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

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Sam Harris

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I have CM paint left over and plan on it too. Just not sure if I chance it fitting and paint it first or try the fit, then paint afterwards. I only want to pull the headliner down once, I have my boost/afr gauge in the a-pillar and it’s not easy to mess with it. I’m about 95% sure it will fit so I’m thinking I’ll paint it first. There’s no going back at that point, right?
Damn right..! It’ll fit..!
 

diLucca

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What's wrong with it? What's it doing?

Intermittent ABS and Brake light on dash, especially in warmer weather.
C0265 code, sometimes with others abs related codes.

And activation in low speeds, but thats my fault, when I renewing front end, I forgot to clean sensors(before overhaul of front, no low speed activation).

I can live without ABS, but in my Yukon is no valve to regulate power to rear brakes, it is done by ABS, and braking with sliding rear is sometime fun, but mostly not :)
 

NoReverseYukon

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Began shopping for a lift kit. How in the Hell can such a large vehicle be so frickin' low to the ground. I'm too old to be doing yoga poses under it just to try to get a wrench where it needs to go without getting stuck.
I was trying to get at B2S1 O2 sensor. It won this round. Just hope I don't have the trouble that @Tonyrodz did.

Also had that damned P1870 code pop up along with the harsh 1 to 2 shift. And here I thought I was successful in rebuilding the tranny.

I will take any suggestions as to "easy" and most obvious fixes. I think I might pull a valve body from the salvage yard to practice on.
 

Rocket Man

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Began shopping for a lift kit. How in the Hell can such a large vehicle be so frickin' low to the ground. I'm too old to be doing yoga poses under it just to try to get a wrench where it needs to go without getting stuck.
I was trying to get at B2S1 O2 sensor. It won this round. Just hope I don't have the trouble that @Tonyrodz did.

Also had that damned P1870 code pop up along with the harsh 1 to 2 shift. And here I thought I was successful in rebuilding the tranny.

I will take any suggestions as to "easy" and most obvious fixes. I think I might pull a valve body from the salvage yard to practice on.
Don’t you have ramps or jack stands? So that sensor is stuck? Dammit.
 

Tonyrodz

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Began shopping for a lift kit. How in the Hell can such a large vehicle be so frickin' low to the ground. I'm too old to be doing yoga poses under it just to try to get a wrench where it needs to go without getting stuck.
I was trying to get at B2S1 O2 sensor. It won this round. Just hope I don't have the trouble that @Tonyrodz did.

Also had that damned P1870 code pop up along with the harsh 1 to 2 shift. And here I thought I was successful in rebuilding the tranny.

I will take any suggestions as to "easy" and most obvious fixes. I think I might pull a valve body from the salvage yard to practice on.
20210225_143309.jpg
Goes from changing fluid to getting a new trans.
I also found this--https://www.gmtruckclub.com/threads/look-here-trouble-code-p1870-for-harsh-1-2-shifts.54475/
It may or may not apply, but it's interesting nonetheless. Trans problems suk more then engine problems! What issue are you having with the O2? Seized, not wanting to come out?
 

Dantheman1540

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I just had two O2s seized on a 2013 Hyundai I did a downpipe on, for a Florida car with low miles I never expected them to be so stuck. I soaked multiple times with penetrating oil, hit with an air hammer to try to free up rust, torched until hot, and finally pulled the pipe put it in a vice and let big daddy M18 impact have a go until it rounded the threads smooth. The lesson is sometimes you just can't win, luckily all I had to do was get new sensors as I already had the new down pipe.
 

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