6L80 6L90 8L90 Sure Cool System Upgrade STL010

This product works as described, and is fairly easy to install following numerous videos that are available online. I was also changing my transmission filter and fluid at the same time, but as a guess, if I were to just install this bypass it would probably be about a 15 minute job. The hardest part of the whole job is getting the snap ring out of the housing as mine was a bit dirty/somewhat corroded and stuck. A couple blasts of brake or carb cleaner and some compressed air helped. All-in-all, not really any gotchas with this job other than to make sure to clean everything and that the o-rings stay on the cooler lines. I also purchased a replacement gasket, just in case, but the factory gasket was fine and I just reused it.As far as function goes, this product does what it says. Prior to installing on my 2020 Yukon, the transmission temp would quickly climb to 195°. Now, it generally runs much cooler, and maxes out at <150°.This so far has been a great mod, and is worth the price and minor effort to install.