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

[89Suburban]

Can you get to the bottom side of that panel? Maybe you could grind off or use pliers to collapse the bottom flange of the insert and pull it out without messing with the painted side.

The blind nut material is very thick. I don’t think it will be that easy. Either way you try it you are taking a chance damaging the finish of the panel or the panel itself.

 

[89Suburban]

Washed it then removed the roof rack then washed the roof again.

I didn't know the threaded inserts stuck up as high as they do. The caps I painted aren't gonna be nearly as low-profile and clean as I was expecting. By my tolerances, this is HUGE:

View attachment 236598


I cut the stem off a plain, non-painted cap to test. I planned to apply a thin layer of urethane to seal them and fill what I thought would be a really thin gap between the cap and roof. This gap is about the thickness of a nickel, so the sealant would really show:

View attachment 236599


And these are definitely NOT blind holes!:

View attachment 236600

View attachment 236601

Anyone have any suggestions for removing the footprints? I only have polishing compound and it's not abrasive enough. Should I get rubbing compound or is there something better suited?

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I'm REALLY tempted to just put the rack back on until I can regroup with a better game plan. For now, I put the screws back in with some black Permatex under the head and ran them all the way in.

Did you find a lot of filthy assed grime under the mounts? Can you post pics of the front mount areas?

 

[R3cord303]

True duals and h pipe will get you there

I've never really liked dual exhaust. Gotta add a bunch of hangers, and then the exit pipes aren't ever symmetrical, or one starts to sag after a while, just never seen one on a truck that really looked good or held up well. On cars, sure, but not on a truck. If I find my laptop today I'll update the tune but I'm starting to think I might have to get another one.

 

[mikeyss]

This is how I did my old Tahoe, where the duals are tucked up and hidden.

 

[89Suburban]

Went through the car wash and got his shit going on now.

 

[Sam Harris]

View attachment 236635

Went through the car wash and got his shit going on now.

Do not like. Dammit!
I had that issue right after I bought my Yukon. I just needed to reattach the driver’s door seal as it was hanging down a bit. It wasn’t enough to catch my attention, but after that leak, I found it pretty quickly! Used this stuff to reattach. Worked great!


3M 08008 Black Super Weatherstrip... https://www.amazon.com/dp/B00063X38M?ref=ppx_pop_mob_ap_share

 

[gooffeyguy]

I've done nothing to it yet today. Boy is home from college with the 01 and my wife had to work and drove that. The 2 mustangs are in the garage and the Denali is in it's element.... Lol

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[wjburken]

View attachment 236635

Went through the car wash and got his shit going on now.

Is that the door you replaced the seal on?

 

[iamdub]

I used Meguiars Fine Cut Cleaner on a buffer to get rid of mine.

Thank you. I'll check into this.

I don’t know about the NNBS, only the NBS but Im sure if anyone pulled a rack off a NNBS and didn’t plug the holes, hard data would have filled their truck with water. I know mine are blind.

Ya know- the body style may be the difference here.

 

[iamdub]

Can you get to the bottom side of that panel? Maybe you could grind off or use pliers to collapse the bottom flange of the insert and pull it out without messing with the painted side.

I might could if I removed the headliner. But, they gotta be inside of a roof support, which may be boxed, so even then that may not happen.

My concern is that if they were gone, would the roof be unsupported at those points and be loose? Like, did they engineer these inserts to be specific heights at those points to provide a supported point for the rack as well as hold the roof metal at that plane?

I could easily drill it with a bit that's bigger than the threaded part but smaller than the OD of the head, like drilling out a regular rivet. I'd drill it a slowly, progressing a hair at a time until the head is about to become a "ring" and separate from the shank, then just pull the ring part off. This would leave me with a threaded boss that comes up flush with the roof skin, which would be ideal for my caps. But if the roof skin could then move up and down because that wider head is gone, then I've opened up a can of worms.

I'll have to find a wrecked one to experiment on.

 

[iamdub]

Did you find a lot of filthy assed grime under the mounts?

Of course I did! Dirt, leaf/plant fragments, a beetle or two...

Can you post pics of the front mount areas?

I could, but I won't. It's an area I don't particularly care to draw attention to, what with it's odd downward curve and all. Looks like the roof was smashed in a little.

 

[iamdub]

This is how I did my old Tahoe, where the duals are tucked up and hidden. View attachment 236634

Hidden pipes FTW.

I've always liked dual pipes out the back when done better than just the common way with boring tips. On mine, after deciding that I don't like being able to see the pipe behind the tip even after lowering it, I think I'd like it exiting under and hidden.

 

[iamdub]

View attachment 236635

Went through the car wash and got his shit going on now.

Could just be the gasket around the mirror. If you don't find anything obvious, you're gonna have to dry it, pop off that sail panel and have someone spray it with a garden hose. Start low, all around the mirror then move upward.

 

[wjburken]

Gave the Denali a bath. It was filthy from some gravel road travel

The F150 got a bath as well.

 

[iamdub]

Used it to drag my little trailer to Walmart to get some tires put on Jenn's wheels. First time I got it above 80MPH since the drop and wheels. I don't know if it's the warmer weather or the 22s are that much heavier, but it feels like it has some extra weight on it now. The 22s ride rougher, as I expected from the shorter sidewall and since they're BRICKstone Duelers. But, at least they're balanced nicely.

 

[gooffeyguy]

80MPH with the trailer?

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[wjburken]

80MPH with the trailer?

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

Why not?

My friend has a very nice boat and a guy asked what the fastest he ever had the boat going and he said, “100 mph, but that wasn’t on water.”

 

[Sam Harris]

I used Meguiars Fine Cut Cleaner on a buffer to get rid of mine.

Helping me spend more money as usual Mark. [emoji16][emoji1787]

 

[89Suburban]

Went through the car was and got his shit going on now.

Is that the door you replaced the seal on?

Yes it is. Unbelievable eh?

 

[iamdub]

80MPH with the trailer?

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

Yeah. It's a lightweight 5'x8' expanded metal piece of crap. It's not a boat or anything that could harm anything or anyone if a tire blows.