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

[j91z28d1]

Have heard that too!

But then, what difference does it make if it's backwards when the hoses are the same size?
It goes through the heater core backwards? Shouldn't matter?

I believe in general water flows from bottom to top so that air doesn't get trapped?

I don't know haha.

 

[mikez71]

I believe in general water flows from bottom to top so that air doesn't get trapped?

Sounds good!

Although on my Tahoe the heater core connections are both on top tank.
Looks to be partitioned and flow in a 'U' flow pattern.

 

[Fless]

Have heard that too!

But then, what difference does it make if it's backwards when the hoses are the same size?
It goes through the heater core backwards? Shouldn't matter?

The "ts" are slightly different angles for the lines to the rear heat.

 

[Doubeleive]

The "ts" are slightly different angles for the lines to the rear heat.

and for reference the k2's use the same T's they are just swapped positions, which I recently found out

 

[j91z28d1]

Sounds good!

Although on my Tahoe the heater core connections are both on top tank.
Looks to be partitioned and flow in a 'U' flow pattern.
View attachment 442090

ha.. yeah I got nothing.

 

[Sparksalot]

Sounds good!

Although on my Tahoe the heater core connections are both on top tank.
Looks to be partitioned and flow in a 'U' flow pattern.
View attachment 442090

Yep, heater cores usually have both connections at one end, but the tank has a baffle.