You shouldn't even attempt to attach it directly to the granite unless the manufacturer of the top says you can. Some alternate fastening methods are described at the following link:Originally Posted by congruent
LINK > We're installing a new granite counter top and need to know how to fasten our built in dishwasher to it.
Ideally I believe a wooden sub-top should have been installed under the granite but then I'm not a counter top installer by trade.
The Appliance Information Site