Front...4x6 Rear...6x9
4X6
Crutchfield.com says that factory speakers in the 1998 Chevy Cavalier Sedan are: 4" x 6" door speakers and 6"x 9" rear carriage speakers.
4x6 inch
The 1989 Chevy Cavalier dashboard speakers measure 4.5 inches in diameter. There will be a speaker on each side of the dashboard.
The rear speakers are 6"x9"
3-1/2"
15 inches
15 Gal
5X7 front and 6X9 rear on my 96 coupe
15 millimeter
5 1/4 inch
as long as the transmissions are the same yes but there may be a wiring difference as well as cv joint size difference