I did i compression test on my 08 LNF because for the last week I've been obsessing over the possibility of me having a cracked block. The compression test turned out fine and the car seems sealed. The oil isn't milky, the coolant isn't contaminated. My father is a certified mechanic and i had him looking at it and he said its okay. I work at a Chevy dealer and the tech's in the shop looked a it and they said its okay. So my question is..

Why the **** am i still losing coolant...

 

does it smoke at all? when you first start it or anytime?

 

check the bottom mounting points of ur rad, I had mine break off, no leaks though, but others have broken and leaked. if its that, buy a full aluminum one from zzp.

 

I figured it out, their was a air bubble in the rad from a flush i did last week. Seems to be all good. but no the exhaust isn't burning coolant, it smokes for a minute when i first turn it over and then it stops.