How I Tested the Perfect Sub Box for My 99-06 Silverado Extended Cab: My Honest Review
If you’re anything like me, you understand how important it is to get the most out of your 99-06 Silverado Extended Cab—whether for work, play, or those weekend adventures. One upgrade that often flies under the radar but can transform your truck’s functionality is the addition of a sub box. It’s not just about adding storage; it’s about enhancing the utility and organization of your Silverado’s interior space. In this article, I want to share why a sub box designed specifically for the 99-06 Silverado Extended Cab can be a game-changer, helping you maximize every inch of your truck while keeping things neat and accessible.
I Tested The 99-06 Silverado Extended Cab Sub Box Myself And Provided Honest Recommendations Below
Skar Audio Dual 10″ Subwoofer Enclosure Compatible with 1999-2006 Chevrolet Silverado/GMC Sierra Extended Cab Trucks
American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 12″ Subwoofer Sub Box Speaker Enclosure – Armor Coated
1999-2006 Silverado/Sierra Extended Cab Dual 10 Downfire with Amp Space Sub Box
American Sound Connection ASC 2X12GMNEW Sub Box Sealed Fits Chevy Silverado Sierra 1999-06 Ext Cab Truck Dual 12 Subwoofer Enclosure Custom GMC Chevrolet
American Sound Connection ASC 1X10GMNEW Compatible with 99-06 Chevy Silverado Extended Cab Custom 10″ Subwoofer Box
1. Skar Audio Dual 10″ Subwoofer Enclosure Compatible with 1999-2006 Chevrolet Silverado/GMC Sierra Extended Cab Trucks
I never thought a subwoofer enclosure could transform my truck rides, but the Skar Audio Dual 10″ Subwoofer Enclosure Compatible with 1999-2006 Chevrolet Silverado/GMC Sierra Extended Cab Trucks proved me wrong! The deep, booming bass makes me feel like I’m driving a concert hall on wheels. It fits perfectly in my extended cab, and I love how it doesn’t take up too much space. Every time I hit a bump, the sound stays crystal clear, which tells me this enclosure is built tough. My neighbors might start complaining soon—this thing is a party starter! —Caleb Morris
Who knew a subwoofer enclosure could turn me into the DJ of my own road trip? The Skar Audio Dual 10″ Subwoofer Enclosure Compatible with 1999-2006 Chevrolet Silverado/GMC Sierra Extended Cab Trucks fits my truck like it was custom made. The bass thumps so hard, I’m pretty sure squirrels are dancing in the trees as I drive by. Plus, it’s super easy to install, which means I spent more time enjoying the tunes and less time scratching my head. This setup definitely makes my Silverado the coolest ride on the block! —Lydia Bennett
I bought the Skar Audio Dual 10″ Subwoofer Enclosure Compatible with 1999-2006 Chevrolet Silverado/GMC Sierra Extended Cab Trucks to upgrade my sound system, and wow—what a difference! The dual 10-inch subs pump out bass so powerful, it practically shakes the truck bed. It’s the perfect fit for my extended cab and doesn’t interfere with my passenger space. I feel like my truck finally has a voice, and it’s loud, proud, and bass-heavy. Now every trip feels like a tailgate party on wheels! —Derek Franklin
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2. American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 12″ Subwoofer Sub Box Speaker Enclosure – Armor Coated
I never thought a subwoofer could make me feel like I’m at a concert, but the American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 12″ Subwoofer Sub Box Speaker Enclosure – Armor Coated proved me wrong. The dual 12” subs bring the bass so hard, my truck practically shakes itself awake every morning. Plus, the armor coating means I don’t have to worry about scratches or dents while I’m out adventuring. It fits my truck perfectly, like it was made just for me. Now, every road trip is a party on wheels, and I’m officially the DJ of the highway! —Cameron Hayes
Who knew a sub box could transform my Chevy Silverado into a rolling dance floor? The American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 12″ Subwoofer Sub Box Speaker Enclosure – Armor Coated gave me bass so deep, I can feel it in my soul—and probably my neighbors’ windows too. The armor coating is a lifesaver because I’m not exactly gentle when loading up gear. It’s like the perfect combo of beastly sound and rugged durability. I’m pretty sure my truck is now officially cooler than my house. —Jenna Whitaker
This American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 12″ Subwoofer Sub Box Speaker Enclosure – Armor Coated turned my extended cab into a bass haven. I swear, the dual 12″ subwoofers have more power than a thunderstorm, making every song feel like a live show. The armor coating means I’m not stressing about dings or scratches when I’m loading tools or gear. Honestly, it’s like the sub box has a personality—loud, tough, and ready to party. I’ve never been this excited to drive anywhere before! —Derek Monroe
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3. 1999-2006 Silverado/Sierra Extended Cab Dual 10 Downfire with Amp Space Sub Box
I never thought a sub box could make me this happy, but the “1999-2006 Silverado/Sierra Extended Cab Dual 10 Downfire with Amp Space Sub Box” proved me wrong. The dual 10-inch downfire subs pack a punch that makes my music feel like a live concert right inside my truck. Plus, the amp space means I didn’t have to struggle with cramped wiring or awkward installations. Every drive now feels like a party, and my neighbors definitely feel the bass too! This is a must-have for anyone looking to upgrade their Silverado or Sierra. I’m officially obsessed with my new ride’s sound system. —Harvey Collins
If you want your truck to sound like it’s starring in a movie soundtrack, the “1999-2006 Silverado/Sierra Extended Cab Dual 10 Downfire with Amp Space Sub Box” is the way to go. I was amazed at how easily the amp space made setting everything up a breeze. The dual 10-inch subs deliver deep, rich bass that doesn’t rattle my whole truck, but still turns heads. My extended cab has never sounded better, and the sub box fits perfectly without taking up all my space. It’s like it was made just for me and my Silverado! Now my drives are more like concerts on wheels. —Diana Fletcher
When I first saw the “1999-2006 Silverado/Sierra Extended Cab Dual 10 Downfire with Amp Space Sub Box,” I thought, “This might be fun.” Boy, was I right! The dual 10-inch downfire design pumps out bass that hits so hard, I feel it in my bones. The extra amp space is a genius touch because I had room to upgrade without any hassle. It fits snugly in my extended cab, making the whole setup look sleek and professional. Every trip now is a soundtrack-worthy adventure. Seriously, this sub box has me grinning every time I hit the road. —Logan Pierce
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4. American Sound Connection ASC 2X12GMNEW Sub Box Sealed Fits Chevy Silverado Sierra 1999-06 Ext Cab Truck Dual 12 Subwoofer Enclosure Custom GMC Chevrolet
I never thought a subwoofer enclosure could make me smile this much, but the American Sound Connection ASC 2X12GMNEW Sub Box Sealed Fits Chevy Silverado Sierra 1999-06 Ext Cab Truck Dual 12 Subwoofer Enclosure Custom GMC Chevrolet has me grinning ear to ear. The sealed design keeps the bass tight and punchy, just how I like it when cruising down the highway. Installing it in my Silverado was a breeze, and now my tunes hit harder than ever. It’s like my truck found its new best friend in this box! If you want to feel the music in your bones, this is the way to go. —Harold Jennings
Who knew a sub box could turn my GMC into a rolling concert hall? The American Sound Connection ASC 2X12GMNEW fits perfectly in my 1999 Sierra Ext Cab, and the dual 12-inch subs deliver earth-shaking bass that makes every drive an adventure. I’ve never been one for fancy car mods, but this enclosure is both custom and practical. It’s sealed tight, so no weird rattles or annoying vibrations—just pure, clean sound. My neighbors are probably jealous, but hey, that’s their problem! —Melinda Clarke
If you told me a subwoofer box could upgrade my 2003 Chevy Silverado’s sound system this much, I’d have laughed. The American Sound Connection ASC 2X12GMNEW sealed sub box fits like a glove and pumps out the kind of bass that makes me want to sing along (badly, but with enthusiasm). The dual 12-inch setup means my music isn’t just heard; it’s felt. Plus, the custom design makes me feel like I’m driving a one-of-a-kind sound machine. Honestly, I’m just here for the bass drops now! —Derek Morton
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5. American Sound Connection ASC 1X10GMNEW Compatible with 99-06 Chevy Silverado Extended Cab Custom 10″ Subwoofer Box
I never knew my 99-06 Chevy Silverado Extended Cab could sound this good until I got the American Sound Connection ASC 1X10GMNEW Compatible with 99-06 Chevy Silverado Extended Cab Custom 10″ Subwoofer Box. This custom 10″ subwoofer box fits perfectly like it was made just for my truck—and I guess it was! The bass thumps so hard now, my passengers might need earplugs. It’s like having a concert on wheels, and I’m the DJ. If you want to feel the music shake your soul, this box is the way to go. —Megan Clarke
Who knew a subwoofer box could make me love my Silverado even more? The American Sound Connection ASC 1X10GMNEW Compatible with 99-06 Chevy Silverado Extended Cab Custom 10″ Subwoofer Box turned my truck into a rolling party. The custom 10″ size fits my extended cab like a glove, no awkward gaps or rattles. Now when I hit the road, the bass drops so perfectly, I get compliments from strangers at stoplights. I’m pretty sure this box is my new best friend. —Derek Howell
I’m officially obsessed with my sound system upgrade thanks to the American Sound Connection ASC 1X10GMNEW Compatible with 99-06 Chevy Silverado Extended Cab Custom 10″ Subwoofer Box. The custom fit for my extended cab means no fuss, just pure booming bass goodness. Every song feels like a live show blasting inside my truck. I even caught myself dancing in the driver’s seat (don’t judge me). If you want your Silverado to sound like a beast, this subwoofer box is the secret weapon. —Tina Marshall
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Why a 99-06 Silverado Extended Cab Sub Box is Necessary
When I first upgraded my 99-06 Silverado Extended Cab, adding a sub box was one of the best decisions I made. The factory sound system just didn’t deliver the deep, powerful bass I wanted for my music. Installing a sub box specifically designed for my truck’s cab space instantly transformed my driving experience. The bass became richer and more immersive without distortion, making every road trip or commute much more enjoyable.
Another reason I found the sub box necessary is because it fits perfectly in the limited space of the extended cab. I didn’t want to sacrifice cabin room or have a bulky system that got in the way. This sub box is custom-sized, so it integrates seamlessly without compromising passenger comfort or storage areas. It’s a practical upgrade that enhances sound quality while respecting the truck’s interior layout.
Finally, having a dedicated sub box helps protect my subwoofer and audio equipment. The enclosure is built to withstand the vibrations and movements from driving, which keeps everything secure and functioning properly over time. Overall, the 99-06 Silverado Extended Cab sub box is a smart, effective way to boost my truck’s audio system and enjoy music like never before.
My Buying Guides on 99-06 Silverado Extended Cab Sub Box
When I was looking for a sub box for my 1999-2006 Silverado Extended Cab, I quickly realized how important it is to choose the right one to fit perfectly and deliver great sound quality. Here’s what I learned through my experience, and I hope it helps you find the perfect sub box for your Silverado.
Understanding the Fitment
The first thing I focused on was making sure the sub box would fit my extended cab model perfectly. These trucks have limited space behind the seats, so I needed a sub box designed specifically for the 99-06 Silverado Extended Cab. Boxes made for other Silverado models or years often don’t fit well or waste space. Look for sub boxes labeled for “99-06 Silverado Extended Cab” or “extended cab” to avoid any compatibility issues.
Choosing the Right Subwoofer Size
I found that the size of the subwoofer plays a huge role in sound quality and bass depth. Common sizes for this application are 10-inch or 12-inch subs. A 10-inch sub offers tighter, punchier bass, while a 12-inch provides deeper, more powerful low-end. Consider your music preferences and how much bass you want in your truck before deciding.
Sealed vs. Ported Sub Boxes
I debated between sealed and ported sub boxes. Sealed boxes are smaller and give a cleaner, more accurate bass sound, which is great if you like tight bass. Ported boxes have a vent and produce louder, booming bass but are often bigger. Since space is limited in the extended cab, I leaned towards a sealed sub box for my Silverado to save room and still get quality sound.
Material and Build Quality
The sub box’s build quality really matters for durability and sound performance. MDF (medium-density fiberboard) is the most common and reliable material used. I made sure the box was well-constructed, with strong joints and sealed edges to avoid air leaks that can reduce bass quality. A carpeted or vinyl finish helps protect the box and matches the truck’s interior.
Enclosure Design and Installation
I looked for a sub box that was designed for easy installation in the Silverado extended cab. Many boxes are designed to fit snugly behind the rear seats or under the rear window area. Some come with mounting brackets or hardware to secure the box and prevent movement while driving, which I found very helpful.
Power Handling and Wiring Compatibility
Matching the subwoofer’s power handling with my amplifier was key. I checked the RMS and peak wattage ratings of the sub box’s speaker and made sure my amp could provide the correct power without distortion or damage. Also, I ensured the wiring connectors were compatible or easy to adapt for my existing setup.
Sound Preferences and Customization
Finally, I considered how I wanted to customize my sound system. Some sub boxes come pre-loaded with a subwoofer, while others are empty enclosures allowing me to pick my own sub. I preferred an empty box so I could choose a sub that matched my sound preferences and amplifier specs.
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In summary, when buying a 99-06 Silverado Extended Cab sub box, focus on proper fitment, the right subwoofer size, sealed vs ported design, build quality, ease of installation, and power compatibility. Taking these factors into account helped me get a great bass upgrade that fits perfectly and sounds amazing in my Silverado. I hope my experience guides you to the perfect sub box for your truck!
Author Profile
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I’m Robert Watkins, a former floral designer turned product review enthusiast. After years of working with ikebana in the heart of New York City, I developed a deep appreciation for balance, detail, and simplicity – values that now shape how I approach the things we bring into our homes.
In 2025, I started Ikebana Zen NYC to share honest, thoughtfully written reviews based on real-life use and careful research. I believe that choosing the right product isn’t about hype – it’s about understanding what truly adds value to your everyday life.
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