mine is the line on the passenger side. anyone have a part number?

 

Do you have the aux trans cooler? that could determine which hose you need.
actually I think its called a pipe....
If you don't have the aux cooler, you can add it for about $73 bucks from GM parts direct and it will have new lines...
Otherwise you may have to check with the dealer for the part number...

I see a listing for an upper pipe on Amazon for $16...

 

i don't have the aux. and it looks like it's the lower line. i'll try searching amazon. the leak isn't heavy yet. but it's a leak. and i'd rather nip it now. question: is it tranny fluid or anti freeze running through those lines?? and how does it cool? i checked the tranny fluid level yesterday and it was fine. also my coolant level is good too

 

Eventually they all leak. I have 99,350 miles on mine and they started to leak where the metal crimps around the rubber. I had the stealership change 2 lines when i had mine in for work

 

Running through those lines is transmission fluid...
The end caps of the radiator are smaller radiators, one for the transmission fluid and if you have it, an engine oil cooler....

Take your time to troubleshoot it correctly, make sure its the line leaking and not the fitting at the radiator... clean it up and check it after a day or two...

 

The passenger side is the one leaking. Definitely from the line. It's around where the metal meets rubber. The connections at the radiator look good and clean.

 

Hey trainwreck, would it be possible to get a pic of the left side of your radiator showing the connections for the engine oil cooler lines? Thanks!

 

sorry type rod, i guess after looking at so many diagrams and pics i had a jedi mind trick and thought i had the oil cooler lines. so i went out to take pics for you, and to my surprise i don't have them. lmfao.

 

Good thing because I was getting annoyed that my 07 Tahoe didn't come with an oil cooler.... lol Jedi mind trick...

 

LOL, no problem at all!