Can't seem to find out what size speakers came stock on the 1987 Buick Grand National. My dad needs one of them to be replaced, so i gotta try and find something OEM to keep it as original as possible.

Any help would be great

 

3.5 round in the dash,5.25 in the doors,and 4x10 in the rear deck.If you have the Concert Sound option the dash speakers,and the door speakers are wired together.

from a GN forum , just as I thought, it is just like the monte carlo's of the same time.

 

IMO, he needs another turbo, not speakers...
Think GNX

Just how often do you bug your pop to use it?
Hell, ask him for meeeeeeeeeeeeee!!!

 

I have never seen a Regal/Cutlass/Monte with factory door speakers. If replacing the dash 3.5s be sure to get ones where the tweeter does not protrude past the top of the edge of the speaker. That goes for pretty much any GM dash mounted speaker.

 

nonono , as sum1 on this forum once said , "theres no replacement for displacement" , get a lil ol 455 , drop right in

 

my SS had factory doors

 

Pass everything but the gas station lol

Must be damn hard to do a good number in a G-body!!

 

the car just rolled over 30 000km all original, only thing not original is the battery. i am quite sure there is door speakers so thanks for the help

 

no ? hm.

 

id rather have a turbo-ed GN then one with a 455.. nothing sounds better then a BOV at 30PSI of boosts!