Hello everyone...new to the forums and thought i'd give it a shot trying to get some assistance. I have a 93 s-10 blazer 4x4 with a 4.3L vortec. Lately I've noticed a serious drain on my coolant levels and increased smoke when i start it up. After start up the smoke goes away and everything seems to be fine. When i first noticed the smoke it was minimal and i decided to do a radiator flush and sealant and to be truthful it made the smoke worse. I put some coolant and and it disappears from the reservoir. I've searched all over the engine for leaks but cannot find anything. Oil level seems fine and the confusing thing is that it doesn't run hot. Any and all help would be appreciated.

 

Sounds to me like you have an internal leak and the coolant is being cooked away.

I'd look at the intake manifold gasket and head gaskets, were I you.

 

I'll try takin a look at it today and get back with the info