What's the 2005 gmc sierra crew cab speaker size?

The 2005 GMC Sierra 1500 crew cab uses A6-3/4" front door speaker, 4x6" rear door speakers an tweeters in the front pillars.But why do people want to have an advanced Audio system in the first place Lets start with the main reason why people will consider a new car Audio system: the sound quality. Its no secret that the factory radio and speaker systems on a standard car arent great, and theyre even worse on the older models. Replacing even just Your radio or Your speakers as separates should give You a noticeable boost in Audio quality, making listening to music and podcasts a much more enjoyable experience.