Kitchen Faucet is loose on granite counter

Needs to be tightened from under the sink, may need a right angle faucet wrench, they are about $10, or you can try and snug it up by hand, hope this helps?

There is a nut up under the counter its hard to see but tighten that . Most faucets come with a special tool fo hat but can be done with wrench

Probably a loose fixture nut under the counter behind the sink.
Yeah ya gotta pull out everything and crawl up into the cabinet on your back and see if the nut (right up at the granite, above the hot and cold inlet pipes) is loose. If it is THEN you'll need to tighten it. Wrench, slip-joint pliers or a basin wrench. (probably basin wrench which is a specialized tool made for reaching up into tight places)

There are screws that come up through the bottom. You may have to remove the faucet to tighten it. While you have it out, throw it away and buy a new one.

from underneath,may be really tricky to get a grip on you might need a basin wrench.

yes there is, with a pair of slip joints you can tighten from underneath, it is above the supply line, the best thing to do is turn off the water, disconnect the supply line and tighten the nut, then reconnect the supply line and turn back on the water. Good Luck Tim

looks like you'll have to remove it and examine it. Brass is a soft metal, I hope you've not stripped out the threads, Grohe is an expensive faucet. i fall else fails and the hreads are stripped out, I might try a tough adhesive caulk like a 3M 5200 marine grade. Apply liberally from the bottom. let it set firmly. Perhaps tape a piece of cardboard over the hole in the countertop from the bottom. this would keep the caulking from falling out before it sets. unconventional, but something to try before buying another $200 faucet. what have you to loose?

new plumber

there are mounting plates underneath the counter which fasten the faucet to the counter.This unit will need a small allen wrench if memory serves me correctly...keep in mind that all moen faucets are lifetime guranteed and alot of folks do not take advantage of this amazing warranty which makes these the most desirable faucet on the market.however the need to tighten this faucet prob isnt a warranty replacement procedure but can be determined once mounting items and faucet is inspected...good luck

there is a couple of plates with a little screw in the center that tightens up the plate got to tighten it up