There are several advantages of having a silverado ext cab sub box. Let’s take you step by step, type by type, and find the best silverado extcab sub box for you.

Our review process: Show/Hide

Our Top Picks:

Best Overall: Buy: American Sound Connection Great Box READ REVIEW

Best For Better Bass: Buy: Atrend Silverado Ext Cab Sub Box READ REVIEW

Best For Sound Quality: Buy: American Sound Connection Silverado Ext Cab Sub Box READ REVIEW

Best For Very Low Profile: Buy: Q Power Subwoofer Box READ REVIEW

Best For Easy Install: Buy: Q Power Silverado Ext Cab Sub Box READ REVIEW

Best Overall: American Sound Connection Great Box

Buy on Amazon

The American sound connection great box's material feels more premium than its price would suggest. The American sound connection boxes are then liquid nailed, nailed and completely sealed. All the custom series enclosures are made to fit precisely into your 07. This dual 12 " enclosure is designed to fit under the rear bench seat and is a down - firing model.

The box does the job, It fits like a glove and it looks great. Moreover, it is inexpensive and it is very nice. Finally, the American sound connection box is good for very good quality and it is worth the money.

Almost all customers agree that the boxes come in different sizes, although some will say 12" those could actually be 13.5"(for example) so you will end up cutting the hole bigger in the box to fit it. Also, a few also found that the box is made for extended cab only. In addition, a few say that the quality of the box is as to be expected from a mass production. its good has some flaws. To sum up, most customers agree that the box suits them best, and no one questions it.

• These fit without any issues and fit crew cabs wrong.
• Dimensions: width 55-3/4" x front height 8-3/4" x rear height 5" x depth 14-3/4".
• This sounds good and it is great for the money.
• This is great with two dual coil kicker comps.

Best For Better Bass: Atrend Silverado Ext Cab Sub Box

Buy on Amazon

Next on the list, we've got yet another box that manages to win our hearts. It's the Atrend Silverado Ext Cab Sub Box and it's widely considered as the box that has the most suitable features. The atrend silverado EXT cab sub box sounds good, has a mounting hole and it is used for speaker mounting depth. Dramatically improve the sound quality and bass response of your truck’s speaker system and listen to the music the way it is meant to be heard. The duel 10 inch subwoofer box is designed and engineered specifically to be compatible with 2003.

Above all, the atrend silveradoext cab sub box is great for better bass and it looks great.

Most customers agree that the box also has ported enclosures instead of modifying this particular box. Also, a few also found that the box is easier to close afterwards. And, they say that the box is really well made, sounds amazing, and looks good.

• This has a depth of 6.25 .. it should be fine.
• The box is not for seats that flip up towards the front seats.
• This is not screwed together, it is glued and brad nailed together.
• This sounds good, fits well and it creates great sound.

Best For Sound Quality: American Sound Connection Silverado Ext Cab Sub Box

Buy on Amazon

The American sound connection Silverado EXT cabsub box's material feels more premium than its price would suggest. The American sound connection silverado EXT cab subbox sounds awesome and it is super nice. The manufacturer says: We then wrap them with high quality carpet that matches most vehicle interiors. Also, this is a dual 12" down - firing model, Why down firing.

The boxes are then liquid nailed, nailed and completely sealed. Moreover, it is designed for deep bass and it works great. Most importantly, the American sound connection silverado EXT cabsub box is made for quick delivery, is designed for good fit and it has an install location.

Most customers found that the box fits nice under the rear seat of a 2003 chevy 1500 ext cab. Also, a few strongly agree that the box fits and is at a great price. Further, a few say that the mounting depth of this box is 5 3/4 and that sub is 5 3/4.

• The manufacturer says: our boxes are made from precision cuts of mdf.
• This sounds good, fits well and it looks great.
• This is an extended cab that should have no problems.
• This will fit but they have to be within 5 3/4.

Best For Very Low Profile: Q Power Subwoofer Box

Buy on Amazon

The Q Power Subwoofer Box's material feels more premium than its price would suggest. The q power subwoofer box is perfect and it is of great quality. Power will get your music banging. Moreover, it looks like a factory and it is very strong.

Above all, the q power subwoofer box fits well and allows for great fit, It has a good setup and has a great design.

Most customers agree that the box will, but make sure your speakers will. And, they strongly agree that the box fits well in 15-18 and fits flush under the seat. And, they strongly agree that the box is great with 10” kickers. Overall, buyers found this to be one of the best boxes for daily purposes.

• Push your sound system to the max and immerse yourself in your favorite tunes.
• Constructed out of high grade premium MDF wood.
• Feel the boom from your subwoofer with every beat.
• The box is made for a 4ohm not a 2ohm amps.

Best For Easy Install: Q Power Silverado Ext Cab Sub Box

Buy on Amazon

The Q Power Silverado Ext Cab Sub Box is suitable and reliable and fits well with your regular use. The q power silveradoext cab sub box fits well and it fits perfectly. Turn your ride into a sound machine with the help of the q-power 12" subwoofer enclosure. And, it is brand new and it fits perfectly.

Finally, the q power silverado extcab subbox is very nice and it allows for easy install.

Most customers opine that the box fits perfectly under the seat and sounds great and easy to install. And, a few also found that the box is great with two JLS and a 500/1. And, a few strongly agree that the box is perfect and sounds very good. Therefore, customers were eager to recommend it to friends and families.

• **please note: this sub box is made to fire downward**.
• Designed and built for the deepest bass.
• These make for a great buy, fit very well and they look great.
• Brand new **q-power 12"** custom gmc/chevy ext cab '99-06 subwoofer box.