If you're tired of that muddy bass or just want to reclaim your floor space, installing a 99 06 silverado center console sub box is easily one of the best upgrades you can do for your truck's audio system. Let's be real for a second—the stock sound in these GMT800 trucks wasn't exactly legendary when they rolled off the lot, and twenty-plus years later, it's probably sounding pretty tired. While most guys just throw a wedge box under the back seat and call it a day, there's something way more satisfying about having your low-end coming right from the center of the cab.
Why the Center Console is the Sweet Spot
The thing about the 99-06 Silverado is that space is actually a bit of a premium, despite it being a full-sized truck. If you've got a crew cab or an extended cab, you know that putting subs under the rear seat basically kills your storage. Plus, if you have passengers, they're basically sitting on top of a vibrator every time the bass hits. It's not always the most comfortable experience for them.
By moving the subwoofer into the center console, you're utilizing "dead space." Most of us just use that cavernous middle bin to store old receipts, a handful of loose change, and maybe a stray wrench. Swapping that out for a dedicated 99 06 silverado center console sub box lets you keep your under-seat storage free for tools or gear, and it puts the sound stage right where it belongs.
When the bass is coming from the center console, it blends much better with your door speakers. You don't get that weird "bass from behind" feeling that can happen with rear-mounted setups. It feels more integrated, punchy, and honestly, just a lot more professional.
Choosing Between a Full Console or a Jump Seat Swap
Depending on how your truck was optioned, you either have the full "flow-through" center console or the 40/20/40 bench with the flip-down jump seat. This changes your approach to the sub box significantly.
If you have the full console, you're usually looking at a box that replaces the internal plastic tub. You keep the outer shell and the armrest, so it looks completely stock from the outside. This is the "stealth" route, and it's great if you live in an area where you don't want people peeking through your windows to see expensive gear.
On the other hand, if you have the jump seat, you can actually pull that middle seat out entirely and replace it with a custom-built 99 06 silverado center console sub box. This gives you way more air space to work with. You can often fit a much larger 10-inch or even a shallow 12-inch sub this way, whereas the "stealth" tub replacement usually limits you to an 8-inch or a very specific 10-inch driver.
Finding the Right Subwoofer Size
Size matters, but maybe not in the way you think. In the world of console boxes, airspace is king. You can buy the biggest, baddest 12-inch sub on the market, but if you put it in a box that's only 0.5 cubic feet, it's going to sound like garbage.
For most 99-06 Silverado console builds, an 8-inch or a 10-inch sub is the "Goldilocks" zone. Modern 8-inch subs are surprisingly beefy. If you get a high-excursion 8-inch driver and put it in a properly spec'd console box, it'll hit harder than most people expect. It'll be tight, musical, and quick.
If you're a bass-head and you absolutely need that low-end shake, you can find 10-inch shallow mount subs that work wonders in a 99 06 silverado center console sub box. Just make sure you check the mounting depth. The last thing you want is to buy a beautiful new sub only to realize the magnet is hitting the bottom of the box before the flange touches the wood.
Materials and Build Quality
If you're shopping for a pre-made box or building one yourself, don't skimp on the materials. Most cheap boxes you find online are made of thin MDF or even particle board. You want at least 5/8" or 3/4" MDF. Since the box is sitting right next to you, any air leaks or panel flex will be immediately noticeable as whistling or rattling.
- Sealing: Make sure every joint is glued and screwed.
- Internal Bracing: If it's a larger box, a little bit of internal bracing goes a long way in stopping the walls from flexing.
- Finishing: Most of these trucks have that classic Dark Charcoal or Tan interior. You can find carpet that matches almost perfectly, or if you're feeling fancy, you can wrap it in vinyl to match the seats.
Down-Firing vs. Up-Firing
This is a big debate in the truck community. A down-firing 99 06 silverado center console sub box points the speaker toward the floor. This is great for protection—you don't have to worry about dropping a soda or your keys onto the speaker cone. It also tends to use the floor of the truck to load the sound, which can result in a bit more "rumble."
Up-firing or side-firing setups look cool, especially if you have a nice-looking sub with an LED ring or a polished dust cap, but you've got to be careful. If the sub is firing directly into the bottom of your armrest, it might cause some annoying vibrations in your elbow.
The Installation Process
Installing one of these isn't rocket science, but it does take some patience. You'll usually start by unbolting the seats or the existing console. In the 99-06 models, these are typically held in by 15mm bolts.
Once the old console is out, it's the perfect time to run your wiring. Do yourself a favor and run high-quality power and signal wires. Don't run your RCA cables (the ones carrying the music) right next to your heavy power cables, or you'll end up with a high-pitched whine that follows your engine RPMs. Nobody wants that.
When you drop the new 99 06 silverado center console sub box into place, make sure it's secured tightly. You don't want a 30-pound wooden box flying around your cab if you have to slam on the brakes. Use the factory mounting points whenever possible.
Sound Deadening is Your Friend
These trucks are built like tanks, but the plastic panels in the 99-06 era are notorious for rattling. If you're putting a sub in the center console, you're putting a lot of vibration right against the dashboard and the floor hump.
Investing in a little bit of sound deadening material (like Dynamat or a similar butyl-based sheet) can make a world of difference. Stick some on the floor where the box sits and maybe a few strips inside the plastic trim of the dash. It'll make your truck feel ten years newer and much more solid.
Is It Worth the Effort?
Honestly, after doing this to a few different GMT800 trucks, I can't imagine going back to a standard setup. There's something about having the bass right there in the middle of the cabin that makes the music feel "full" in a way that rear-mounted subs just can't replicate.
Whether you're a DIY guy who wants to spend a weekend in the garage with a table saw and some wood glue, or you're looking for a drop-in solution, a 99 06 silverado center console sub box is the way to go. It preserves your interior's functionality, looks clean, and sounds incredible. Plus, you finally get to get rid of all that junk that's been sitting in your center console since 2012. It's a win-win.