i just bought a 02 tb LT with the I6 in it and didnt notice the problem with the hvac.. wouldnt have bought if like that if i knew and unfortunately it was (as is) so.... yeah i gotta fix this and am not paying a deal or mechanic to do something i can do with the right info. so i been looking thru the threads trying to find the same problem as mine and ive come close but not exactly. i also have heard the clicking sound when in the hvac is turning on or off. i pulled apart the pieces to the glove box to access the passenger air actuator valve. i removed that and took it apart to see maybe if there was a dead spot but it seemed to be ok except the metal piece was corroded slightly but not with rust. i started with the fuses and didnt make any progress and cant find out what this "trick" is to resetting the temp actuators. i started with the pass. side because the driver seems to be good im guessing that my next stop will be ordering a new passenger temp actuator and seeing if that will fix the bad line in the whole hvac system. if i am assuming to much would appreciate it if anyone could pass along some info. also when i pulled out the pass. actuator i could see the rod that opens and closes the valve but am not sure how it works. turned one way i believe that it only allows heat from the engine and turned the other way is climate controlled but there is no "control" so this is why i think it must be the passenger temp actuator. as mentioned earlier "climate control" only "controls" driver vents, rear vents blow but not with a controlled climate. also the rod that the passenger temp actuator controls, when i turned that by hand and cut off the cold air it was replaced by hot air. its getting really cold outside so that really helped supplying time to make a good buy to fix this problem.. kinda shaky about buying this truck even tho i love the way it drives, the power, the 4wd it has everything u want but most likely the source of all the problems everyone goes thru. Also tomorrow i will be cleaning the throttle body becuz the truck doesnt always like to stay running when switching the the HVAC system so we'll see if that changes.... one last thing if anyone knows how to fix the remote keyless entry system please let me know i tried replacing the battery and holding both buttons close to the sensor but nothing happened.. my 1st post... and its long but ill have more once i make more progress thanks!