suggestion! I don't know if that's the fix, but it sure was an unconsidered path before you suggested it.

 

[latvius]

I pulled the radio and the AMP fuse. So far, no "reduced engine power". But it is intermittent, so I am testing the crap out of it before saying that's it.

THANK you so much for the suggestion! I don't know if that's the fix, but it sure was an unconsidered path before you suggested it.

Hope it works don't forget about that CHSM (google says CHMSL) which it says has something to do with trailer lights?
I dunno, but it was really the one that did it for me if I remember right.
BlackBear was the real hero, I guess I wasn't the only one getting that error when trying to communicate with the port and upload a tune.

 

[Fless]

Anytime you're programming it's recommended to remove power from any aftermarket devices.

 

[latvius]

Anytime you're programming it's recommended to remove power from any aftermarket devices.

News to me

 

[Fless]

News to me

A few of us have experienced that solution, including myself and @Rocket Man. There are a few statements in various posts about it.

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

Does the temp still show on the DIC? I've seen that option in the tech2, but I think @Doubeleive might be able to fill you in more on the problem he had and what the symptoms were. Basically I think when its programmed to show the outdoor temp its actually wrong for our model and it will act...

www.tahoeyukonforum.com

 

[latvius]

That would be a good thing in some kind of lessons learned sticky I would think.

 

[JCODOHERTY]

Blue LEDs for the Speedo. https://www.tahoeyukonforum.com/threads/04-gmc-yxl-speedo-cluster-repaired-and-leds-added.150123/

 

[S33k3r]

Hope it works don't forget about that CHSM (google says CHMSL) which it says has something to do with trailer lights?
I dunno, but it was really the one that did it for me if I remember right.
BlackBear was the real hero, I guess I wasn't the only one getting that error when trying to communicate with the port and upload a tune.

I didn't see a fuse labelled that. So it's just the Amp fuse and the radio fuse. We're driving it around the house/city streets where limp mode isn't as much of a problem and it's driving fine. My wife has built up confidence to try driving it to work again!

I let her know the risks and greenlit her going if she accepted them.

 

[latvius]

I didn't see a fuse labelled that. So it's just the Amp fuse and the radio fuse. We're driving it around the house/city streets where limp mode isn't as much of a problem and it's driving fine. My wife has built up confidence to try driving it to work again!

I let her know the risks and greenlit her going if she accepted them.

Glad it's going good so far hope that is a real step in narrowing the problem, just for my own sanity I found the fuse I was talking about it is in the alternate fuse box location (drivers side dash)