2000-2013 Cadillac Escalade (and Escalade EXT) 1st-3rd Gen (GMT800/GMT900 based) — 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: 4-Door SUV, EXT (pickup/SUV crossover)

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.

Standard Solid

Locationunder back seat (2000-2006, downfire) OR rear cargo area (EXT, large ported builds)
Outer bounding box2000-2006 under-seat: single-sub, ~5" mounting depth, 0.5 ft3/sub. EXT dual-15" ported: 54"W x 27"/11.75"H x 15"D, 11" mounting depth, 13.875" cutout. Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: NET Audio '2000-2006 Cadillac Escalade Sub Box Downfire Sealed': 49 x 15 x 25 in (as printed; axes not labelled), 4 ft3, behind seat (third-row area) [only 2000-2006]; NET Audio '2007-13 Cadillac Escalade Sub Box Downfire Sealed Medium Third Row': 42.25 x 13.25 x 16 in (as printed; axes not labelled), 2.69 ft3, behind seat (third row area) [only 2007-2013]. Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: Ground Shaker 'BLACK 10" DUAL SEALED SUB BOX, FITS 02-13 CHEVY AVALANCHE & CADILLAC ESCALADE': Height 19 1/2", Length 50 1/2", Top Depth 2", Bottom Depth 6" (labelled by Ground Shaker), 1.20 CUBIC FT. total; 0.60 CUBIC FT. per subwoofer, behind rear seat [only 2002-2013].
Known obstructions2015-2020 cross-badge stealth storage-bin location (shared with Tahoe/Yukon) is a separate, smaller cavity from the EXT cargo-area envelope
Usable volume estimate4 ft³

Starting points

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

Budget

Subwoofers1x8" or 1x10" sealed, 0.5 ft3, downfire
Box typesealed
Locationunder back seat

Enthusiast

Subwoofers2x12" or 2x15" ported, 4 ft3/chamber, tuned 38Hz (real example: SoundSkins EXT box)
Box typeported
Locationcargo area, large free-standing (EXT variant) or under-seat downfire

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 Unconfirmed

Factory speaker size2007-2014: 6-3/4" (also fits 5.25"/6.5" aftermarket) — confirmed: front doors are a true 3-way component setup (woofer + midrange + tweeter all in-door) on the Bose system, PLUS a separate A-pillar tweeter and a 3.5" center-dash speaker. This same multi-location architecture pattern (door 3-way + A-pillar tweeter + dash speaker) is now confirmed on BOTH this era and the 2015-2020 page — likely a persistent Escalade-wide Bose design carried across generations, not a one-off. 2000-2006: likely 6.5" per the shared Tahoe/Yukon/Escalade Crutchfield guide, not independently re-confirmed for Escalade specifically; tweeter/midrange architecture for this earlier sub-era not independently confirmed.
Known obstructionsNone specifically documented
Adapter bracket neededImportant integration caution (2007-2014): no factory wiring harness adapter exists for the A-pillar tweeter location — owners need Posi-Products splice connectors plus a universal backstrap mounting bracket (easier than fabricating a custom one). Same caution independently confirmed on the 2015-2020 companion page — a recurring Escalade-wide A-pillar integration gap.
TweeterA-pillar (confirmed, 2007-2014, real integration caution noted above) AND door-mounted (confirmed as part of the 3-way component set, 2007-2014)
MidrangeDoor-mounted (2007-2014, part of the 3-way component set)

Rear doors Unconfirmed

Factory speaker sizeunconfirmed exact size, but named commercial rear-door speaker-pod products exist for 2007-2014 (see component upgrade options) offering dual 6.5"+3.5" or dual 6.5"+4" configurations — implying the factory rear door location can accommodate at least a 6.5" primary driver plus a small secondary driver.
Adapter bracket neededunconfirmed
Midrangen/a — not confirmed

Factory audio integration

Factory amp / premium audioBose on every trim for 2011 and 2012: Cadillac's catalogs print "Bose 5.1 surround sound system, AudioPilot noise compensation technology and 10 speakers (EXT: 8 speakers)", standard on all five trims in the 2011 catalog. Other years: premium factory audio on common trims (Bose historically); the per-year trim breakdown is not confirmed from a Cadillac source.
Adding subs without a head-unit swapConfirmed straightforward — extensive direct-fit and custom product ecosystem, including large-volume ported options for serious SPL builds
Head unitNo replacement needed

Mounting locations

Standard Likely

Escalade has distinct premium/SPL audio-culture identity — deserves its own page rather than being folded entirely into the Tahoe/Yukon pages, even though it shares GM's full-size SUV platform. Rich real data across sub-eras: 2000-2006 single sub box (8" or 10", downfire under back seat, 0.5 ft3/sub, 5" mounting depth); Escalade EXT 2002-2013 dual-15" ported (54"W, 27"/11.75"H, 15"D top/bottom, 11" mounting depth, 13.875" cutout, 85 lbs, 4 ft3/chamber, tuned 38Hz) and dual-12" ported (same footprint, 11.125" cutout); custom Kicker L7 box (dual 15" or 12", 3.125 ft3/chamber x2, 47"x15"x21.5", tuned 32Hz). IMPORTANT CROSS-BADGE FINDING: a 2015-2020 product exists as a shared 3x10" down-firing stealth storage-bin box explicitly for 'Escalade, Tahoe, Yukon' together — confirms the GM full-size SUV platform-sharing found earlier extends into this generation too, not just 2007-2014.

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.

Show 4 more
  • NET Audio (sealed) off-the-shelf
    Cadillac EXT 2002-2013 2.4cuft Sealed Sub Box. NET Audio states fit years 2002-2013 (EXT). Of the 2000-2013 model years here, it covers 2002-2013 only. Published outside dimensions: 58 x 27 x 9 in (as printed; NET Audio does not label the axes). Published volume: 2.4 ft3. Mounting depth 5.74 (6.49 with metal backing plates) in. Type: sealed. Location: replaces the factory midgate, behind seat.
  • NET Audio (sealed) off-the-shelf
    Cadillac EXT 2002-2013 4.0cuft Sealed Sub Box. NET Audio states fit years 2002-2013 (EXT). Of the 2000-2013 model years here, it covers 2002-2013 only. Published outside dimensions: 58 x 27 x 12 in (as printed; NET Audio does not label the axes). Published volume: 4 ft3. Mounting depth 9 in. Type: sealed. Location: replaces the factory midgate, behind seat.
  • NET Audio (sealed) off-the-shelf
    Cadillac EXT 2002-2013 6.0cuft Sealed Sub Box. NET Audio states fit years 2002-2013 (EXT). Of the 2000-2013 model years here, it covers 2002-2013 only. Published outside dimensions: 58 x 27 x 16 in (as printed; NET Audio does not label the axes). Published volume: 6 ft3. Mounting depth 12 in. Type: sealed. Location: replaces the factory midgate, behind seat.
  • Ground Shaker (sealed) off-the-shelf
    BLACK 10" DUAL SEALED SUB BOX, FITS 02-13 CHEVY AVALANCHE & CADILLAC ESCALADE (SKU GS-AKCHV210B). Ground Shaker states fit years 02-13 for Chevy Avalanche & Cadillac Escalade. Of the 2000-2013 model years here, it covers 2002-2013 only. Published outside dimensions: Height 19 1/2", Length 50 1/2", Top Depth 2", Bottom Depth 6" (labelled by Ground Shaker). Published volume: 1.20 CUBIC FT. total; 0.60 CUBIC FT. per subwoofer. Mounting depth 4". Type: sealed. Location: behind rear seat; forward firing. Maker notes: WILL NOT AFFECT NORMAL SEATING; SUBWOOFERS WITH WIDE BASKETS OR MAGNETS MAY NOT FIT. The same outside dimensions, volume and mounting depth are printed for these related listings: 8" dual [GS-AKCHV28B]; 10" dual [GS-AKCHVL7T210B] (L7T variant).

Build it for this vehicle

Each link opens the tool with this vehicle already selected.

Before you cut anything

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.