Major operation. If you still wanna do it yourself, get a manual, like a Chilton, and follow it exactly.
no
I couldn't find one in the fuse layout page of the manual that came with my 1987 Grand Marquis. I would assume not.
Common mechanic's handtools. No special tool is needed.
18 MPG.
The factory radio on a 1987 Mercury Grand Marquis is made to play local radio states and cassette tapes. It is connected to a high fidelity sound system.
Clarify....Are you talking about an AMP for a Stereo?
According to my Chilton's Auto Repair manual : A ( 1987 ) Mercury Grand Marquis has a ( 20 U.S. gallon gas tank )
autozone.com
change out the heater core
NO a grill from a 87 will not fit a 91. Only a grill from 88 , 89 or a 90 will fit. They don't even look the same.
under the dash, driver side floor
20 gallons , according to my Chilton book