hey my name is tony, and I have a 94 suburban as my first car/TRUCK. I LOVE HER LIKE CANDY, but

I came out of the gym this evening and noticed a huge coolant leak coming from the back end passenger side. It's freezing up here in Montreal, so I wasn't able to get underneath and check, but it seems to be coming from above the leaf springs and it drips of onto my mud guards. IT'S A PRETTY BIG LEAK, MY COOLANT RESEVOIR WAS ALMOST EMPTY WITHIN 2 HOURS. is it hoses or something else. THANKS GUYS!!!!!