99-06 (2007 Classic) Silverado Extended Cab Single Sub Box

99-06 (2007 Classic) Silverado Extended Cab Single Sub Box

Xtreme EnclosuresCustom Built: Estimated lead time of 20-40 Business days.
SKU: CHEVY GM EC 99-06 SINGLE In Stock
Regular price$258.70

A single 99-06 Silverado extended cab sub box that also fits the 2007 Classic (old body style) extended cab. It mounts under the rear seat with the sub firing down, and takes one 8", 10" or 12" subwoofer.

Fits

  • Chevrolet Silverado extended cab, 99-06
  • 2007 extended cab in the old Classic body style only; check whether your 2007 is the old or new body, and call before ordering if unsure
  • Mounts under the rear seat
  • The floor mats may need to come out

Specs

Subwoofers One 8", 10" or 12"
Firing direction Down
Airspace 0.7 cu ft with an 8" or 10" sub; 0.9 cu ft with a 12" sub
Mounting depth 7" for 8" and 10" subs; 6.75" for 12" subs
Cutouts Standard: 7" for 8" subs, 9 1/8" for 10" subs, 11 1/8" for 12" subs
Construction MDF
Terminals Speaker terminal included

Install notes

  • You may need to remove the floor mats for the box to sit properly under the rear seat.

Choosing your subs

Check your sub against the depth and airspace for its size: 7" and 0.7 cu ft for 8s and 10s, 6.75" and 0.9 cu ft for 12s. Compare its cutout with the standard hole, and type the sub model in the "What Sub Model are you using?" box when ordering so the hole is cut to match. Shop 8" subwoofers, 10" subwoofers or 12" subwoofers.

Built to order

Built to order by Xtreme Enclosures in carpeted MDF. Estimated lead time: 20–40 business days.

Questions before you order? Call SSA at (443) 345-1537 or email support@soundsolutionsaudio.com.

Sale Ends November 19th, 2026
Minimum Purchase of $349.00
*Applies to Mechman, SSA Limitless Lithium & XS Power Products ONLY
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A single 99-06 Silverado extended cab sub box that also fits the 2007 Classic (old body style) extended cab. It mounts under the rear seat with the sub firing down, and takes one 8", 10" or 12" subwoofer.

Fits

  • Chevrolet Silverado extended cab, 99-06
  • 2007 extended cab in the old Classic body style only; check whether your 2007 is the old or new body, and call before ordering if unsure
  • Mounts under the rear seat
  • The floor mats may need to come out

Specs

Subwoofers One 8", 10" or 12"
Firing direction Down
Airspace 0.7 cu ft with an 8" or 10" sub; 0.9 cu ft with a 12" sub
Mounting depth 7" for 8" and 10" subs; 6.75" for 12" subs
Cutouts Standard: 7" for 8" subs, 9 1/8" for 10" subs, 11 1/8" for 12" subs
Construction MDF
Terminals Speaker terminal included

Install notes

  • You may need to remove the floor mats for the box to sit properly under the rear seat.

Choosing your subs

Check your sub against the depth and airspace for its size: 7" and 0.7 cu ft for 8s and 10s, 6.75" and 0.9 cu ft for 12s. Compare its cutout with the standard hole, and type the sub model in the "What Sub Model are you using?" box when ordering so the hole is cut to match. Shop 8" subwoofers, 10" subwoofers or 12" subwoofers.

Built to order

Built to order by Xtreme Enclosures in carpeted MDF. Estimated lead time: 20–40 business days.

Questions before you order? Call SSA at (443) 345-1537 or email support@soundsolutionsaudio.com.

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We accept payments with :
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Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

We accept payments with :
Visa, MasterCard, American Express, Paypal, Diners Club, Discover and more.

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