2007-2013 Chevrolet / GMC Silverado 1500 / Sierra 1500 Subwoofer Box Fitment

2007-2013 Chevrolet / GMC Silverado 1500 / Sierra 1500 GMT900 (new body, not the 2007 Classic) — subwoofer box fitment

What we researched for this specific generation: where an enclosure actually fits, what the factory speakers are, how the factory audio is wired, and which real builds and commercial products exist for it. Confidence badges say how well each figure is sourced — this is research, not manufacturer spec.

Body styles covered: Regular Cab, Extended/Double Cab, Crew Cab

Where a box actually fits

These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.

Crew Cab Likely

Location	underseat storage compartment, crew cab
Outer bounding box	54"W x 13"D x 6.5"H (rear) tapering up to 9.5"H (front) — sourced from a storage-drawer product explicitly spanning 2007-2018, matching this page's range. Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: NET Audio '2007-2013 Chevy Silverado Crew Cab Sub Box Double Sealed': 50.5 x 16 x 8.5 in (as printed; axes not labelled), 1.76 ft3, under rear seat; NET Audio '2007-2013 Chevy Silverado Crew Cab Sub Box Double Up Fire Sealed': 50.5 x 17.25 x 7.5 in (as printed; axes not labelled), 1.6 ft3, under rear seat; SRQ Customs 'Chevrolet Silverado 2007-2014 4 8" Subwoofer Enclosure': 54 x 18 x 12 in (as printed; axes not labelled), under rear seats (needs a 2.5 in seat lift sold separately); Kicker 'Chevy/GMC-Specific Dual 12" L7T 2-Ohm Enclosure': 52" W x 7-7/16" H x 15-1/2" D (Kicker's labels; the box is formed to the cab contours), under the back seat [only 2008-2013]. Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: Ground Shaker 'BLACK 10" SINGLE SEALED SUB BOX, FITS 01-17 CHEVY SILVERADO CREW-CAB': Height 6 1/2", Length 30 1/2", Depth 12 1/2" (labelled by Ground Shaker), 0.68 FT^3, FITS UNDER REAR SEAT; Ground Shaker 'BLACK 8" DUAL SEALED SUB BOX, FITS 07-13 CHEVY SILVERADO CREW-CAB': Front Height 7 1/2", Rear Height 4 3/4", Length 52 1/2", Depth 18" (labelled by Ground Shaker), 1.76 FT3 total; 0.88 FT3 per subwoofer, FITS UNDER REAR SEAT.
Known obstructions	None specifically documented beyond the front-to-rear height taper already in the bounding box
Usable volume estimate	3 ft³

Starting points

Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.

Budget

Subwoofers	1x10" or 1x12" ported, 1.25 ft3
Box type	ported
Location	under/behind rear seat

Enthusiast

Subwoofers	2x10" or 2x12" (per Stealthbox/other Crew Cab commercial products)
Box type	sealed
Location	under rear seat

Door speaker fitment

Sizes and depths below are what research turned up for this generation. Confirm against your own vehicle before cutting or ordering — trim levels vary.

Front doors Solid

Factory speaker size	closest aftermarket equivalent is 6-3/4"
Known obstructions	Factory speaker is not truly 6-3/4" — an adapter plate is needed for any aftermarket speaker
Adapter bracket needed	yes

Rear doors Solid

Factory speaker size	closest aftermarket equivalent is 6-3/4" (Crew Cab and Extended/Double Cab both)
Known obstructions	Adapter plate needed, same as front
Adapter bracket needed	yes

Factory audio integration

Factory amp / premium audio	Confirmed on this generation, trim gating partial. 6-CD in-dash Bose system available on top-tier trims — GMC Sierra Denali (continuing this page's predecessor generation's standard-Bose finding) and select top-of-line Silverado trims (LTZ-level). Exact Silverado trim name/year boundary within 2007-2013 not fully pinned down.
Adding subs without a head-unit swap	Confirmed straightforward — multiple commercial direct-fit products exist
Head unit	No replacement needed

Known integration products

JL Audio Stealthbox (shared Crew Cab 1500 + 2500/3500 part)

Mounting locations

Crew Cab Likely

under rear seat

Commercial data, though year-range labeling is inconsistent across sellers: one product lists 'GMC Sierra 2007-2014' Crew Cab compatibility while listing 'Chevy Silverado 2014-2018' separately — possibly reflecting a real one-year badge-engineering offset between the two brands, or just imprecise marketing copy. Treat as needing verification, not fact. A JL Audio Stealthbox covers Crew Cab 1500 AND 2500/3500 Crew Cab as one shared part. The 2007 Silverado / Sierra Classic — the previous (GMT800) body, sold alongside this one for 2007 — is the 1999-2006 page, not this one; Zenclosures' 2007-2013 under-seat box "excludes 2007 Classic".

Extended Double Cab Solid

under/behind rear seat

Specific spec found for this body style: single ported 10" or 12", 1.25 ft3, mounting depth 5.75" (10") or 5.5" (12")

Builds and products found for this vehicle

Outside links. Some are commercial products, some are owner builds posted on forums — the label says which. We do not endorse any of them.

Garmin/JL Audio (sealed) off-the-shelf
Stealthbox SB-GM-SLVCC4/12TW3/BK — one part covering Silverado/Sierra 1500 Crew Cab AND 2500/3500 Crew Cab
CustomLowz (unspecified) off-the-shelf
Underseat enclosure listed as fitting a wide 2007.5-2018 Crew Cab range — another cross-generation continuity signal, similar to what was seen on the Ford F-150
Commercial listing (1 x 12", ported) off-the-shelf
Single ported 10" or 12", 1.25 ft3, 5.75"/5.5" mounting depth
NET Audio (sealed) off-the-shelf
2007-2013 Chevy Silverado Crew Cab Sub Box Double Sealed. NET Audio states fit years 2007-2013 (Crew Cab). Published outside dimensions: 50.5 x 16 x 8.5 in (as printed; NET Audio does not label the axes). Published volume: 1.76 ft3. Mounting depth 4.5 (no bump) in. Type: sealed. Location: under rear seat.
NET Audio (sealed) off-the-shelf
2007-2013 Chevy Silverado Crew Cab Sub Box Double Up Fire Sealed. NET Audio states fit years 2007-2013 (Crew Cab). Published outside dimensions: 50.5 x 17.25 x 7.5 in (as printed; NET Audio does not label the axes). Published volume: 1.6 ft3. Mounting depth 5 in. Type: sealed upfire. Location: under rear seat.
NET Audio (sealed) off-the-shelf
2007-2013 Chevy Silverado Crew Cab Sub Box Single Sealed. NET Audio states fit years 2007-2013 (Crew Cab). Published outside dimensions: 30 x 16 x 8.5 in (as printed; NET Audio does not label the axes). Published volume: 0.9 ft3. Mounting depth 4.5-5.875 in. Type: sealed. Location: under rear seat.

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SRQ Customs (4 x 8", ported) off-the-shelf
Chevrolet Silverado 2007-2014 4 8" Subwoofer Enclosure. SRQ Customs states fit years 2007-2014 (Crew Cab). Published outside dimensions: 54 x 18 x 12 in (as printed; SRQ Customs does not label the axes). Type: ported, tuned to 34 Hz. Location: under rear seats (needs a 2.5 in seat lift sold separately).
Kicker (2 x 12", loaded, down-firing (sealed/ported not stated by Kicker)) off-the-shelf
Chevy/GMC-specific dual 12" L7T 2-ohm loaded down-firing enclosure, installs under the back seat. Kicker publishes 52"W x 7-7/16"H x 15-1/2"D and lists Silverado/Sierra 1500 LD Crew Cab 2008-2026 (HD Crew Cab 2008-2027), so of the 2007-2013 model years here it covers 2008-2013, not 2007. Kicker publishes these as the box outside dimensions (W/H/D as printed; it does not say which axis D is) and the box is formed to the cab contours, so W x H x D bounds a contoured shape, not a rectangular block — a lower bound on the cavity, not the cavity.
NET Audio (sealed) off-the-shelf
2007-2013 Chevy Silverado Extended Cab Sub Box Double Sealed. NET Audio states fit years 2007-2013 (Extended Cab). Published outside dimensions: 54.75 x 12.875 x 10.25 in (as printed; NET Audio does not label the axes). Published volume: 1.2 ft3. Mounting depth 5.5 (10s, double bump) in. Type: sealed. Location: under seat.
NET Audio (sealed) off-the-shelf
2007-2013 Chevy Silverado Extended Cab Sub Box Single Sealed. NET Audio states fit years 2007-2013 (Extended Cab). Published outside dimensions: 34 x 12.875 x 10.25 in (as printed; NET Audio does not label the axes). Published volume: 0.8 ft3. Mounting depth 5.5 (10s, double bump) in. Type: sealed. Location: under seat.
NET Audio (sealed) off-the-shelf
2007-2013 Chevy Silverado Standard Cab Sub Box Full Single Sealed. NET Audio states fit years 2007-2013 (Standard Cab). Published outside dimensions: 34 x 19.5 x 9 in (as printed; NET Audio does not label the axes). Published volume: 1.23 ft3. Mounting depth 6.25 in. Type: sealed. Location: behind seat (passenger side).
NET Audio (sealed) off-the-shelf
2007-2013 Chevy Silverado Standard Cab Sub Box Single Sealed. NET Audio states fit years 2007-2013 (Standard Cab). Published outside dimensions: 21 x 9 x 15.5 in (as printed; NET Audio does not label the axes). Published volume: 0.95 ft3. Mounting depth 6.25 in. Type: sealed. Location: behind seat.
NET Audio (ported) off-the-shelf
2007-2013 Chevy Silverado Standard Cab Sub Box Full Tall Ported. NET Audio states fit years 2007-2013 (Standard Cab). Published outside dimensions: 54.5 x 9 x 22.5 in (as printed; NET Audio does not label the axes). Published volume: 1.5 ft3. Mounting depth 6.25 in. Type: ported. Location: behind seat (passenger's seat).
Zenclosures (sealed) off-the-shelf
Chevy Silverado & GMC Sierra Crew Cab 2007-2013 Dual Subwoofer Box (UTS). Zenclosures states fit years 2007-2013 (Crew Cab). No outside dimensions on the product page. Published volume: approx 0.85 ft3 per sub/side. Mounting depth 5.00 (8-10 in); 4.50 (12 in) in. Type: sealed. Location: under rear seat, down firing.
Skar Audio (2 x 12", ported) off-the-shelf
Dual 12" 2,000W Loaded Subwoofer Enclosure Compatible with 2007-2013 Chevrolet Silverado/GMC Sierra Crew Cab Trucks (L-VS-2X12GM-2007-2013-CREWCAB-V). Skar Audio states fit years 2007-2013 (Crew Cab). Outside dimensions: not recorded here — check Skar's product page. Type: ported. Location: beneath the rear seat, OEM-style fit. Skar's fit list also names 2500HD/3500HD crew cabs 2007-2014.
Ground Shaker (ported) off-the-shelf
BLACK 8" DUAL PORTED SUB BOX, FITS 07-13 CHEVY SILVERADO CREW-CAB (SKU GS-TCHVP28B). Ground Shaker states fit years 07-13 for Chevy Silverado Crew-Cab. Published outside dimensions: Front Height 7 1/2", Rear Height 4 3/4", Length 52 1/2", Depth 18" (labelled by Ground Shaker). Published volume: 1.70 FT3 total; 0.85 FT3 per subwoofer. Mounting depth 5 1/4". Type: ported. Location: FITS UNDER REAR SEAT; DOWN FIRING. Maker notes: 2007 FITS ONLY THE NEW BODY STYLE; SUBWOOFERS WITH WIDE BASKETS / MAGNETS MAY NOT FIT. The same outside dimensions, volume and mounting depth are printed for these related listings: 10" dual [GS-TCHVP210B]; 12" dual [GS-TCHVP212B]; 12" dual [GS-TGMP212B]; 8" dual [GS-TGMP28B]; 10" dual [GS-TGMP210B].
Ground Shaker (2 x 8", ported) off-the-shelf
BLACK 8" DUAL PORTED SUB BOX, FITS 07-18 CHEVY SILVERADO EXTENDED CAB (SKU GS-JCHVP28B). Ground Shaker states fit years 07-18 for Chevy Silverado Extended Cab. Published outside dimensions: Front Height 10 3/4", Rear Height 7 1/4", Length 55 1/2", Depth 13 1/2" (labelled by Ground Shaker). Published volume: 1.25 FT³. Mounting depth 6 1/2". Type: ported. Location: FITS UNDER REAR SEAT; DOWN FIRING. Maker notes: 2007 FITS ONLY THE NEW BODY STYLE.
Ground Shaker (2 x 8", ported) off-the-shelf
BLACK 8" DUAL PORTED SUB BOX, FITS 07-26 CHEVY SILVERADO REGULAR-CAB (SKU GS-CSTCCXLP28B). Ground Shaker states fit years 07-26 for Chevy Silverado Regular-Cab. Published outside dimensions: Height 15", Length 49", Top Depth 6", Bottom Depth 10 1/2" (labelled by Ground Shaker). Published volume: 1.70 FT3. Mounting depth 10 1/2". Type: ported. Location: Fits Behind Seat; Forward Firing. The same outside dimensions, volume and mounting depth are printed for these related listings: 8" dual [GS-GSTCCXLP28B].
Ground Shaker (sealed) off-the-shelf
BLACK 8" DUAL SEALED SUB BOX, FITS 07-13 CHEVY SILVERADO CREW-CAB (SKU GS-TCHV28B). Ground Shaker states fit years 07-13 for Chevy Silverado Crew-Cab. Published outside dimensions: Front Height 7 1/2", Rear Height 4 3/4", Length 52 1/2", Depth 18" (labelled by Ground Shaker). Published volume: 1.76 FT3 total; 0.88 FT3 per subwoofer. Mounting depth 5 1/4". Type: sealed. Location: FITS UNDER REAR SEAT; DOWN FIRING. Maker notes: 2007 FITS ONLY THE NEW BODY STYLE; SUBWOOFERS WITH WIDE BASKETS / MAGNETS MAY NOT FIT. The same outside dimensions, volume and mounting depth are printed for these related listings: 10" dual [GS-TCHV210B]; 12" dual [GS-TCHV212B]; 8" dual [GS-TCHVKK28B]; 10" dual [GS-TGM210B]; 8" dual [GS-TGMKK28B]; 8" dual [GS-TGM28B]; 12" dual [GS-TGM212B].
Ground Shaker (sealed) off-the-shelf
BLACK 8" DUAL SEALED SUB BOX, FITS 07-13 CHEVY SILVERADO CREW-CAB (SKU GS-RCHV28B). Ground Shaker states fit years 07-13 for Chevy Silverado Crew-Cab. Published outside dimensions: Height 7 1/4", Length 49 1/4", Depth 14 3/4" (labelled by Ground Shaker). Published volume: 1.30 FT^3 total; 0.65 FT^3 per subwoofer. Mounting depth 5 1/2". Type: sealed. Location: FITS UNDER REAR SEAT; UPWARD FIRING. Maker notes: 2007 FITS ONLY THE NEW BODY ESTYLE. The same outside dimensions, volume and mounting depth are printed for these related listings: 10" dual [GS-RCHV210B]; 12" dual [GS-RCHV212B].
Ground Shaker (sealed) off-the-shelf
BLACK 8" DUAL SEALED SUB BOX, FITS 07-18 CHEVY SILVERADO EXTENDED CAB (SKU GS-JCHV28B). Ground Shaker states fit years 07-18 for Chevy Silverado Extended Cab. Published outside dimensions: Front Height 9 1/4", Rear Height 7 1/4", Length 55 1/2", Depth 13 1/2" (labelled by Ground Shaker). Published volume: 1.26 FT^3 total; 0.63 FT^3 per subwoofer. Mounting depth 6 1/2". Type: sealed. Location: FITS UNDER REAR SEAT BEHIND THE DRIVER'S SIDE; DOWN FIRING. Maker notes: WILL NOT FIT 2007 CLASSIC. The same outside dimensions, volume and mounting depth are printed for these related listings: 10" dual [GS-JCHV210B]; 12" dual [GS-JCHV212B]; 8" dual [GS-JCHVKK28B] (SoloBaric variant); 10" dual [GS-JCHVL7T210B] (L7T variant); 8" dual [GS-JGM28B]; 12" dual [GS-JGM212B]; 8" dual [GS-JGMKK28B] (SoloBaric variant); 10" dual [GS-JGM210B]; 10" dual [GS-JGML7T210B] (L7T variant).
Ground Shaker (sealed) off-the-shelf
BLACK 8" DUAL SEALED SUB BOX, FITS 07-26 CHEVY SILVERADO REGULAR-CAB (SKU GS-STCC28B). Ground Shaker states fit years 07-26 for Chevy Silverado Regular-Cab. Published outside dimensions: Height 13 3/4", Length 53 1/4", Top Depth 5", Bottom Depth 9" (labelled by Ground Shaker). Published volume: 1.50 FT^3 total; 0.75 FT^3 per subwoofer. Mounting depth 6 3/4". Type: sealed. Location: FITS BEHIND SEAT; FORWARD FIRING. Maker notes: NO NEED TO REMOVE CENTER CONSOLE DURING INSTALLATION; SUBWOOFERS WITH WIDE BASKETS/MAGNETS MAY NOT FIT. The same outside dimensions, volume and mounting depth are printed for these related listings: 10" dual [GS-STCCKK210B]; 8" dual [GS-GSTCC28B]; 10" dual [GS-GSTCC210B]; 12" dual [GS-GSTCC212B]; 8" dual [GS-GSTCCKK28B]; 10" dual [GS-GSTCCKK210B]; 12" dual [GS-GSTCCKK212B]; 10" dual [GS-STCC210B]; 12" dual [GS-STCC212B]; 8" dual [GS-STCCKK28B]; 12" dual [GS-STCCKK212B].
Ground Shaker (sealed) off-the-shelf
BLACK 8" SINGLE SEALED SUB BOX, FITS 07-13 CHEVY SILVERADO & CREW-CAB (SKU GS-RCHV18B). Ground Shaker states fit years 07-13 for Chevy Silverado & Crew-Cab. Published outside dimensions: Height 7 1/4", Length 32 1/4", Depth 14 3/4" (labelled by Ground Shaker). Published volume: 0.85 FT^3. Mounting depth 5 1/2". Type: sealed. Location: FITS UNDER REAR SEAT; UPWARD FIRING. Maker notes: 2007 FITS ONLY THE NEW BODY ESTYLE. The same outside dimensions, volume and mounting depth are printed for these related listings: 10" single [GS-RCHV110B]; 12" single [GS-RCHV112B]; 8" single [GS-RCHVKK18B] (SoloBaric variant); 10" single [GS-RCHVL7T110B] (L7T variant); 12" single [GS-RCHVL7T112B] (L7T variant); 10" single [GS-RGM110B]; 12" single [GS-RGM112B]; 8" single [GS-RGMKK18B] (SoloBaric variant); 10" single [GS-RGML7T110B] (SoloBaric variant); 8" single [GS-RGM18B]; 12" single [GS-RGML7T112B] (SoloBaric variant).
Ground Shaker (sealed) off-the-shelf
BLACK 8" SINGLE SEALED SUB BOX, FITS 07-18 CHEVY SILVERADO EXTENDED CAB (SKU GS-JCHV18B). Ground Shaker states fit years 07-18 for Chevy Silverado Extended Cab. Published outside dimensions: Front Height 9 1/2", Rear Height 7 1/2", Length 29 1/2", Depth 13 1/2" (labelled by Ground Shaker). Published volume: 0.68 FT^3. Mounting depth 6". Type: sealed. Location: FITS UNDER REAR SEAT BEHIND THE DRIVER'S SIDE; DOWN FIRING. Maker notes: WILL NOT FIT 2007 CLASSIC. The same outside dimensions, volume and mounting depth are printed for these related listings: 10" single [GS-JCHV110B]; 8" single [GS-JGM18B]; 10" single [GS-JGM110B]; 12" single [GS-JGM112B]; 12" single [GS-JCHV112B].
Ground Shaker (ported) off-the-shelf
BLACK 10" DUAL PORTED SUB BOX, FITS 07-18 CHEVY SILVERADO EXTENDED CAB (SKU GS-JCHVP210B). Ground Shaker states fit years 07-18 for Chevy Silverado Extended Cab. Published outside dimensions: Front Height 9 1/4", Rear Height 7 1/4", Length 55 1/2", Depth 13 1/2" (labelled by Ground Shaker). Published volume: 1.25 FT^3. Mounting depth 6 1/2". Type: ported. Location: FITS UNDER REAR SEAT BEHIND THE DRIVER'S SIDE; DOWN FIRING. Maker notes: WILL NOT FIT 2007 CLASSIC. The same outside dimensions, volume and mounting depth are printed for these related listings: 12" dual [GS-JCHVP212B]; 8" dual [GS-JGMP28B]; 10" dual [GS-JGMP210B]; 12" dual [GS-JGMP212B].
Ground Shaker (1 x 10", sealed) off-the-shelf
BLACK 10" SINGLE SEALED L7T SUB BOX, FITS 07-18 CHEVY SILVERADO EXTENDED CAB (SKU GS-JCHVL7T110B). Ground Shaker states fit years 07-18 for Chevy Silverado Extended Cab. Published outside dimensions: Front Height 9 1/2", Rear Height 7 1/2", Length 29 1/2", Depth 13 1/2" (labelled by Ground Shaker). Published volume: 0.63 FT^3. Mounting depth 4". Type: sealed. Location: FITS UNDER REAR SEAT BEHIND THE DRIVER'S SIDE; DOWN FIRING. Maker notes: WILL NOT FIT 2007 CLASSIC. The same outside dimensions, volume and mounting depth are printed for these related listings: 10" single [GS-JGML7T110B] (L7T variant).
Ground Shaker (1 x 10", sealed) off-the-shelf
BLACK 10" SINGLE SEALED SUB BOX, FITS 01-17 CHEVY SILVERADO CREW-CAB (SKU GS-QCHV110B). Ground Shaker states fit years 01-17 for Chevy Silverado Crew-Cab. Published outside dimensions: Height 6 1/2", Length 30 1/2", Depth 12 1/2" (labelled by Ground Shaker). Published volume: 0.68 FT^3. Mounting depth 5 1/2". Type: sealed. Location: FITS UNDER REAR SEAT; UPWARD FIRING. Maker notes: REQUIRES REMOVAL OF BOLTS PLASTIC COVERS; 2007 FITS ONLY THE OLD BODY ESTYLE.
Ground Shaker (sealed) off-the-shelf
BLACK 13.5" DUAL JL TW5 SEALED SUB BOX, FITS 07-13 CHEVY SILVERADO CREW-CAB (SKU GS-TCHVTW5213B). Ground Shaker states fit years 07-13 for Chevy Silverado Crew-Cab. Published outside dimensions: Front Height 7 1/2", Rear Height 4 3/4", Length 52 1/2", Depth 18" (labelled by Ground Shaker). Published volume: 1.60 FT3 total; 0.80 FT3 per subwoofer. Mounting depth 4 1/2". Type: sealed. Location: FITS UNDER REAR SEAT; DOWN FIRING. Maker notes: FOR JL AUDIO TW5 SUBWOOFERS ONLY; 2007 FITS ONLY THE NEW BODY STYLE. The same outside dimensions, volume and mounting depth are printed for these related listings: 10" dual [GS-TCHVL7T210B] (L7T variant); 12" dual [GS-TCHVL7T212B] (L7T variant); 10" dual [GS-TCHVTW3210B] (TW3 variant); 12" dual [GS-TCHVTW3212B] (TW3 variant); 10" dual [GS-TGMTW3210B] (TW3 variant); 12" dual [GS-TGMTW3212B] (TW3 variant); 13" dual [GS-TGMTW5213B]; 10" dual [GS-TGML7T210B] (L7T variant); 12" dual [GS-TGML7T212B] (L7T variant).
Ground Shaker (sealed) off-the-shelf
BLACK 13" DUAL SEALED TW5 SUB BOX, FITS 07-26 CHEVY SILVERADO REGULAR-CAB (SKU GS-STCCTW5213B). Ground Shaker states fit years 07-26 for Chevy Silverado Regular-Cab. Published outside dimensions: Height 13 3/4", Length 53 1/4", Top Depth 5", Bottom Depth 9" (labelled by Ground Shaker). Published volume: 1.42 FT^3 total; 0.71 FT^3 per subwoofer. Mounting depth 6 3/4". Type: sealed. Location: FITS BEHIND SEAT; FORWARD FIRING. Maker notes: no center console removal needed; FOR TW5 SUBWOOFERS ONLY. The same outside dimensions, volume and mounting depth are printed for these related listings: 10" dual [GS-STCCTW3210B] (TW3 variant); 12" dual [GS-STCCTW3212B] (TW3 variant); 12" dual [GS-GSTCCTW3212B] (TW3 variant); 13" dual [GS-GSTCCTW5213B]; 10" dual [GS-GSTCCTW3210B] (TW3 variant).
Sound Off Audio (4 x 6.5", ported) off-the-shelf
2007-13 SILVERADO EXTENDED CAB QUAD 6.5" PORTED SUBWOOFER BOX (SKU GMEC07-6.4V). Sound Off Audio states fit years 2007-2013 for Chevrolet Silverado Extended Cab. No outside dimensions on the product page. Published volume: 0.75 cubic feet per side. Type: Ported. Subwoofers: Four 6.5-inch.
Sound Off Audio (2 x 8", ported) off-the-shelf
2007-13 Silverado/Sierra Crew Ultra Deep Dual 8" ported (SKU GMCREW078.2VDEEP). Sound Off Audio states fit years 2007-2013 for Silverado/Sierra Crew. No outside dimensions on the product page. Type: Ported. Subwoofers: Dual 8". Location: Crew cab (rear).
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
2007-2013 Chevrolet Silverado Extended Cab Single Sub Box (SKU ChevyEC 07-13 Single). Sound Off Audio states fit years 2007-2013 for Chevrolet Silverado Extended Cab; GMC Sierra Extended Cab. No outside dimensions on the product page. Published volume: 0.6 cubic ft per sub. Mounting depth 8 inch sub: 6 inches; 10 inch sub: 6 inches; 12 inch sub: 5 5/8 inches. Subwoofers: Single subwoofer (8, 10, or 12 inch). Location: Subwoofer fires down.
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
2007-2013 Chevy Silverado Extended Cab Dual Sub Box (SKU CHEVYEC 07-13 DUAL). Sound Off Audio states fit years 2007-2013 for Chevrolet Silverado and GM Sierra Extended Cab. No outside dimensions on the product page. Published volume: 0.6 cubic ft per sub. Mounting depth 8 inch sub = 6 inches; 10 inch sub = 6 inches; 12 inch sub = 5 5/8 inches. Subwoofers: Dual 8, 10, or 12 inch subwoofers. Location: Subwoofers fire down. Sound Off Audio also lists the same box as: 'DUAL SUB BOX 2007-2013 GM SIERRA EXTENDED CAB' (GMEC07-13 DUAL).
Sound Off Audio (sealed) off-the-shelf
DEEP Sub box- 2007-2013 Chevy Silverado/GM Sierra Crew Dual Box (SKU GMCRW07 DUAL DEEP). Sound Off Audio states fit years 2007-2013 (it also says it fits select 2014 HD models) for Chevrolet Silverado Crew Cab / GMC Sierra Crew Cab. No outside dimensions on the product page. Published volume: 1.1 cu ft per chamber (0.8 cu ft per chamber with amp rack option). Mounting depth 7.5 inches for 10-inch subs; 7 inches for 12-inch subs (7-inch magnet). Type: Sealed. Subwoofers: Dual 8, dual 10, dual 12 or single 12. Location: Under rear seat.
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
Dual Sub Box 2007 to 2013 Chevy Silverado / GM Sierra Standard (Regular) Cab (SKU CHEVYSTD 07 DUAL). Sound Off Audio states fit years 2007-2013 for Chevy Silverado / GM Sierra Standard (Regular) Cab. No outside dimensions on the product page. Mounting depth 6 1/2 inches. Subwoofers: Dual 8, dual 10, dual 12, triple 8, or triple 10. Location: Behind seat.
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
Dual Sub Box 2007-2013 GM SIERRA CREW (SKU GMCREW 07 DUAL). Sound Off Audio states fit years 2007-2013 (not compatible with the 2014 1500 crew cab) for Chevy Silverado Crew Cab and GMC Sierra Crew Cab (new body style). No outside dimensions on the product page. Published volume: 0.85 cu ft per chamber. Mounting depth 5 5/8 inches (10" subs); 5 inches (12" subs). Subwoofers: Dual 8, dual 10, or dual 12. Location: Under-seat (subwoofers fire down).
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
DUAL Sub Box w/AMP RACK 2007-2013 GM SIERRA CREW (SKU GMCRW 07 DUAL AMP RACK). Sound Off Audio states fit years 2007-2013 in its title and 2007-2014 in its fit sentence, for Chevrolet Silverado Crew Cab and GMC Sierra Crew Cab. No outside dimensions on the product page. Published volume: 0.65 cubic ft per chamber. Mounting depth 6.5 inches. Subwoofers: Dual 8, 10, or 12 inch subwoofers. Location: Under seats.
Sound Off Audio (2 x 8", ported) off-the-shelf
PORTED DUAL 8 BOX- 2007-2013 CHEVY SILVERADO CREW (SKU PORT GMCRW07 8.2). Sound Off Audio states fit years 2007-2013 (not the 2014 1/2 ton) for Chevrolet Silverado Crew and GMC Sierra Crew. No outside dimensions on the product page. Published volume: 1.5 cubic ft (total). Mounting depth 6 inches. Type: Ported. Subwoofers: Dual 8 inch. Location: Driver side or passenger side (selectable). Sound Off Audio also lists the same box as: 'PORTED DUAL 8 BOX- 2007-2014 GMC SIERRA CREW CAB' (PORT GMCRW07 DUAL 8).
Sound Off Audio (4 x 8", ported) off-the-shelf
PORTED QUAD 8 for 2007-2013 Chevy Silverado Crew (SKU PORT GMCRW07 8.4). Sound Off Audio states fit years 2007-2013 for Chevy Silverado Crew Cab. No outside dimensions on the product page. Published volume: 2.4 cubic ft mono chamber (total). Mounting depth Up to 6 inches. Type: Ported; vent adjustable. Subwoofers: Four 8 inch. Sound Off Audio also lists the same box as: 'PORTED QUAD 8 for 2007-2013 GMC SIERRA Crew' (GMCRW07 8.4 PORTED).
Sound Off Audio (2 x 8", ported) off-the-shelf
Ported Sub box 07-13 GMC Sierra/Chevy Silverado Extended Cab (SKU CHEVY GM 07-13 DUAL PORTED). Sound Off Audio states fit years 2007-2013 for GMC Sierra and Chevy Silverado Extended Cab. No outside dimensions on the product page. Published volume: 1.4 cubic feet mono chamber. Type: Ported. Subwoofers: Dual 8-inch.
Sound Off Audio (ported) off-the-shelf
Ported Sub Box 2007-2013 Chevrolet Silverado Crew Cab Dual Sub (SKU Ported GM CREW 07-13 Dual). Sound Off Audio states fit years 2007-2013 in its title and "New Body Style 2007 to 2014" in its fit sentence, for Chevrolet Silverado Crew Cab / GMC Sierra Crew. No outside dimensions on the product page. Published volume: 2.2 Mono Chamber. Mounting depth 6 inches. Type: Ported. Subwoofers: Dual 8 and dual 10 inch subwoofer box. Location: Fits under the rear seat. Sound Off Audio also lists the same box as: 'PORTED Dual Sub box 2007-2013 GM SIERRA CREW DUAL SUB BOX' (GMCRW 07 DUAL PORTED).
Super Crew Sound (other (sealed/ported not stated by the maker)) off-the-shelf
Chevy Silverado / GMC Sierra Crew Cab 2007-2013 Dual Deep Subwoofer Box with seat lift kit (SKU 07ChevyCCdualdeepwithlift). Super Crew Sound states fit years 2007-2013 for Chevy Silverado / GMC Sierra Crew Cab. No outside dimensions on the product page. Mounting depth 6 5/8" (8" & 10") (Optional 7 1/4"); 6 3/8" (12") (Optional 7"). Subwoofers: Fits two 8, 10 or 12 inch subwoofers. Location: Fits under rear seat; Subs fire down. Maker notes: Does not fit 2007 Classic. Hole cutouts 8" 7", 10" 9 1/8", 12" 11". 1 1/2" clearance under the box. Includes Seat Lift Kit which raises your back seats 2". Box divider included.
Super Crew Sound (other (sealed/ported not stated by the maker)) off-the-shelf
Chevy Silverado / GMC Sierra Crew Cab 2007-2013 Single Subwoofer Box (SKU 07ChevyCCsingle). Super Crew Sound states fit years 2007-2013 for Chevy Silverado / GMC Sierra Crew Cab. No outside dimensions on the product page. Published volume: .85 cubic foot. Mounting depth 5" (8" & 10"); 4.5" (12"); optional 5 5/8" and 5 1/8". Subwoofers: Fits one 8, 10, or 12 inch subwoofer. Location: Fits under rear seat; Sub fires down. Maker notes: Does not fit 2007 Classic. Hole cutouts 8" 7", 10" 9 1/8", 12" 11". MDF.
Super Crew Sound (2 x 8", ported) off-the-shelf
Chevy Silverado / GMC Sierra Extended Cab 07-13 Ported Dual Subwoofer Box (SKU 07ChevyECporteddual). Super Crew Sound states fit years 2007-2013 for Chevy Silverado / GMC Sierra Extended Cab. No outside dimensions on the product page. Published volume: 1.4 cu ft mono Chamber. Type: Ported. Subwoofers: Fits two 8 inch subwoofers. Location: Fits under rear seat; Subs fire Forward. Maker notes: Does not fit 2007 Classic. Tuned to 38Hz. Hole cutout for 8" sub 7". MDF.
Super Crew Sound (other (sealed/ported not stated by the maker)) off-the-shelf
Chevy Silverado / GMC Sierra Extended Cab 2007-2013 Dual Subwoofer Box (SKU 07ChevyECdual). Super Crew Sound states fit years 2007-2013 for Chevy Silverado / GMC Sierra Extended Cab. No outside dimensions on the product page. Published volume: 0.60 cubic foot per sub. Mounting depth 5" (Optional 5 5/8"); 12" Sub: 4 3/8" (optional 5"). Subwoofers: Fits 8, 10 or 12 inch subwoofers. Location: Under rear seat; Subs fire down. Maker notes: Does not fit 2007 Classic. 1 1/2" under the box clearance. Hole cutouts 8" 7", 10" 9 1/8", 12" 11". MDF.
Super Crew Sound (other (sealed/ported not stated by the maker)) off-the-shelf
Chevy Silverado / GMC Sierra Extended Cab 2007-2013 Single Subwoofer Box (SKU 07ChevyECsingle). Super Crew Sound states fit years 2007-2013 for Chevy Silverado / GMC Sierra Extended Cab. No outside dimensions on the product page. Published volume: 0.60 cubic foot. Mounting depth 5" (Optional 5 5/8"); for 12" Sub: 4 3/8" (Optional 5"). Subwoofers: Fits 8, 10 or 12 inch subwoofer. Location: Fits under rear seat; Sub fire down. Maker notes: Does not fit 2007 Classic. 1 1/2" clearance under the box. Hole cutouts 8" 7", 10" 9 1/8", 12" 11". Charcoal Grey Carpet. MDF.

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Design a box for this vehicle — Enclosure volume, port tuning, and a see-through render.
Door speaker fitment — No measured door depth on file for this vehicle yet, so there is no fit check to run. The page says how to request one.
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Measure your own vehicle. Trim levels, factory subwoofer options, and mid-generation changes all move these numbers, and a box cut to a researched figure that does not match your truck is wasted wood. Where a badge reads Unconfirmed, treat the value as a starting point for your own measurement, not as an answer.