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Just returned from our first camping trip of the year... first tow with the Quadzilla XZT+ (2000 tune). I don’t know if the XZT has any effect on the engine temperature. I am used to to running (empty) right on the thermostat, a needle width below the center mark (200 degrees). Towing, I previously ran about a needle width above that center mark. I saw the temp climb to 2 needle widths above on grades... but came down coasting / light throttle on the other side. So we arrived at the parking field, shifted to 4 high & were directed to the best spot. They wanted me to circle outside & “drive through” next to another vehicle which I did... but I could not get close enough. I was surprised to notice the temperature climbing to 220. I needed a couple of passes back & forth put the trailer in the right place. Just as I completed the last push back, the temp hit 240 & the RED warning light came on “Check Gauges”. I was in place, so I left the truck running & popped the hood to let the heat out while we set the jacks. The temp dropped to the thermostat level before I shut it off. I had checked all tire pressures before we left. I checked the belt, all fluids were ok. The ground was spongy... with the sod squishing 3” or so. I was gentle as possible with my stock Michelin tires. I didn’t see any breakthroughs though others mucked up other areas pretty good. We had extreem weather during our stay (a bucket in the truck bed was half full) and the ground was worse pulling out. The property owner had a tracked Bobcat on site & several vehicles had to be extracted. There was not a row in front of us initially, but later there was. When the vehicle between the trailer & the exit moved, I quickly got my truck into it. We were able to make the exit in one pass... I was gentle on the throttle but didn’t want to stop... I watched the temps even more carefully on the way home & it was as before... I’d say 200-205. My impression is that the cooling is marginal & that makes me uneasy. I’m planning a thermostat replacement & coolant flush... I know you guys have more experience than me... Ideas?

Last time I was haulin a trailer I was pullin a 13k lb dump trailer and with my chip on high I could not keep the truck coolant very cool.was about ready to overheat. It runs about 190 all the time when not pullin and the fan runs alot.. I dont think it should run that hot when just drivin around. Maby i need to replace the thermostate. I cleaned the radiator and intercooler but it still run to hot I think. Is this normal to run that hot or am i just . Thanks