Just do some measuring of the flat surfaces that aren't already dampened.
The good news for you is that a DeVille probably already has a lot of sound deadening done to it in the factory. Unless you're hearing some road or tire noise entering the cabin through the doors or floorpan, I wouldn't worry about doing the whole car.
If you have subs in the trunk, that might need some re-enforcement there.
I've done an entire car before, and it's not a lot of fun. That was a Honda, so it was probably only about 60% of the work you would have to do!
One thing I would suggest, look into the "generic" versions of DynaMat. You'll save a lot of money.
The foil-backed stuff is really good, but messy once it gets hot. In NY you may not encounter the same kind of summer heat I do down here. I had some tar-like glue dripping and oozing around in my trunk under the carpet. Once you put it on, don't expect to take it off.
Good luck!
The good news for you is that a DeVille probably already has a lot of sound deadening done to it in the factory. Unless you're hearing some road or tire noise entering the cabin through the doors or floorpan, I wouldn't worry about doing the whole car.
If you have subs in the trunk, that might need some re-enforcement there.
I've done an entire car before, and it's not a lot of fun. That was a Honda, so it was probably only about 60% of the work you would have to do!
One thing I would suggest, look into the "generic" versions of DynaMat. You'll save a lot of money.
The foil-backed stuff is really good, but messy once it gets hot. In NY you may not encounter the same kind of summer heat I do down here. I had some tar-like glue dripping and oozing around in my trunk under the carpet. Once you put it on, don't expect to take it off.
Good luck!
