He's not in the Giant Chasm, you need to progress through and exit, into a glade. After walking around it, you'll find a small crater in the middle. Suddenly the area will be frozen over, allowing you to get past the trees at the top. There is another cave entrance, Kyurem is right there.
in north of giant chasm
giant chasm
just keep walking
Giant Chasm on Route 13 east of Lacunosa Town
you can catch it in giant chasm after you beat N and ghetsis.
north of route 13 in the giant chasm. mrgabor7
The Giant Chasm. Look up a video of getting there on YouTube.
The Kyurem there is at level 75.
Yes, you catch it in the Giant Chasm.
You'll have to go to the giant chasm. But first you need to beat the game.
go to the giant chasm near laconusa town and vs him
Go to the Giant Chasm and go as far as you can go and its in a cave at level 75.