2014-2018 Chevrolet Silverado 1500 Subwoofer Box Fitment

2014-2018 Chevrolet Silverado 1500 GMT K2XX — 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, 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 (2007-2018 shared this cavity per aftermarket storage-drawer sourcing)
Outer bounding box	54"W x 13"D x 6.5"H (rear) tapering up to 9.5"H (front). Possible conflict, not resolved: a published under-seat box for this cab, Kicker 51KGMDL7T122, is 52"W x 7-7/16"H x 15-1/2"D. Its 15-1/2" D is more than the 13"D above, but Kicker does not label which axis is fore-aft, so this may be orientation rather than a contradiction. Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: NET Audio '2014-18 Chevy Silverado Crew Cab Single Sealed': 32 x 17 x 9 in (as printed; axes not labelled), 0.9 ft3, under back seat; NET Audio '2014-18 Chevy Silverado Crew Cab Sub Box Sealed': 55.5 x 17 x 10 in (as printed; axes not labelled), 2 ft3, under rear seat; SRQ Customs 'Chevrolet Silverado 2014-up Crew Cab Subwoofer Enclosure': 32 x 16 x 12 in (as printed; axes not labelled), 0.7 ft3, under the back seat on the driver side; SRQ Customs '2014-2018 Silverado / Sierra Crew Cab Enclosure - Level 1': 54 x 16 x 16 in (as printed; axes not labelled), 1.6 ft3, under seat, fires upward under the seat; seat does not need to be lifted. Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: Ground Shaker 'BLACK 10" DUAL SEALED L7T SUB BOX, FITS 14-18 CHEVY SILVERAD CREW-CAB': Height 8", Length 49 1/2", Depth 16" (labelled by Ground Shaker), 1.40 FT3 total; 0.70 FT3 per subwoofer, under the rear seat (the page prints it in Spanish: SE INSTALA DEBAJO DEL ASIENTO TRASERO); Ground Shaker 'BLACK 8" DUAL PORTED SUB BOX, FITS 14-18 CHEVY SILVERADO CREW-CAB': Front Height 9 1/4", Rear Height 6 1/2", Length 49", Depth 13 1/4", Front Baffle Thickness 1" (labelled by Ground Shaker), 1.86 FT3, FITS UNDER REAR SEAT; Audio Design SCG '2014-2018 Chevy Silverado Subwoofer Box \| 1500 & 2500': 51 x 15 x 15 in (as printed; axes not labelled).
Known obstructions	None specifically documented beyond the height taper front-to-rear already captured 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" sealed
Box type	sealed
Location	under rear seat

Enthusiast

Subwoofers	2x8" ported (named option: Skar Audio vehicle-specific enclosure) or 2x10" downfire loaded (Subthump/AudioControl)
Box type	ported or sealed loaded
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	factory oval, compatible with 5.25"/6.25"/6.5" aftermarket via adapter
Known obstructions	None specifically documented
Adapter bracket needed	yes

Rear doors Solid

Factory speaker size	6-3/4" — same size for Crew Cab (full-size rear doors) and Double Cab (slightly smaller rear doors)
Known obstructions	None specifically documented
Adapter bracket needed	unconfirmed

Factory audio integration

Factory amp / premium audio	Bose 7-speaker available starting at LT trim (later model years); base trims have no factory amp
Adding subs without a head-unit swap	Standard LOC tap should work on non-Bose trims. Bose-equipped trims need a Bose-specific adapter, not a generic LOC — verify trim before recommending a part.
Head unit	No replacement needed

Known integration products

APSUB-GM61 ($379) — PAC Audio AmpPRO subwoofer interface, per PAC's own published Application Guide (pac-audio.com, harvested 2026-08-04), using PAC's CHEVROLET SILVERADO 2014-2018 row, which is the 1500 (PAC lists SILVERADO HD separately). Requires the factory BOSE system.

Mounting locations

Crew Cab Likely

under rear seat

Builder box referenced below: underseat dual 8" box, ~2 cu ft internal, tuned 32Hz. Full interior cavity dimensions not yet independently measured — box was designed around the specific sub pair, not a generic max-fit cavity spec.

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.

diymobileaudio.com forum (2 x 8", ported) forum-sourced
Underseat dual 8" subwoofer box, ~2 cu ft internal volume, tuned to 32Hz
Skar Audio (2 x 8", ported) off-the-shelf
Named, vehicle-specific dual 8" ported enclosure explicitly built for 2014-2018 Silverado/Sierra Crew Cab — a commercial-grade equivalent to the forum DIY box above, giving this generation a real named-brand option, not just a forum build.
Subthump.com / AudioControl (2 x 10", sealed, loaded) off-the-shelf
Named dual 10" downfire loaded enclosure with amp space, built for 2014-2018 Crew Cab — a larger-driver enthusiast-tier alternative to the dual-8" options above.
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). 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
2014-18 Chevy Silverado Crew Cab Single Sealed. NET Audio states fit years 2014-2018 (Crew Cab). Published outside dimensions: 32 x 17 x 9 in (as printed; NET Audio does not label the axes). Published volume: 0.9 ft3. Mounting depth 3 7/8 (10s) / 3 5/8 (12s) in. Type: sealed. Location: under back seat.
NET Audio (sealed) off-the-shelf
2014-18 Chevy Silverado Crew Cab Sub Box Sealed. NET Audio states fit years 2014-2018 (Crew Cab). Published outside dimensions: 55.5 x 17 x 10 in (as printed; NET Audio does not label the axes). Published volume: 2 ft3. Mounting depth 5 1/4 (10s) / 4 3/8 (12s) in. Type: sealed (NET Audio also lists a ported version, same outside dimensions). Location: under rear seat. NET Audio also lists the same box for the GMC Sierra Crew Cab (same dimensions).

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SRQ Customs (other (sealed/ported not stated by the maker)) off-the-shelf
Chevrolet Silverado 2014-up Crew Cab Subwoofer Enclosure. SRQ Customs states fit years 2014-up (Crew Cab). Published outside dimensions: 32 x 16 x 12 in (as printed; SRQ Customs does not label the axes). Published volume: 0.7 ft3. Type: sealed/ported not stated. Location: under the back seat on the driver side.
SRQ Customs (other (sealed/ported not stated by the maker)) off-the-shelf
2014-2018 Silverado / Sierra Crew Cab Enclosure - Level 1. SRQ Customs states fit years 2014-2018 (Crew Cab). Published outside dimensions: 54 x 16 x 16 in (as printed; SRQ Customs does not label the axes). Published volume: 1.6 ft3. Mounting depth 4.5 in. Type: sealed/ported not stated; upfiring under the seat. Location: under seat, fires upward under the seat; seat does not need to be lifted.
SRQ Customs (other (sealed/ported not stated by the maker)) off-the-shelf
GMC Sierra Denali 2014-2019 Crew Cab Subwoofer Enclosure. SRQ Customs states fit years 2014-2019 (Crew Cab). Published outside dimensions: 52 x 16 x 16 in (as printed; SRQ Customs does not label the axes). Type: not stated; subwoofers face up into the bottom of the back seat. Location: fits under the back seat.
NET Audio (sealed) off-the-shelf
2014-18 Chevy Silverado Double Cab Sub Box Dual Sealed. NET Audio states fit years 2014-2018 (Double Cab). Published outside dimensions: 58 x 16 x 8 in (as printed; NET Audio does not label the axes). Published volume: 1.38 ft3. Mounting depth 4 3/4 (10s) / 4 1/2 (12s) in. Type: sealed. Location: under back seat.
NET Audio (sealed) off-the-shelf
2014-18 Chevy Silverado Double Cab Sub Box Single Sealed. NET Audio states fit years 2014-2018 (Double Cab). Published outside dimensions: 39 x 16 x 8 in (as printed; NET Audio does not label the axes). Published volume: 0.81 ft3. Mounting depth 4 3/4 (10s) / 4 1/2 (12s) in. Type: sealed. Location: under back seat.
Skar Audio (2 x 10", sealed) off-the-shelf
Dual 10" 1,600W Loaded Subwoofer Enclosure Compatible with 2014-2018 Chevy Silverado & GMC Sierra Crew Cab Trucks (L-VD-VS-2X10GM-2014-2018-CREWCAB). Skar Audio states fit years 2014-2018 (Crew Cab). Outside dimensions: not recorded here — check Skar's product page. Type: sealed, dual chamber, down-firing. Location: under the rear seat of the crew cab. Skar's fit list also names 2500HD/3500HD crew cabs 2015-2019.
Zenclosures (sealed) off-the-shelf
Chevy Silverado & GMC Sierra Double Cab 2014-2018 Dual Subwoofer Box (UTS). Zenclosures states fit years 2014-2018 (Double Cab). No outside dimensions on the product page. Published volume: approx 0.55 ft3 per sub/side. Mounting depth 5.125 (8/10 in); 5.00 (12 in) in. Type: sealed. Location: under rear seat, down firing.
Audio Design SCG (sealed) off-the-shelf
2014-2018 Chevy Silverado Subwoofer Box | 1500 & 2500. Audio Design SCG states fit years 2014-2018 (also fits 2019 Classic body) for Chevy Silverado 1500 & 2500 and GMC Sierra Crew Cabs (full 4 doors). Published outside dimensions: 51 x 15 x 15 in (as printed; Audio Design SCG does not label the axes). Mounting depth Sub can be 5.4" deep (if no flush top panel); woofers under 4.6" deep use flush top panel. Type: Sealed. Subwoofers: Single or dual 10" or 12"; 3 x 10"; 2 x 15" with seat lift. Maker notes: Also fits 2019 Classic body (not the new body).
Audio Design SCG (sealed) off-the-shelf
2014-2019 Chevy Silverado & GMC Sierra Double Cab Subwoofer Box | 1500 & 2500. Audio Design SCG states fit years 2014-2019 (also fits 2019 Classic body) for Chevy Silverado 1500 & 2500 and GMC Sierra, Double Cab. Published outside dimensions: 15 x 15 x 20 in (as printed; Audio Design SCG does not label the axes). Mounting depth Speaker depth 5.2" maximum. Type: Sealed. Subwoofers: Single or dual 10" or 12". Maker notes: Does NOT fit new body style 2019.
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 (2 x 8", ported) off-the-shelf
BLACK 8" DUAL PORTED SUB BOX, FITS 14-18 CHEVY SILVERADO CREW-CAB (SKU GS-FGCHVP28B). Ground Shaker states fit years 14-18 for Chevy Silverado Crew-Cab. Published outside dimensions: Front Height 9 1/4", Rear Height 6 1/2", Length 49", Depth 13 1/4", Front Baffle Thickness 1" (labelled by Ground Shaker). Published volume: 1.86 FT3. Mounting depth 6 1/4". Type: ported. Location: FITS UNDER REAR SEAT; FRONT FIRING. The same outside dimensions, volume and mounting depth are printed for these related listings: 8" dual [GS-FGMCP28B].
Ground Shaker (ported) off-the-shelf
BLACK 8" DUAL PORTED SUB BOX, FITS 14-18 CHEVY SILVERADO CREW-CAB (SKU GS-GCHVP28B). Ground Shaker states fit years 14-18 for Chevy Silverado Crew-Cab. Published outside dimensions: Height 8", Length 49 1/2", Depth 16" (labelled by Ground Shaker). Published volume: 1.38 FT^3. Mounting depth 6 1/2". Type: ported. Location: FITS UNDER REAR SEAT; DOWN FIRING. The same outside dimensions, volume and mounting depth are printed for these related listings: 10" dual [GS-GCHVP210B]; 12" dual [GS-GCHVP212B]; 8" dual [GS-GMP28B]; 10" dual [GS-GMP210B]; 12" dual [GS-GMP212B].
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" DUAL SEALED SUB BOX, FITS 14-18 CHEVY SILVERADO CREW-CAB (SKU GS-GCHV28B). Ground Shaker states fit years 14-18 for Chevy Silverado Crew-Cab. Published outside dimensions: Height 8", Length 49 1/2", Depth 16" (labelled by Ground Shaker). Published volume: 1.45 CUBIC FT^3 total; 0.73 FT^3 per subwoofer. Mounting depth 6 1/2". Type: sealed. Location: FITS UNDER THE REAR SEAT; DOWN FIRING. The same outside dimensions, volume and mounting depth are printed for these related listings: 10" dual [GS-GCHV210B]; 12" dual [GS-GCHV212B]; 10" dual [GS-GM210B]; 12" dual [GS-GM212B]; 8" dual [GS-GMKK28B] (SoloBaric variant); 12" dual [GS-GML7T212B] (L7T variant); 8" dual [GS-GCHVKK28B] (SoloBaric variant); 8" dual [GS-GM28B]; 10" dual [GS-GML7T210B] (L7T 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 (sealed) off-the-shelf
BLACK 8" SINGLE SEALED SUB BOX, FITS CHEVY 14-18 SILVERADO CREW-CAB (SKU GS-GCHV18B). Ground Shaker states fit years 14-18 for Chevy Silverado Crew-Cab. Published outside dimensions: Height 8 1/2", Length 27 1/2", Depth 16 1/2" (labelled by Ground Shaker). Published volume: 0.84 FT^3. Mounting depth 6 1/2". Type: sealed. Location: FITS UNDER REAR SEAT BEHIND THE DRIVER'S SIDE; DOWN FIRING. The same outside dimensions, volume and mounting depth are printed for these related listings: 10" single [GS-GCHV110B]; 8" single [GS-GCHVKK18B] (SoloBaric variant); 8" single [GS-GM18B]; 10" single [GS-GM110B]; 12" single [GS-GM112B]; 8" single [GS-GMKK18B] (SoloBaric variant); 12" single [GS-GCHV112B].
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 (sealed) off-the-shelf
BLACK 10" DUAL SEALED L7T SUB BOX, FITS 14-18 CHEVY SILVERAD CREW-CAB (SKU GS-GCHVL7T210B). Ground Shaker states fit years 14-18 for Chevy Silverad(o) Crew-Cab (title spells SILVERAD). Published outside dimensions: Height 8", Length 49 1/2", Depth 16" (labelled by Ground Shaker). Published volume: 1.40 FT3 total; 0.70 FT3 per subwoofer. Mounting depth 4 1/2". Type: sealed. Location: under the rear seat (the page prints it in Spanish: SE INSTALA DEBAJO DEL ASIENTO TRASERO); APUNTA HACIA ABAJO. The same outside dimensions, volume and mounting depth are printed for these related listings: 12" dual [GS-GCHVL7T212B] (L7T variant).
Ground Shaker (sealed) off-the-shelf
BLACK 10" DUAL SEALED TW3 SUB BOX, FITS 14-18 CHEVY SILVERADO CREW-CAB (SKU GS-GCHVTW3210B). Ground Shaker states fit years 14-18 for Chevy Silverado Crew-Cab. Published outside dimensions: Height 8", Length 49 1/2", Depth 16" (labelled by Ground Shaker). Published volume: 1.28 FT^3 total; 0.64 FT^3 per subwoofer. Mounting depth 3 3/4". Type: sealed. Location: FITS UNDER REAR SEAT; DOWN FIRING. The same outside dimensions, volume and mounting depth are printed for these related listings: 12" dual [GS-GCHVTW3212B] (TW3 variant); 10" dual [GS-GMTW3210B] (TW3 variant); 12" dual [GS-GMTW3212B] (TW3 variant).
Ground Shaker (1 x 10", sealed) off-the-shelf
BLACK 10" L7T SINGLE SEALED SUB BOX, FITS CHEVY 14-18 SILVERADO CREW-CAB (SKU GS-GCHVL7T110B). Ground Shaker states fit years 14-18 for Chevy Silverado Crew-Cab. Published outside dimensions: Height 8 1/2", Length 27 1/2", Depth 16 1/2" (labelled by Ground Shaker). Published volume: 0.80FT³. Type: sealed. Location: FITS UNDER REAR SEAT BEHIND THE DRIVER'S SIDE; DOWN FIRING. Ground Shaker also lists a GMC Sierra L7T single on the same outside dimensions (GS-GML7T110B; 12" GS-GML7T112B), printing 0.84 ft3 and a 5" mounting depth.
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. Of the 2014-2018 model years here, it covers 2014-2017 only. 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 10" TW3 SINGLE SEALED SUB BOX, FITS 14-18 CHEVY SILVERADO CREW-CAB (SKU GS-GCHVTW3110B). Ground Shaker states fit years 14-18 for Chevy Silverado Crew-Cab. Published outside dimensions: Height 8 1/2", Length 27 1/2", Depth 16 1/2" (labelled by Ground Shaker). Published volume: 0.80FT^3. Mounting depth 4 1/2". Type: sealed. Location: FITS UNDER REAR SEAT BEHIND THE DRIVER'S SIDE; DOWN FIRING. The same outside dimensions, volume and mounting depth are printed for these related listings: 12" single [GS-GCHVTW3112B] (TW3 variant).
Ground Shaker (1 x 12", sealed) off-the-shelf
BLACK 12" SINGLE SEALED L7T SUB BOX, FITS CHEVY SILVERADO & GMC SIERRA CREW-CAB 2014-2018 (SKU GS-GCHVL7T112B). Ground Shaker states fit years 2014-2018 for Chevy Silverado & GMC Sierra Crew-Cab. Published outside dimensions: Height 8 1/2", Length 27 1/2", Depth 16 1/2" (labelled by Ground Shaker). Published volume: 0.80FT³. Mounting depth 5". Type: sealed. Location: FITS UNDER REAR SEAT BEHIND THE DRIVER'S SIDE; DOWN FIRING.
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).
Ground Shaker (2 x 13", sealed) off-the-shelf
BLACK 13" DUAL SEALED TW5 SUB BOX, FITS 14-18 CHEVY SILVERADO CREW-CAB (SKU GS-GCHVTW5213B). Ground Shaker states fit years 14-18 for Chevy Silverado Crew-Cab. Published outside dimensions: Height 8", Length 49 1/2", Depth 16" (labelled by Ground Shaker). Published volume: 1.28 FT^3 total; 0.64 FT^3 per subwoofer. Mounting depth 3 1/4". Type: sealed. Location: FITS UNDER REAR SEAT; DOWN FIRING. The same outside dimensions, volume and mounting depth are printed for these related listings: 13" dual [GS-GMTW5213B] (TW5 variant).
Ground Shaker (1 x 13", sealed) off-the-shelf
BLACK 13" TW5 SINGLE SEALED SUB BOX, FITS 14-18 CHEVY SILVERADO CREW-CAB (SKU GS-GCHVTW5113B). Ground Shaker states fit years 14-18 for Chevy Silverado Crew-Cab. Published outside dimensions: Height 8 1/2", Length 27 1/2", Depth 16 1/2" (labelled by Ground Shaker). Published volume: 0.80FT^3. Mounting depth 4". Type: sealed. Location: FITS UNDER REAR. Ground Shaker also lists a GMC Sierra TW5 single on the same outside dimensions (GS-GMTW5113B; TW3 GS-GMTW3110B and GS-GMTW3112B), printing 0.68 ft3.
Sound Off Audio (2 x 10", ported) off-the-shelf
2014-18 Chevrolet Silverado Crew Cab Dual 10 Ported speaker box (SKU gmcrew-14-10.2v). Sound Off Audio states fit years 2014-18 for Chevrolet Silverado Crew Cab. No outside dimensions on the product page. Published volume: 1.6 (unit not specified). Mounting depth 5.5" (depending upon woofer structure). Type: Ported. Subwoofers: Dual 10". Location: Under the seat.
Sound Off Audio (1 x 12", other (sealed/ported not stated by the maker)) off-the-shelf
2014-18 SILVERADO CREW CAB DEEP SINGLE 12" SPEAKER BOX (SKU GMCREW2014-12.1). Sound Off Audio states fit years 2014-18 for Silverado Crew Cab. No outside dimensions on the product page. Published volume: 1.2 (unit not specified on the page). Mounting depth 6-6.5" (depending upon subwoofer). Subwoofers: Single 12". Location: Under seat.
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
2014-2018 Chevy Silverado/GM Crew Single Deep box-driver side rear (SKU GMCRW2015 SNGL DEEP-DRIVER). Sound Off Audio's title says 2014-2018; its fit sentence says 2015-2016, for Chevrolet Silverado Crew Cab (1500, 2500 and 3500). Of the 2014-2018 model years here, it is stated for 2015-2016. No outside dimensions on the product page. Published volume: 0.65 cubic ft (per subwoofer). Mounting depth 6 inches (8" and 10"); 5 inches (12"). Subwoofers: Single 8, 10 or 12 inch. Location: Driver side under rear seat.
Sound Off Audio (2 x 13.5", other (sealed/ported not stated by the maker)) off-the-shelf
Dual 13.5 inch Sub Box for 2014-2016 Chevy and GMC Crew (SKU GMCRW2014 TW5 13). Sound Off Audio states fit years 2014-2016 for Chevy Silverado 1500 Crew Cab; 2015-2016 Silverado Crew; 2015 Sierra Crew. Of the 2014-2018 model years here, it covers 2014-2016 only. No outside dimensions on the product page. Published volume: 0.7 cubic ft total. Subwoofers: Dual 13.5 inch (JL Audio TW5 only). Location: Underneath the rear seat.
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
Dual DEEP Sub Box 2014-2018 Chevrolet Silverado Crew (SKU ChevyCrew 2014 dual). Sound Off Audio's title says 2014-2018 (its web address says 2014-2016); its fit text names 2014, 2015 (GMC) and 2016, for Chevrolet Silverado 1500 Crew Cab and GMC Sierra Crew Cab. Of the 2014-2018 model years here, it is stated for 2014-2016. No outside dimensions on the product page. Published volume: 0.62 cubic ft per chamber or 1.25 cubic ft mono chamber. Mounting depth 6 inches (8" and 10" subs); 5 inches (12" subs). Subwoofers: Dual 8, Dual 10, or Dual 12 subwoofers. Location: Underneath the rear seat. Sound Off Audio also lists it for the GMC Sierra (GMCREW 2015 DUAL, GMCRW2014 DUAL).
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
DUAL SUB BOX 2014-2018 CHEVY SILVERADO DOUBLE CAB (SKU GM CHVY DBL 2014 DUAL). Sound Off Audio's title says 2014-2018 (its web address says 2014-2016); its fit sentence names 2014-2016 Chevrolet and 2014 GMC Double Cabs. Of the 2014-2018 model years here, it is stated for 2014-2016. No outside dimensions on the product page. Published volume: 0.55 cubic feet per subwoofer. Mounting depth 8 inch sub: 6 inches; 10 inch sub: 5.5 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 it for the GMC Sierra Double Cab (GM DBL 2014 DUAL).
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
Dual Sub Box with Amp Rack 2014-2018 Silverado / Sierra Crew (SKU gmcrew2014 dual AR). Sound Off Audio's title says 2014-2018; its fit sentence says 2014-2016, for Chevrolet Silverado Crew and GMC Sierra Crew. Of the 2014-2018 model years here, it is stated for 2014-2016. No outside dimensions on the product page. Mounting depth 5.5 inches (can increase to 6.25 inches). Subwoofers: two 8s, two 10s or two 12s. Location: Under the rear seat.
Sound Off Audio (sealed) off-the-shelf
Single 12 Sub Box 2014-2018 Chevy GM Crew Cab Trucks (SKU GMCREW2014-15 Deep single 12 whole). Sound Off Audio's title says 2014-2018; its fit sentence says 2014-2016, for Chevrolet Silverado Crew Cab and GMC Sierra Crew Cab. Of the 2014-2018 model years here, it is stated for 2014-2016. No outside dimensions on the product page. Published volume: 1.4 cubic ft (entire sub box). Mounting depth 6.75 inches. Type: Sealed. Subwoofers: Single 12 inch (fits TW5 13 inch). Location: Under the rear bench seat.
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
Single DEEP SUB BOX-driver side for 2014-18 Chevy Silverado Crew (SKU GMCREW2014 SINGLE DEEP DRIVER SIDE). Sound Off Audio's title says 2014-18; its fit sentence names the 2014 Chevrolet Silverado 1500 and GMC Sierra 1500 1/2 ton crew cab. Of the 2014-2018 model years here, it is stated for 2014. No outside dimensions on the product page. Published volume: 0.75 cubic ft. Mounting depth 6 inches (8 and 10 inch); 5 inches (12 inch). Subwoofers: Single 8, 10 or 12 inch. Location: Driver side under the rear seat. Sound Off Audio also lists it for the GMC Sierra 1500 (GMCRW 2014 SINGLE DEEP-DRIVER SIDE; that page says it also fits the 2015 Chevrolet Silverado Crew Cab).
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
Single DEEP SUB BOX-passenger 2014-18 Chevy Silverado / GMC Crew (SKU GMCRW2015 SINGLE-passenger side). Sound Off Audio's title says 2014-18; its fit sentence says 2015, for Chevy Silverado / GMC Crew Cab. Of the 2014-2018 model years here, it is stated for 2015. No outside dimensions on the product page. Published volume: 0.65 cubic ft (per subwoofer). Mounting depth 6 inches (8 and 10 inch); 5 inches (12 inch). Subwoofers: Single 8, 10 or 12 inch. Location: Passenger side under rear seat.
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
Single DEEP Sub Box-Passenger for 2014-18 Chevy Silverado 1500 Crew (SKU GMCREW2014 SINGLE passenger). Sound Off Audio's title says 2014-18; its fit sentence names the 2014 Chevrolet Silverado 1500 and GMC Sierra 1500 1/2 ton crew cab. Of the 2014-2018 model years here, it is stated for 2014. No outside dimensions on the product page. Published volume: 0.65 cubic ft (total). Mounting depth 6 inches (8 and 10 inch); 5 inches (12 inch). Subwoofers: Single 8, 10 or 12. Location: Under rear seat on passenger side. Sound Off Audio also lists it for the GMC Sierra 1500 (GMCRW2014 SINGLE- passenger).
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
Single Sub Box 2014-2018 Chevrolet Silverado Double Cab (SKU CHVY DBL 2014 SINGLE). Sound Off Audio's title says 2014-2018; its fit sentence says 2014-2016, for Chevrolet Silverado Double Cab. Of the 2014-2018 model years here, it is stated for 2014-2016. No outside dimensions on the product page. Published volume: 0.6 cubic feet (total). Mounting depth 5.2 inches (8 and 10 in); 5 inches (12 in). Subwoofers: Single 8, 10 or 12 inch. Location: Under the rear seat on the driver's side.
Sound Off Audio (4 x 8", ported) off-the-shelf
VENTED 2014-2018 Chevy Silverado Crew and GMC Sierra Crew Sub Box (SKU GMCRW2014 QUAD PORTED). Sound Off Audio's title says 2014-2018; its fit text lists 2014 and 2015-2016, for Chevy Silverado Crew and GMC Sierra Crew (1500 half ton). Of the 2014-2018 model years here, it is stated for 2014-2016. No outside dimensions on the product page. Published volume: 2.1 cubic ft (mono chamber). Mounting depth 5.8 inches. Type: Ported (vented). Subwoofers: Four 8-inch.
Super Crew Sound (other (sealed/ported not stated by the maker)) off-the-shelf
Chevy Silverado / GMC Sierra Double Cab 2014 - 2020 Single Subwoofer Box (SKU 14ChevyDCsingle). Super Crew Sound states fit years 2014-2020 for Chevy Silverado / GMC Sierra Double Cab. No outside dimensions on the product page. Published volume: .55 cubic foot. Mounting depth 5.5"; Mounting Depth 12" Sub: 5"; Mounting Depth based on: 6" diameter magnet. Subwoofers: Fits 8, 10 or 12 inch subwoofers. Location: Fits under rear seat; Subs fire down. Hole cutouts 8" 7", 10" 9 1/8", 12" 11". 1 1/2" clearance under the box. 5/8" MDF.
Super Crew Sound (other (sealed/ported not stated by the maker)) off-the-shelf
Chevy Silverado & GMC Sierra Crew Cab 2014-2022 Dual Subwoofer Box (SKU 14ChevyDCdual). Super Crew Sound states fit years 2014-2022 for Chevy Silverado/GMC Sierra Crew Cab. No outside dimensions on the product page. Published volume: .625 cubic foot Per Sub (1.25 total Mono Chamber). Mounting depth 5.2" (8" & 10") (Optional 5.7"); 4.7" (12") (Optional 5.25"); 2019+ Version 4.00" (Optional 4.625"). Subwoofers: Fits two 8, 10 or 12 inch subwoofers. Location: Fits under rear seat; Subs fire down. Maker notes: Fits 2014-2022 Chevy Silverado/GMC Crew Cab 1500; Fits 2015-2022 Chevy Silverado/GMC Crew Cab 2500/3500 HD. (Does not fit 2014 2500/3500 HD). Hole cutouts 8" 7", 10" 9 1/8", 12" 11". Box divider included.
Super Crew Sound (other (sealed/ported not stated by the maker)) off-the-shelf
Chevy Silverado Crew Cab 2014-2021 Single Subwoofer box (SKU 2014ChevyCCsingle). Super Crew Sound states fit years 2014-2021 for Chevy Silverado/GMC Crew Cab. No outside dimensions on the product page. Published volume: .625 cubic foot. Mounting depth 5" (8" & 10") (Optional 5 5/8"); 4 3/8" (12") (Optional 5."). Subwoofers: Fits one 8, 10 or 12 inch subwoofers. Location: Fits under rear seat; Subs fire down. Hole cutouts 8" 7", 10" 9 1/8", 12" 11". 1 1/2" clearance under the box.

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