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To the best of my knowledge, ALL current generation GM full-size SUV's have an external transmission cooler from the factory.Towing a 6500 camper. Can I install a external transmission cooler or go to a Chev Dealer and have them install
They do, but the max tow package gives you an upgraded (larger) one. I refuse to buy one without this option.To the best of my knowledge, ALL current generation GM full-size SUV's have an external transmission cooler from the factory.
That looks like the one I had that was traded in at Sterling Chev in Illinois. Now have a Tahoe RST with the 6.2 and looking at adding a extra trans cooler. We live in Colorado and not liking the temps in the transmissionI just got a used 2021 Yukon Denali with 6.2L (but not max towing) and as part of the deal tested towing a 5300lb trailer up a 10mile 5% grade at 107F ambient last Aug.
Transmission reached 200F which according to comments is significant but not that extreme for short duration, minimal occurrences. I'm not qualified to say if you need extra cooler but for me, based on what I've read here I'm OK with short duration, 200F transmission temp on hottest day of the year, and don't plan to add an extra cooler. In my use pattern, this might occur once a year.
Since then, have done about 5000miles of towing over 10-15 similar mountain passes at milder 80F, 90F ambient and the temp gauge has stayed < 180F.
Maybe try things out and see you're temps before spending $?
I did add a Curt brake controller and it works OK.
By how much are you not liking the ATF temps?We live in Colorado and not liking the temps in the transmission.
One of the lessons we've learned on the earlier generation 6.2L trucks is that it's pretty hard to improve on the factory cooler performance without incurring other losses. For example, I replaced the factory external cooler with a Tru-Cool 40K on my 2012 Yukon XL Denali. It kept the transmission really cool, but I suddenly started having to deal with engine cooling problems in the mountains because it was dumping too much heat in front of the radiator. Other 6.2 owners reported similar results with it.That looks like the one I had that was traded in at Sterling Chev in Illinois. Now have a Tahoe RST with the 6.2 and looking at adding a extra trans cooler. We live in Colorado and not liking the temps in the transmission