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

[08grey]

Got up bright and early saturday morning (had a busy rest of the day) and replaced the driver side valve cover with the updated PCV design. Had no more smoke at start up issues the rest of the weekend so I think we're fixed back up Cannot tell you how thankful I am that the issue was than and not a valve seal issue which would have been much more labor intensive and $$$.

Is this a tsb also for the 6.2 or just the 5.3?

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[07Burb]

Is this a tsb also for the 6.2 or just the 5.3?

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TBH I’m not sure

 

[iamdub]

Today, I probably won't even touch it.

Last night, I took a bunch of measurements and a few pics. Then I tore the front suspension apart down to the frame.

 

[wjburken]

Taking the family 2-1/2 hrs to my brothers house for thanksgiving

 

[Doubeleive]

about to start this bird, but coffee first

 

[swathdiver]

Parking brake won't hold it?

It holds it but there's no secondary way to stop it still since the TC is in neutral. Not REALLY needed but has been my habit whenever we work on it since the driveway is sloped.

 

[BG1988]

took it out for a spin in the snow had to pick up a few things at the store..

it's probably the first time it's been in the snow only had the TC light come on a few times

 

[osidesurfer365]

Happy Thanksgiving to everyone. Went outside to move her and just saw this leak. This is the first real rain we have had in San Diego in over 6 months. Checked the roof rack and it’s tight. No noticeable rust holes. Any clues?

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[Rocket Man]

Happy Thanksgiving to everyone. Went outside to move her and just saw this leak. This is the first real rain we have had in San Diego in over 6 months. Checked the roof rack and it’s tight. No noticeable rust holes. Any clues?

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Roof racks don’t leak, there’s no holes in the roof where they’re attached. Its usually the shark fin antennas, they do have a hole through the roof where the cable goes through.

 

[osidesurfer365]

Roof racks don’t leak, there’s no holes in the roof where they’re attached. Its usually the shark fin antennas, they do have a hole through the roof where the cable goes through.

Thanks for the info. If the shark antenna is over the drivers side front seat, I can’t imagine water making its way all the way to the passenger side rear pillar like that. Would a faulty door weather strip cause this?


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[Rocket Man]

Thanks for the info. If the shark antenna is over the drivers side front seat, I can’t imagine water making its way all the way to the passenger side rear pillar like that. Would a faulty door weather strip cause this?


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I couldn’t tell that’s what was wet. But yes I guess that could come from a weatherstrip but I would think it would run down from the door. That’s an odd place for a leak.

 

[89Suburban]

Happy Thanksgiving to everyone. Went outside to move her and just saw this leak. This is the first real rain we have had in San Diego in over 6 months. Checked the roof rack and it’s tight. No noticeable rust holes. Any clues?

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VERY strange.

 

[osidesurfer365]

VERY strange.

She sits front end high in driveway so wonder if the leak is somewhere up front? But still doesn’t make sense. So frustrating!!!


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[Tonyrodz]

She sits front end high in driveway so wonder if the leak is somewhere up front? But still doesn’t make sense. So frustrating!!!


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Water travels down hill.

 

[89Suburban]

She sits front end high in driveway so wonder if the leak is somewhere up front? But still doesn’t make sense. So frustrating!!!


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What about the black plastic strips in the roof line? Any of those loose or sticking up? Maybe next time it rains park the other way ans see what happens. Is the carpet at the bottom wet at all?

I removed my roof rack and there are blind nuts in the sheet metal under the mounts. And the bolts were rusted so water does get in there to some degree at least in my experience.

 

[osidesurfer365]

What about the black plastic strips in the roof line? Any of those loose or sticking up? Maybe next time it rains park the other way ans see what happens. Is the carpet at the bottom wet at all?

I removed my roof rack and there are blind nuts in the sheet metal under the mounts. And the bolts were rusted so water does get in there to some degree at least in my experience.

I’ll take a look tomorrow. Thanks for the suggestions. She is at almost 200K mikes so I wouldn’t be surprised if some of the weather strips are cracked or loose.


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[Rocket Man]

What about the black plastic strips in the roof line? Any of those loose or sticking up? Maybe next time it rains park the other way ans see what happens. Is the carpet at the bottom wet at all?

I removed my roof rack and there are blind nuts in the sheet metal under the mounts. And the bolts were rusted so water does get in there to some degree at least in my experience.

The black plastic strips just cover a welded seam that’s sealed. It could leak if the seam sealer has failed but highly unlikely. They’re not weatherstrips, they’re just for appearance.The blind nuts are mounted on the top of the sheet metal in a pocket of sorts, not the underside. There’s no penetrations through the roof. Yes they can rust but like I said they don’t ********* the roof. If you remove the bolts you should replace them so water doesn’t sit in there.

 

[89Suburban]

The black plastic strips just cover a welded seam that’s sealed. It could leak if the seam sealer has failed but highly unlikely. They’re not weatherstrips, they’re just for appearance.The blind nuts are mounted on the top of the sheet metal in a pocket of sorts, not the underside. There’s no penetrations through the roof. Yes they can rust but like I said they don’t ********* the roof. If you remove the bolts you should replace them so water doesn’t sit in there.

I wasn't sure about what was under the black strips, thanks for the info. I siliconed all those bolt holes shut.

 

[89Suburban]

I’ll take a look tomorrow. Thanks for the suggestions. She is at almost 200K mikes so I wouldn’t be surprised if some of the weather strips are cracked or loose.


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She's still young, I got 319K on mine.

 

[Doubeleive]

Water travels down hill.

it does, but....a sponge (or sponge like material) will draw water up, the pad under the headliner is just like a sponge