The 2004 GMC Sierra comes with a standard six-speaker system. The speakers are located in the front doors, rear doors and in the center of the dash. The door speakers are four inches in diameter and the dash speaker is six inches in diameter.
03-07 DOOR SPEAKER UPGRADE!
2004 GMC Sierra speakers come in a variety of sizes, but the most common size is 6.5 inches. There are also a few models that come with 8-inch or even 10-inch speakers, but these are less common. If you’re looking to upgrade your stereo system, then upgrading to larger speakers is a great way to improve sound quality.
Just make sure that you get the right size speakers for your particular model of truck so that they fit properly.
2004 Gmc Sierra Door Speaker Replacement
If you’re looking to replace the door speakers in your 2004 GMC Sierra, there are a few things you’ll need to know. First, what kind of speakers are you looking for? There are many different types and sizes of door speakers, so it’s important to choose the right ones for your truck.
Second, how do you plan on attaching the new speakers? Most door speakers will require some sort of mounting bracket or screws. Third, what is your budget?
Door speakers can range in price from a few dollars to hundreds of dollars, so it’s important to know how much you’re willing to spend.
Once you’ve answered these questions, you’re ready to start shopping for new door speakers! To get started, simply search online for “2004 GMC Sierra door speaker replacement.”
You’ll be presented with a variety of options from different retailers. Compare prices and reviews before making your final decision. Once you’ve found the perfect set of door speakers, simply follow the instructions provided by the manufacturer to install them.
And that’s it! In no time at all, you’ll have new door speakers that will greatly improve the sound quality in your GMC Sierra.

Credit: www.ebay.com
What Size Speakers are in a 04 Gmc Sierra?
If you’re looking to upgrade the audio system in your 2004 GMC Sierra, you might be wondering what size speakers are already installed. Here’s a quick rundown of the factory speaker sizes in this truck model:
The front doors each house a 6.5-inch speaker.
The rear doors each have a 5.25-inch speaker.
There is also a 6×9-inch speaker mounted in the center of the dash.
All told, it’s not a bad little system as far as factory setups go.
But if you’re looking for some serious bass and better overall sound quality, you’ll definitely want to consider upgrading to aftermarket speakers (and maybe even an amplifier or subwoofer). With some careful planning and execution, you can put together an awesome stereo system that will make your Sierra sound great both on the highway and offroad.
What Size Speakers are in a 2004 Gmc Sierra 2500?
The 2004 GMC Sierra 2500 comes standard with six-speaker audio system. The optional eight-speaker system includes two additional tweeters mounted in the A-pillars. Both systems use 6″x9″ Woofers in the doors.
How Big are the Door Speakers in a Gmc Sierra?
The door speakers in a GMC Sierra are 6.5 inches in diameter.
How Many Speakers Does a Gmc Sierra Have?
A GMC Sierra has six speakers. The front doors have two speakers each, and the back doors have one speaker each.
Conclusion
The owner of a 2004 GMC Sierra wonders what size speakers are in his truck. After doing some research, he finds out that the front doors have six-inch speakers, the rear doors have five-inch speakers, and the center console has an eight-inch subwoofer.