I have a 99 v6 blazer 4wd and I am loosing coolant. I can smell it but can't find the leak! I do have a puddle under my Blazer and it looks to be dripping down the left side of the engine/transmission. I warmed up the engine and even drove it but I still can't find the leak. All radiator hoses are dry to my knowledge and I replaced the water pump 2 years ago. Please help!

 

maybe it is coming from the engine block. you could have a bad gasket or something like that

 

I will assume that the puddle is coolant and not just condensate from the A/C system (since you said it was on the left-driver side which is opposite the condensate drain). It is possible that the driver rear freeze plug is leaking or you have a faulty intake manifold gasket (more likely than a freeze plug).

 

I had a very similar coolant leak such as yours in a 97 6cyl Vortec. It was a head gasket leak. Dealer repair was $648.00 (parts and labor)

 

i had the same thing happen to me, it was an intake manifold gasket and it was around 600 parts and labor