Oil coolers, standard or option?

[tom3]

Looking at the RPO codes on our 2019 and I see KC4 and KNP for engine and transmission coolers. Are these standard equipment on most Tahoes or an extra cooling deal. This a 5.3 4x4 and 6sp with trailering package but a 3:08 gear.

 

[drakon543]

the transmission cooler used to only be part of the tow package. oil cooler as a standard was a thing since atleast the 90s

 

[tom3]

Thanks. I had looked all over for a cooler add on and didn't actually find one so I suspected it was the standard deal. Been looking for the lower temp transmission thermostat but it's out of stock or on backorder everywhere that I've looked.