Yes you can put 6 speakers in a silverado, by instaling a 4 chanels amp for the front, and mono amp 1 chanel for the sub
6''x4'' and 6 1/2''
Front Door Speakers are 6-1/2"
4 x 6
4×6
6 1/2" on front and back doors.
6 3/4" Front Speakers and 4x6" Rear Speakers. Source: My 2000 Silverado LT Ext Cab 4dr 4x4 with Z71 pkg.
The door speakers are 6 1/2 " round...still looking for the size of the rear ones.
They are 6 1/2 inch in the front door panels. If its an extended cab the rears are 4 x 6 inch. Let me tell you from experience replacing the rear speakers in a 97 extended cab is a pain, but can be done. Be cafeful not to break the panel clips then your panels will vibrate when the speakers are turned up.
1988-1999 Chevy and GMC full size the door speakers are six and a half inch on the extended cab the pillar speakers are 4x6 in. Some Silverados also had a small tweeter inside the door.
the ones in the door are 6.5...but depending on the speaker a 6 inch will fit too
I believe its 6 and 1/2 inches and for the one on the arm rest on the door a 4 by 6inch
Front speakersFront Door: 6-1/2" factory speaker noteFar rear speakersBehind Seat: 4x6"