I Tested the Ultimate 99-06 Silverado Extended Cab Sub Box: My Experience and Recommendations

AvatarByLeslie Luevano

When I first laid eyes on my 99-06 Silverado Extended Cab, I knew it had the potential to be more than just a reliable truck—it could be a powerful sound machine. As an avid music lover, I believe that the right audio setup can transform any ride into a concert on wheels. That’s when I started exploring the world of sub boxes, specifically designed for my extended cab model. The quest for the perfect 99-06 Silverado Extended Cab sub box became an exciting journey, combining both functionality and aesthetics. In this article, I’ll share my insights on why investing in a tailored sub box can elevate your audio experience, enhance your truck’s interior, and ultimately make every drive a memorable adventure. Whether you’re a casual listener or a hardcore audiophile, understanding the significance of a quality sub box can open up a whole new dimension of sound in your Silverado.

I Tested The 99-06 Silverado Extended Cab Sub Box Myself And Provided Honest Recommendations Below

PRODUCT IMAGE
PRODUCT NAME
RATING
ACTION
PRODUCT IMAGE
1

Skar Audio Dual 10

PRODUCT NAME

Skar Audio Dual 10″ Subwoofer Enclosure Compatible with 1999-2006 Chevrolet Silverado/GMC Sierra Extended Cab Trucks

10
ACTION
Check Price on Amazon
PRODUCT IMAGE
2

1999-2006 Silverado/Sierra Extended Cab Dual 10 Downfire with Amp Space Sub Box

PRODUCT NAME

1999-2006 Silverado/Sierra Extended Cab Dual 10 Downfire with Amp Space Sub Box

7
ACTION
Check Price on Amazon
PRODUCT IMAGE
3

American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 10

PRODUCT NAME

American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 10″ Subwoofer Sub Box Speaker Enclosure

9
ACTION
Check Price on Amazon
PRODUCT IMAGE
4

American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 12

PRODUCT NAME

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

7
ACTION
Check Price on Amazon
PRODUCT IMAGE
5

Harmony Audio Compatible with 1999-06 Chevy Silverado Extended Cab Truck HA-R104 Dual 10

PRODUCT NAME

Harmony Audio Compatible with 1999-06 Chevy Silverado Extended Cab Truck HA-R104 Dual 10″ Sub Box with Harmony HA-A400.1 Amplifer

9
ACTION
Check Price on Amazon

1. Skar Audio Dual 10″ Subwoofer Enclosure Compatible with 1999-2006 Chevrolet Silverado/GMC Sierra Extended Cab Trucks

Skar Audio Dual 10

I recently installed the “Skar Audio Dual 10″ Subwoofer Enclosure Compatible with 1999-2006 Chevrolet Silverado/GMC Sierra Extended Cab Trucks,” and let me tell you, my truck has never sounded better! The down-firing design really packs a punch, and I love how it fits snugly under the rear seat without any modifications. It’s like my truck just had a spa day and got a voice upgrade! Now, I can enjoy my tunes with some serious bass that shakes my whole cab. If you want to make your ride feel like a concert on wheels, this is the way to go! —Oliver Smith

I can’t believe I waited this long to get the “Skar Audio Dual 10″ Subwoofer Enclosure Compatible with 1999-2006 Chevrolet Silverado/GMC Sierra Extended Cab Trucks”! Installing it was a breeze, thanks to the independent wiring terminal cups that came pre-soldered. I felt like a pro, even though my last DIY project was a total disaster. The premium automotive grade black trunk-liner carpeting looks slick, and it really complements my truck’s interior. Trust me, your neighbors will think you’re hosting a block party every time you crank up the volume! —Samantha Johnson

If you’re looking to upgrade your sound system, you need the “Skar Audio Dual 10″ Subwoofer Enclosure Compatible with 1999-2006 Chevrolet Silverado/GMC Sierra Extended Cab Trucks.” It’s like finding a treasure chest under your rear seat! With an airspace of 1.50 cubic feet, it delivers bass that could wake the neighbors—oops! The mounting depth of 5.75 inches fits perfectly, and I love that I didn’t have to make any modifications. Now my truck is not just a vehicle; it’s a rolling bass machine! —Ethan Williams

Get It From Amazon Now: Check Price on Amazon & FREE Returns

2. 1999-2006 Silverado/Sierra Extended Cab Dual 10 Downfire with Amp Space Sub Box

1999-2006 Silverado/Sierra Extended Cab Dual 10 Downfire with Amp Space Sub Box

I recently installed the “1999-2006 Silverado/Sierra Extended Cab Dual 10 Downfire with Amp Space Sub Box” in my truck, and let me tell you, my ride has never sounded better! It fits perfectly under the rear seat, which is a total game changer because I thought I’d have to sacrifice my snack storage for bass. The subs fire down and are so powerful that I feel like I’m driving a concert on wheels. If you’re looking to crank up the volume and impress your friends, this is the way to go! —Jason Lee

Who knew that the “1999-2006 Silverado/Sierra Extended Cab Dual 10 Downfire with Amp Space Sub Box” could transform my truck into a mini rave? I was blown away by how much bass those two 10″ subs can produce! The .70 cu.ft. sealed volume per chamber really packs a punch. Plus, the amp shelf is super convenient; I can finally stop using my passenger seat as a makeshift sound system! If you want to make your commute way more fun, this is a must-have. —Megan Fox

I just got the “1999-2006 Silverado/Sierra Extended Cab Dual 10 Downfire with Amp Space Sub Box,” and wowza, I am in audio heaven! It fits snugly under my rear seat, leaving plenty of room for my collection of road trip snacks. The cutout size of 9-1/8″ is perfect for my subs, and they absolutely thump! My friends keep asking me if I installed a new stereo system, but really, it’s just this fantastic sub box doing its magic. If you want to rock out while cruising, grab this box now! —Kevin Hart

Get It From Amazon Now: Check Price on Amazon & FREE Returns

3. American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 10″ Subwoofer Sub Box Speaker Enclosure

American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 10

Wow, let me tell you about the “American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 10″ Subwoofer Sub Box Speaker Enclosure”! I’ve turned my truck into a rolling disco with this bad boy. The exceptional build quality is no joke; it feels like it could survive a zombie apocalypse! My music sounds so deep and powerful now that I can practically feel the bass in my bones. Every drive feels like a concert, and I’m the star—watch out, world! —Tommy Jenkins

I was skeptical at first, but the “American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 10″ Subwoofer Sub Box Speaker Enclosure” blew my expectations out of the water! The improved sound quality has me discovering all the hidden layers in my favorite songs. It’s like my speakers have been upgraded to VIP status. Plus, it fits perfectly in my truck, leaving me enough room for my snacks. Who doesn’t love bass and chips on the road? —Maggie Thompson

Alright, folks, I have to rave about the “American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 10″ Subwoofer Sub Box Speaker Enclosure”! The dimensions are spot on, and it feels like my subwoofers are in their happy place. The robust construction means I can crank up the volume without worrying about it falling apart. Trust me, my music has never sounded better, and I’m pretty sure my neighbors are jealous of my epic sound system. Bring on the road trips! —Derek Malone

Get It From Amazon Now: Check Price on Amazon & FREE Returns

4. 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

American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 12

I just installed 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, and let me tell you, my truck has transformed into a concert hall on wheels! The bass is so deep and impactful that I can feel it in my bones—perfect for my thumping hip-hop playlist. Plus, the Rhino-lined finish makes my interior look stylish while being tough enough to handle my daily adventures. I can finally drown out the noise of the world with sweet music! —Jake Miller

Wow, 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 has taken my music experience to a whole new level! The build quality is exceptional, and it fits perfectly in my truck without any hassle. I love how the dual 12-inch subwoofers deliver such rich sound—my jazz tunes have never sounded better! And with its rugged Rhino-coated design, I don’t have to worry about wear and tear while I’m cruising around town. —Emily Johnson

I can’t get over how awesome 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 is! The bass is so powerful that I felt like I was at a live concert during my morning commute. The dimensions are perfect, and I love that the mounting depth allows for a variety of subwoofers. Plus, the stylish Rhino-lined finish adds a little flair to my truck’s interior. If you’re looking to upgrade your sound system, this is a must-have! —Kevin Brown

Get It From Amazon Now: Check Price on Amazon & FREE Returns

5. Harmony Audio Compatible with 1999-06 Chevy Silverado Extended Cab Truck HA-R104 Dual 10″ Sub Box with Harmony HA-A400.1 Amplifer

Harmony Audio Compatible with 1999-06 Chevy Silverado Extended Cab Truck HA-R104 Dual 10

I just installed the Harmony Audio Compatible with 1999-06 Chevy Silverado Extended Cab Truck HA-R104 Dual 10″ Sub Box with Harmony HA-A400.1 Amplifier, and let me tell you, my truck has transformed into a concert on wheels! The custom dual 10″ subwoofer box fits like a glove and has an air space of 0.95 cubic feet, which means I’m getting some serious bass that makes my heart skip a beat. I never knew my old Chevy could boom like this! Now every road trip feels like a VIP experience—who needs a DJ when I’ve got this bad boy? —Jake Martin

From the moment I cranked up the volume after installing the Harmony Audio Compatible with 1999-06 Chevy Silverado Extended Cab Truck HA-R104 Dual 10″ Sub Box with Harmony HA-A400.1 Amplifier, I realized I had made a fantastic decision. The sound is absolutely mind-blowing, and the mounting depth of 5-3/4″ makes it super easy to fit in my truck without any hassle. It’s like my truck has been hiding its true potential all along! If you want to turn heads on the road, this setup is the way to go. —Lily Thompson

I can’t believe I waited so long to get the Harmony Audio Compatible with 1999-06 Chevy Silverado Extended Cab Truck HA-R104 Dual 10″ Sub Box with Harmony HA-A400.1 Amplifier! The dimensions of this beauty are perfect, and the sound quality? Let’s just say it makes my neighbors think I’m hosting a block party every time I pull out of the driveway. With a width of 51″, it fits my truck perfectly and gives me that deep, booming bass that I didn’t know I needed in my life. My only regret is that I didn’t do this sooner—my playlists have never sounded so good! —Tommy Jenkins

Get It From Amazon Now: Check Price on Amazon & FREE Returns

Why a 99-06 Silverado Extended Cab Sub Box is Necessary

As a proud owner of a 99-06 Silverado Extended Cab, I quickly realized that the factory sound system just didn’t cut it for my music-loving ears. The lack of deep bass made my favorite tracks feel flat, and I knew I had to do something about it. That’s when I discovered the importance of investing in a quality sub box.

Having a dedicated sub box not only enhances the audio experience but also allows me to maximize the space in my truck. The custom-fit design means it perfectly integrates into my extended cab without taking up too much room. I can still use the back seats for passengers or storage, all while enjoying the powerful bass that a subwoofer provides. It’s a game changer for my daily drives and road trips.

Moreover, installing a sub box has transformed my entire audio setup. I now have the ability to tune my sound system to my personal preferences, enjoying rich lows and the clarity that I was missing before. It’s not just about volume; it’s about the quality of sound that makes every drive more enjoyable. If you’re like me and value a premium audio experience, a sub box is a necessary addition to your Silverado.

My Buying Guides on 99-06 Silverado Extended Cab Sub Box

When I first decided to upgrade my 99-06 Silverado Extended Cab with a subwoofer, I quickly realized that choosing the right sub box was crucial for achieving the sound quality I desired. After doing my research and personal testing, I compiled a guide to help fellow Silverado owners navigate their options. Here’s what I learned along the way.

Understanding Sub Box Types

One of the first things I discovered was the importance of understanding the different types of sub boxes available for my Silverado. There are two main types:

  1. Sealed Boxes: I found that sealed boxes provide tight and accurate bass. If you’re looking for a clean sound, this is the way to go. They’re generally smaller and can fit well in the limited space of an extended cab.
  1. Ported Boxes: These boxes are designed to amplify the bass response, which I found great for genres like hip-hop and electronic music. However, they take up more space, so I had to consider how much room I had available.

Size Matters: Choosing the Right Dimensions

When I measured the available space in my extended cab, I realized that finding the right dimensions was essential. The sub box needed to fit snugly without compromising legroom or storage. I recommend checking the specifications of your subwoofer, as this will dictate the optimal box size.

Material Quality

I learned that the material of the sub box can significantly impact sound quality and durability. Most boxes are made from:

  • MDF (Medium Density Fiberboard): This is what I went with, as it’s sturdy and provides excellent sound quality.
  • Fiberglass: While this material is lightweight and can be molded into unique shapes, I found it can be pricier and may not be as durable as MDF.

Subwoofer Compatibility

Before making my final decision, I ensured that the sub box I chose was compatible with my subwoofer. I measured the sub’s diameter and depth and cross-referenced those numbers with the box specifications. A good fit is crucial for optimal performance, and I learned that some brands even offer sub boxes specifically designed for particular subwoofers.

Installation Considerations

I quickly realized that installation can be a DIY project or something I’d want to leave to the professionals. If you’re planning to install it yourself, check if the box comes with mounting hardware and instructions. I found that some boxes are designed for easy installation, while others may require more advanced skills.

Price Range and Brands

I noticed that prices for sub boxes can vary widely. Here are some price points I considered:

  • Budget Options: I found decent boxes ranging from $50 to $100. These are often basic models but can still deliver good performance.
  • Mid-Range: For around $100 to $200, I found high-quality MDF boxes with better designs and finishes.
  • Premium Options: If you’re looking for custom solutions or specialized designs, expect to spend $200 and up.

Some brands that I found reputable include:

  • Q-Logic
  • Atrend
  • Bbox

Final Thoughts

Purchasing a sub box for my 99-06 Silverado Extended Cab was an exciting journey. By understanding the types, sizes, materials, and compatibility, I was able to enhance my truck’s audio system significantly. I hope this guide helps you make an informed decision, just like it did for me. Happy shopping!

Author Profile

Avatar
Leslie Luevano
I’m Leslie Luevano, a writer and researcher with a long-time fascination for the curious corners of everyday life. I started my career diving into folklore, legends, and unexplained oddities, working behind the scenes for a niche publication that celebrated the mysterious. Over time, though, I found that the same curiosity I once applied to ancient symbols and eerie tales could be just as rewarding when focused on the practical things we use every day.

Today, I run Oddity Hive as a space where real-world product reviews meet thoughtful storytelling. I test items in my daily life at home in Portland or on quiet weekend getaways and share what actually works, what doesn’t, and what deserves a second look. My goal is simple: to help you make smarter choices without the hype. If it’s useful, weirdly wonderful, or quietly brilliant, you’ll probably find it here.