Carlos2500

I have an 02 Silverado 2500HD and i keep on having transmission fluid over heating issues, i had the transmission replaced once and after driving truck for 18-25 miles i would get a warning light saying the transmission fluid is hot, i was told i might have my lines dirty, i flushed them, tested the truck, same issue, i was told to replace transmission cooler, did that, retested, same issue, i replaced the radiator as-well and same issue, we went as far as to replace the transmission one more time and i re tested last night and once again im having the same issue, i started to think the transmission might not be overheating and it might be just a bad reading but its 2 transmission now so i have no clue now, ** note , my original transmission blew because of low atf and i did get the same Trans hot message before it completely stopped working, i was thinking maybe it stayed in the system but im not sure, does anyone have an idea what it can be? Id greatly appreciate any feedback, thanks