2018 Suburban Radiator provide cooling of transmission fluid

[SLC2]

I have 2018 Suburban with 6L80 Trans and 5.3L engine. I am chasing a high temperature problem for the transmission. I am wondering if all such suburbans have passages in the radiator to cool the transmission fluid. I was trying to get a temperature reading with a infrared temp gun off of the trans lines into the radiator and could not find the  the trans lines into the radiator. I know that on some 2018 suburbans there are trans lines into the left side of the radiator, but I can't find such lines on my Suburban. So what I am looking for is definitive confirmation that some suburbans do not have transmission fluid lines into the radiator.

[davester]

Maybe look on the transmission to see if the trans cooler lines are present there, then follow them forward?