Blazer has no heat, runs and drives fine but after about 5 minutes smoke starts pouring out from under the hood, on the drivers side only.

When the car is parked, AFTER running for a bit, coolant is leaking from roughly the same area. No coolant in the oil. Hoping its something stupid...? Anyone have any insight?

Truck also takes a while to warm up in the morning.. If not it'll bog down and stall. Once its warm truck runs great. Not sure if these are related issues but figured id throw it out there.