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

[Monz11]

Yes, first time doing the cooler lines. It wasn't too bad. But yes, I did cut the hoses, no need to keep them intact. It was much easier to pull them out that way. The dumb radiator clips slowed me down, but I found a video on YouTube that helped with removing them.

I think the shop I took my rotors to get replaced quoted me $600 to replace the transmission cooler lines. I'm rethinking about doing it myself.

I have a truCool 40K Trans cooler and bracket from Atomic Fabrication TruCool 40k Trans Cooler Mount, if you're interested? I just moved, so I can will find it next week and ship. Atomic has awesome motor mounts, too!

 

[iamdub]

At 100k miles I’m not sure if it’s a wise move or if I should just wait until some changes are made to the 2023-2025 Denali’s and send one down to Hennessey before I even bring it home.

Especially if you've had it all or most of them 100K miles, it's just now broken-in. Disabling or deleting AFM can never be done soon enough, IMO. Getting the trans shifting cleaned up with a proper tune should also be done ASAP to help ensure you get as much life outta the trans as possible.

100K is nothing. Look how I celebrated mine reaching 200K

 

[alpha_omega]

I sure have enjoyed the added power of a better cam in my 6.2L. It really is night and day in terms of power between our non-cammed 2007 and our cammed 2012. I didn't bother with the headers or exhaust upgrades because I didn't want to spend the extra money, and the stock system on the Denali flows pretty well. I definitely would make the upgrade if I were adding a blower, however.

If you have the means to buy a new one in that timeframe and have Hennessy do their magic, you'll love it, and I'll love following along on your journey. Every now and then I get the urge for a new one, too. They sure are sweet.

I don’t have a problem with the exhaust. Well not a problem with the exhaust currently, since the gaskets, manifolds have been replaced due to broken bolts. Personally I haven’t done a cam swap since the 90’s, and no longer own an engine hoist, so I would have to find a shop that I can trust to do quality work.
I would much rather prefer to pay more for someone to take their time and do the job right than to get a “deal” on someone rushing things just trying to crank out work. Someone who puts pride in their work vs someone who will argue when their shoddy work is questioned or things go wrong.
The means aren’t an issue on the Henney, it’s more an issue of not being 100% happy with the new Denalis they have put out recently. Yes there are some nice features, but I drove a 2020 for several months while I was working on Omega (‘11) and I wasn’t sold. We shall see what the future holds in their next year or two. I’ll be curious if they end up dropping/changing the AFM from production to save on warranty costs.

Especially if you've had it all or most of them 100K miles, it's just now broken-in. Disabling or deleting AFM can never be done soon enough, IMO. Getting the trans shifting cleaned up with a proper tune should also be done ASAP to help ensure you get as much life outta the trans as possible.

100K is nothing. Look how I celebrated mine reaching 200K

I’ve had it for about half of its [mileage] life, maybe more than half, but I’ve owned it since 2013. It’s lived in a garage all except the first year, but wasn’t hardly driven that winter. She’s done a significant amount of towing and after seeing the condition of the ATF, I can see the need for zip kit, and torque converter in the near future.
So it’s probably best to knock out that stuff and a new cam before the BB tune. But yes, absolutely best to be done sooner rather than later.

 

[Charlie207]

I ordered an oil catch can.

Still hunting down a slow coolant leak.

About to get punched in the d*ck from another blizzard.

 

[Sparksalot]

I only watched them shiver in the cold.

this morning with only ice, and a moment ago.

 

[Rocket Man]

I only watched them shiver in the cold.

this morning with only ice, and a moment ago.

View attachment 362322View attachment 362323

Is that a Texas snowstorm?

 

[Sparksalot]

Is that a Texas snowstorm?

Purely ice and sleet so far.

 

[Fubar0715]

I sure have enjoyed the added power of a better cam in my 6.2L. It really is night and day in terms of power between our non-cammed 2007 and our cammed 2012. I didn't bother with the headers or exhaust upgrades because I didn't want to spend the extra money, and the stock system on the Denali flows pretty well. I definitely would make the upgrade if I were adding a blower, however.

If you have the means to buy a new one in that timeframe and have Hennessy do their magic, you'll love it, and I'll love following along on your journey. Every now and then I get the urge for a new one, too. They sure are sweet.

I am with you! I would love a new one but I cannot swallow down the better part of of owning a house for something that depreciates so rapidly! Good god, they are nice but damn, 6 figures for a fully dressed and tuned vehicle is just not justifiable in my world.

 

[iamdub]

I ordered an oil catch can.

Still hunting down a slow coolant leak.

About to get punched in the d*ck from another blizzard.

Sad emoji negates happy emoji.

I award you no emotions, and may God have mercy on your soul.

 

[Doubeleive]

For those of you who have done so already, did you or would you have purchased a second ECU/PCM to have an “original” on hand and a second one for your deletes/custom tunes?
I know some of you have the emissions inspections, so do those require changing things around for each inspection. Has anyone had their AFM delete reset by the stealership? Or is that a moot point for them right now with all of the recent legal concerns GM is battling?

the BB tune can be installed and uninstalled or vica-versa in less than 2 minutes
that being said I did buy a spare ecu because mine is stuck with a hypertech tune and I wasn't sure if it would smog with the new CA rules but because it has a carb sticker it was fine
so my spare sits on the shelf as a"spare" lol