2003-2007 Chevrolet Silverado 1500 extended cab

2003 • 2004 • 2005 • 2006 • 2007 Classic


Matt Holliday

Matt Holliday was one of Crutchfield's ace car enthusiasts for several years. He brought a lifetime of knowledge and experience to our team. He has since left the company to join the family business and pursue other interests.

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This article is an overview of your vehicle's audio system and its upgrade options. Looking for step-by-step instructions on installing a car stereo or speakers in your Silverado? We'll include a Crutchfield MasterSheet™ free with your Crutchfield order, or you can purchase one for $9.99.
Chevrolet Silverado 1500

2003 Chevrolet Silverado 1500 Extended Cab (Crutchfield Research Photo)

Overview of the Chevy Silverado 1500 extended cab

Chevy’s Silverado is a workhorse, one of the most popular vehicles on the road today. GM built this particular version from 2003 to 2006, and then kept it on as the 2007 Silverado Classic when they switched to the new body style.

It’s a great-looking truck, but the factory stereo comes up a little short. There are plenty of ways to bring it up-to-date with better sound and extra features that’ll make your Silverado an even more enjoyable daily companion.

Chevy Silverado

The 2007 Chevy Silverado "Classic" (Crutchfield Research Photo)

2007 Chevy Silverado Classic

The all-new 2007 Silverado (Crutchfield Research Photo)

Note: The chassis discussed here, known inside GM as the GMT800, was replaced by the new GMT900 models in 2007, but still hung around for another year as the '07 Silverado Classic. If you have an '07 and you're not sure which version you have, check the exterior photos above and see which front end looks like your truck. If yours looks like the more subtle new Silverado, see our profile for the 2007-2011 Chevy Silverado.

Factory stereo system

Silverado factory radio

The factory radio also includes the truck’s warning chimes. (Crutchfield Research Photo)

These Silverados were equipped with a 4" tall AM/FM CD player, with options for XM Satellite Radio, OnStar®, and a Bose® speaker system. You can install almost any 2" tall (single-DIN) or 4" tall (double-DIN) stereo in the dash opening, but you’ll need to use a hacksaw to remove the metal support bar behind the factory radio to install any car stereo that's over 6-3/8" deep. A receiver with a flip-out screen won't work in this truck, because the dash overhang won’t allow the screen to fully extend when open.

You'll need a mounting kit to trim out the new stereo, a wiring harness that allows you to connect it without having to cut the factory wiring, and an antenna adapter that connects the Chevy antenna plug to your new radio. Crutchfield includes these installation parts at a very deep discount with your receiver order. You'll also get our step-by-step disassembly instructions.

Silverado dash trim removed

You’ll have to remove a large dash piece to get to the old radio. (Crutchfield Research Photo)

You’ll need an adapter that allows you to retain all safety and convenience features, like the factory warning chime and OnStar. If your truck is equipped with the factory satellite radio option, you’ll lose it when you replace the factory radio. You can always pick a stereo that offers satellite radio reception, either from a built-in tuner or an add-on tuner, then call SiriusXM to transfer your subscription.

If your truck is equipped with the Bose system, you'll need a wiring interface to connect your new stereo to the Bose amplifier and speakers, while retaining all warning chimes and OnStar functionality (if activated). When you put the stereo you want in your cart, we'll show you what's available for your truck, and which features you'll be able to retain. You'll also get a discount when you add them to your order.

Steering wheel audio controls

It's relatively easy to retain your Silverado's steering wheel audio controls when you install a new stereo. When you enter your vehicle information, our database will choose the adapter you need to make your factory steering wheel controls work with your new receiver. These adapters also get discounted when you buy them with a new stereo.

Tools needed: Panel tool, hacksaw blade (to remove rear support), 7mm socket, ratchet and extension.

Replacing your factory speakers

Silverado front door panel

This Silverado's front door holds a lot of speaker (Crutchfield Research Photo)

Front door speakers

The stock front door speakers in the Silverado are 6-1/2" models, a common size with great aftermarket support. They utilize a simple clip-in plate for easy removal and installation, and you won’t have trouble finding a speaker to fit any musical taste or budget. You can put a 5-1/4" or 6-1/2" speaker in the front door with the help of an inexpensive mounting bracket, and you can even fit the slightly larger 6-3/4" speaker in there if you’re willing to drill some new screw holes.

Crutchfield includes the mounting bracket (if needed) and speaker wiring harnesses with every speaker order. Trucks with the Bose system will have a tweeter up in the pillars. Non-Bose vehicles may have a tweeter next to the speaker in the door.

Bose tweeter in the Silverado

The Bose tweeter is located in the front pillar (Crutchfield Research Photo)

Tweeters (Bose® system only)

Your Bose-equipped Silverado will have tweeters in the A-pillars. You’ll notice the small grilles just above the dash by the windshield.

These are also easy to remove, and offer a handy mounting spot for an aftermarket tweeter. You’ll have to fashion a mounting plate with our universal backstraps to install a tweeter in the pillar. Some tweeters include adjustable brackets for locations like this.

Rear door speaker

The Bose rear door speaker is a round model in a 4"x6" bracket. (Crutchfield Research Photo)

Rear door speakers

You’ll find 4"x6" speakers in the rear doors in this extended cab Silverado, or if you have the Bose system, a round speaker in a 4"x6" bracket. Once you’ve removed the door panels to get these speakers, they’re extremely easy to take out, thanks to their clip-in plates.

You can install 4"x6" and 4"x6" plate speakers in these openings, or go with a 4" or 3-1/2" if you prefer. You’ll have to drill new screw holes no matter what you put in there, and we recommend using speaker baffles to act as gaskets because the new speakers will have some air gaps around the frames once installed.

Tools needed: Phillips and flat blade screwdrivers, panel tool, 7mm socket, ratchet and extension, drill with 1/8" bit, Torx T20 driver for 2005-up models

Chev ySilverado sub speaker

A closer look at the factory sub — it's a slightly oblong 6-3/4" subwoofer (Crutchfield Research Photo)

Bass in your Silverado

Some later models with the Bose system have a powered subwoofer mounted in the center console. You can remove this sub and its small amplifier, and replace it with an aftermarket sub if you power it with a new amp. We don’t recommend this option, though, because removing and replacing this sub will require a truly vast amount of time and effort.

Here’s a better way to get great bass in this Silverado: You’ll find a large assortment of aftermarket vehicle-specific sub enclosures that are designed to fit into a variety of locations in this truck. Many of them are already loaded with a sub, and some even include a built-in amp. These sub enclosures install neatly in your truck, so you'll get plenty of bass without losing valuable cabin space.

More options

There are plenty of other ways to improve your Silverado. Here are some of the ways Crutchfield can help.


Like most pickup trucks, the Silverado has a noisy cabin. If you really want to hear your music without taxing your speakers, add an amplifier. There are plenty of inexpensive options that will give you the ability to hear your music loud and clear, especially when paired with some upgraded speakers. Mounting options abound; a best bet is under the front or rear seats.

Satellite radio

If your Silverado came from Chevy with satellite radio, you’ll lose it when you remove the factory stereo. Thankfully, there are plenty of aftermarket receivers that will work beautifully with an outboard SiriusXM satellite radio tuner. You can also buy a Dock & Play radio, which will allow  you to enjoy your favorite satellite radio programs in your truck or in your living room.

Security and remote start

Installing a security system in your Silverado isn't easy (security systems rarely are), but it's less complicated than it could be. Our Crutchfield Advisors can help figure out what you need to get the job done, but we usually recommend taking your truck and your new gear to a professional installer.


An in-dash navigation receiver is an excellent option in this truck, if you’re willing to cut out the support that held up the factory radio. Or you can use a portable navigation unit, which you can move between vehicles as needed and keep tucked in a storage compartment when not in use.

3 ways to upgrade the audio system in your Silverado

Quick & easy: This truck is easy to upgrade, so go ahead and swap out the front speakers and replace the factory stereo with a stereo that puts out more power. The difference in sound quality will be impressive, even if you keep the Bose amplifier. Your options for an aftermarket stereo are almost unlimited once you knock out that rear support, so spend a little more on a deck that you can upgrade in the future (preamp outputs, Bluetooth® functionality, iPod® adapters, etc.). You’ll need to pick up a couple of adapters to retain features like OnStar, steering wheel controls and door chimes, so factor that into your budget.

More bump in your truck: Once you have a new head unit with preamp outputs, expand your system with some amps and a subwoofer. The custom made enclosures for this truck are amazing — they tuck out of the way, and some come preloaded with some of the best subs on the market. Make sure you feed them enough power to really let them achieve their full potential.

Safety, sound and performance: Head unit, speakers, amps and subs — your truck sounds great, now make it more functional. Add a Bluetooth interface for hands-free calling and music streaming. Or mount a rear-view camera on your Silverado, then connect it to your in-dash DVD receiver so you can get a clear view when you're backing up.

Last updated October 29, 2015
  • Glen from Lewistown, Pa

    Posted on 5/6/2015 5:11:53 PM

    Well over a year ago I already replaced the head unit while letting the BOSE sub and amp hooked up. I also have 12" Sub tucked away under the back seat but I'm still thankful for this write-up! It gives a nice visual of what's behind the A-pillar and behind the door panels along with specific sizes and options so it makes my job a lot easier for purchasing. Thanks for the detailed write-up Crutchfield!

  • jeremy from Greer sc

    Posted on 6/21/2015 7:19:30 AM

    Trying to find a touch screen radio that will fit my 2004 chevy 1500 regular cab 4x4

  • Jon Paulette from Crutchfield

    Posted on 6/23/2015 9:21:54 AM

    Jeremy, we sent your question to our sales team for the best answer. They'll be contacting you via email soon. For immediate help, you can contact them via phone or chat.

  • samuel turner from little rock. ar

    Posted on 7/6/2015 3:17:45 PM

    How do I unlock a locked gmt800 factory radio in a 03 Silverado

  • Jon Paulette from Crutchfield

    Posted on 7/7/2015 9:56:51 AM

    Samuel, Your local Chevy dealer could probably handle that, but if you want to save a few bucks and do it yourself, there is help available. We found several informative how-tos in Chevy truck owners' forums, so check those out first.

  • James Edward Gravlee II from Missoula

    Posted on 7/22/2015 12:49:22 AM

    I just bought a 2006 Silverado 1500 crew cab and I love the truck. I was wondering if you could send me a copy of this article I know that I should be able to copy it or something but I suckered with computers so I would really appreciate it. Besides with out the help of the Crutchfield Team the end result of my project would be a waste of time and money. Where as with your help my truck will do nothing but impress and the Huge Crutchfield sticker I intend to put on it will let everybody know where to go to get the best. The best part will be seeing all though people who just knew that they knew More than the number one athority in car audio. THE CRUTCHFIELD TEEM

  • Jon Paulette from Crutchfield

    Posted on 7/22/2015 2:24:33 PM

    James, Thanks for the kind words! We can't really send the article out, exactly, but the good news is that it'll be here online whenever you need it. Also, the same basic stereo removal info is available in the Crutchfield MasterSheet that's available for $10 by itself or included free with your gear purchase.

  • Doug from Douglas ga

    Posted on 7/30/2015 7:33:13 PM

    I need 4 new speaker for my 2007 Chevrolet Silverado any ideal as to the cost for all 4?

  • Jon Paulette from Crutchfield

    Posted on 7/31/2015 9:54:52 AM

    Doug, That all depends on the kind of speakers you want to buy! Our sales team can help you find exactly what you need, so I'll forward your question to them. They'll be contacting you via email soon. For immediate help, you can contact them via phone or chat.

  • Nick from grapevine

    Posted on 8/10/2015 8:56:43 PM

    my truck was recently totaled and I have all the bose speakers out even the amp, but where and how do I remove the sub roofer? If you could just tell me where it is located it would be greatly appreciated. THank you!!!!

  • Jon Paulette from Crutchfield

    Posted on 8/11/2015 9:55:05 AM

    Nick, Ouch. Sorry to hear about that. The Bose powered subwoofer is mounted in the center console, which you'll need to remove. It's not an easy job, but it's do-able.

  • Paul from Shelbyville, KY

    Posted on 8/25/2015 6:27:23 PM

    I have a 2005 Sierra with the Bose system and factory radio. It does not have a subwoofer built in so I have been trying to hook up a separate amplifier and sub to it.. With little success. I hooked up the sub to the rear speaker wires (I spliced them underneath the door panel trim) and the sub barely plays any music, and plays no bass if it is even playing anything at all. Do you have any ideas as to why it is not working or suggestions on how to fix?? Thank you.

  • Jon Paulette from Crutchfield

    Posted on 8/26/2015 1:18:10 PM

    Paul, From what you've described, it sounds like the sub isn't getting enough juice from the existing connection. If you bought your gear from Crutchfield, you can call Tech Support for free help troubleshooting your system. If you purchased your equipment elsewhere, you can still get expert Crutchfield Tech Support - 90 days-worth for only $30. Check out our tech support page for details.

  • Rick Carman from Rome

    Posted on 9/2/2015 11:23:17 PM

    I have a variety of problems with my 2004 Silverado Bose sound system. 2 speakers work, 3 sound weak or blown, 1 is dead. How can I isolate the problem? Head unit, amp, or speakers? Is it possible to bypass/eliminate the Bose amp? Will I have to rewire and/or replace all of the speakers?

  • Jon Paulette from Crutchfield

    Posted on 9/3/2015 8:58:13 AM

    Rick, It's probably the speakers, but it's hard to say from here. The good news is that replacing them isn't that difficult, and you won't have to rewire. Crutchfield includes a mounting bracket (if needed) and speaker wiring harnesses with every speaker order. I've sent this along to our sales team, and they'll be contacting you via email soon. For immediate help, you can contact them via phone or chat.

  • robert fair from pine hill nj

    Posted on 9/25/2015 10:52:31 PM

    Hi I'm a past crutchfield customer i have a 2003 chevy silveraldo with the factory base radio cd player no bose no onstar can i by pass the chimes feature and wire up the after market radio with just the radio harness. Minus the chimes feature thanks rob

  • Jon Paulette from Crutchfield

    Posted on 9/28/2015 8:58:20 AM

    Robert, The warning chimes, which are built into the factory radio, are an important safety feature in your truck. In order to retain those chimes when you install an aftermarket radio, you must use a factory integration adapter recommended by Crutchfield. Crutchfield cannot offer technical support for an installation undertaken without this adapter.

  • Jennifer Davis from Clayton

    Posted on 10/15/2015 11:28:59 PM

    when putting an aftermarket stereo into a 2005 chevy silverado 1500, does the new stereo have to be programmed at the dealership with the trucks VIN number?

  • Jon Paulette from Crutchfield

    Posted on 10/16/2015 10:25:49 AM

    Jennifer, If you were swapping out one OEM radio for another, you would need to see the dealer, but when you install an aftermarket radio, you won't. The new wiring harness adapter (included at a healthy discount with your Crutchfield stereo purchase, BTW) will communicate with your truck and get the info it needs to generate warning chimes and retain other factory features.

  • JOSE from lebanon

    Posted on 10/27/2015 11:52:09 AM


  • Jon Paulette from Crutchfield

    Posted on 10/27/2015 1:04:03 PM

    Jose, You can use our vehicle selector to confirm which stereos fit your truck and get some info on what else is needed for the installation. if you need more info, just give us a call!

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