What specifically do you mean by "in the back"? If it's leaking down the back of the engine it could be the intake manifold, head gasket, heater hose connection, heater hose or rusted freeze plugs. But you can't know until you inspect for the source of the leak. That means getting right down there, maybe under the vehicle and have a bright light with you. If it's a coolant leak there should be a buildup of colored coolant deposits that leads right to the leak.
Good luck.
96 chev leaking out everywhere
leaking in large amounts? i would check a cracked hose.
leaking past the rings
Mercury made the tracer, not Chevy
Try to find out where it's coming from. Often coolant will leak down the front of the water pump, under the pulley. Even if you don't see the coolant, look for the mineral trace of the water. By the time you notice a leaky water pump it has usually been leaking for a while and has left a noticeable trail. If you don't notice coolant leaking there, check other places, freeze plugs, the sides of the radiator, radiator and heater hoses... Again, the coolant and water minerals typically leave a nice bright trace to tell you where it's leaking. If the radiator is leaking, don't try to fix it yourself and certainly don't put stop leak or any other chemicals in it. Either replace the radiator or take it to a radiator shop and have THEM repair it properly.
You have a coolant leak. Look for an obvious drip or wet spot or have the cooling system pressure tested.
if it is lowering oil and water both and is not leaking it may have a blown head gasket and it is going out the tailpipe
Stuck closed thermostat or a bad head gasket.
look for a plug on a coolant pipe that has 1 black and 1 yellow wire that will be the coolant temp. sensor
blown Head gasket/warped heads/cracked block
Head or Intake Gasket leak.
Heater core under dash and console leaking