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

[iamdub]

But that's the plastic one with hoses. Im looking for a stainless steel y pipe

I don't know of anyone that makes a stainless Y-pipe, at least not mass-produced. Dorman makes theirs out of aluminum:
CLICK> https://www.dormanproducts.com/p-91571-626-553.aspx <CLICK

Product Description​

Original equipment HVAC heater hose assemblies often fail due to cracks in the plastic Y-connector. This Dorman OE FIX replacement features an upgraded aluminum Y-connector to prevent similar failures in the future.

• Upgraded material - this replacement engine heater hose assembly features aluminum Y-connectors for added durability
• Application specific - designed to match the original fit and function of heater hoses on certain vehicle years, makes and models
• Complete replacement - hoses come with necessary clamps for easy installation
• Quality engineering - designed in the United States and backed by decades of automotive aftermarket experience

It's definitely aloominnyum:







Now, THIS part is plastic, but you'd remove it to slip the hose over your Grüven T fitting:



I replaced that hose, as well as the other 5/8" hose with (I think) Gates.

 

[Sparksalot]

New radiator is in. Took about 3 hours total, plus had to do zero fan shroud trimming. took quite awhile to remove and reuse the return line restriction. It’s about a 1/8” opening.

 

[Rocket Man]

New radiator is in. Took about 3 hours total, plus had to do zero fan shroud trimming. took quite awhile to remove and reuse the return line restriction. It’s about a 1/8” opening.

Pics or it didn’t happen. You know the rules.

 

[Sparksalot]

Pics or it didn’t happen. You know the rules.

 

[Sparksalot]

 

[RooTBeeRthe1st]

View attachment 359778View attachment 359779View attachment 359780

Why is your core so thin?

 

[Sparksalot]

Theothertwin came in handy as a layout space. The a$$ end of thecopcar is kinda full.

 

[Sparksalot]

Why is your core so thin?

It’s actually twice the thickness of the original.

 

[Sparksalot]

It’s actually twice the thickness of the original.

The tanks are also HUGE. The system still took 4 gallons of coolant to fill, even though the engine was not drained.

 

[Sparksalot]

for the restriction, I cut the original piece from the old radiator. It’s inline in the overflow at the reservoir end.