Front speakers Front Door: 6-3/4" factory speaker note Far rear speakers Rear Pillar: 4x6" factory speaker note
6.5"
6.5
The speakers in a 2006 GMC Sierra 1500 crew cab are 6.5 inches. However, the speaker manufacturer will refer to this size as 6.75 or 6 3/4 inch speakers.
6.5" in all four doors
The speakers in a 2007 Chevy crew cab are around six and three-quarters inches. However, if replacing the speakers, an adapter plate will be needed no matter what size is used.
I believe that they are 5 1/4. Go to Crutchfield.com they will hook you up with all the sizes and specs.
Yes u can go bigger if u want
The Sierra is a truck that is manufactured by General Motors Corporation. Currently there are three versions of the Sierra which include the regular cab, crew cab and hybrid crew cab.
crew cab door speakers are 6.5"
he is from Sierra Leone
Crew - 2007 was released on: USA: 24 July 2007 (limited)
6.5"