235-75-R15
P245/75 R16 Chevy stock size
4l60e
16x7
All the speakers in a 1991 Chevy Silverado should be 4x6 if they are stock.
2wd or 4wd?
235 75 15
Stock speakers should be 4x6's
Stock size is Standard 245/75-R16 Stock option size is 265/75-R16
6.5" in the doors. Standard tweeter size (1.25" I think).
they should be 16 you can check on the tire it will say
16 in
235/65/R16