Trans coolers
While towing our 3000lb travel trailer with our 2011 Yukon xl 1500 5.3 litre I found that it does ok for the most part but the transmission did get up to 220 degrees going over Macdonald pass in Monta...
Forum Discussion
I like to see trans temperature reach 220 occasionally. Water condenses in the trans oil and needs to be boiled out occasionally.
