Hi All, the 2012 XL Denali is a towing beast, but after the cam upgrade, new HD torque converter, and adding the Tru-Cool 40K in front of the radiator, the engine itself is running warm now that we're getting into spring. Hauled our 6500 lb camper down to Virginia Beach this weekend in 83º ambient weather, and the engine coolant temps were running between 227º and 237ºF per the OBD2 stream most of the way, which translates to about 3/4 up the temp gauge on the dash. But that was only at speed... at idle in traffic it was running much cooler, around 205º. So that tells me that my fans are working fine (verified as well), but that the Tru-Cool cooler is likely robbing some of my radiator's capacity when the engine's working hard. Transmission stayed nice and cool the whole way, never getting above 180º.
After reading a bunch of posts from all of you, especially @kbuskill's experience with his Cold Case, I went with a GMT569A as I have oil coolers on both ends of my factory radiator. I like the fact that it's a 2-row with 1-1/4" wide tubes and is significantly deeper than the factory radiator. Hoping that this upgrade will finally make this truck what I want it to be for our summer camping season, including a 4000 mile trip west out to Yellowstone.
Anything else you guys can think of to shore this truck up for camper duty?
After reading a bunch of posts from all of you, especially @kbuskill's experience with his Cold Case, I went with a GMT569A as I have oil coolers on both ends of my factory radiator. I like the fact that it's a 2-row with 1-1/4" wide tubes and is significantly deeper than the factory radiator. Hoping that this upgrade will finally make this truck what I want it to be for our summer camping season, including a 4000 mile trip west out to Yellowstone.
Anything else you guys can think of to shore this truck up for camper duty?
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