alright so ive been reading threads all day and havent found 1 that really takes it home for me i have a 2005 lly with 200k on it. i recently had it serviced and flushed of all fluids. i now have a low coolant light that constantly comes on. i seem to always have constant pressure even when my truck sits over night. i just replaced the cap a few days ago on the tank to try to solve that with no success. also my coolant tank seems to be draining to about half full or less ive tired burping the system which seemed to help at first because i got heat quicker but the coolant light came back on and the tank was low again. i put a bottle on the overflow to see if i was losing any there but the bottle was empty. ive tried all i can think of so far any suggestions?