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
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | cargo area behind 3rd row (seats up) |
|---|---|
| Outer bounding box | 49"W x 14"H x 31"/33"D — carried forward from the 2015-2020 generation's confirmed measurement, same T1XX-family cargo geometry, not an independently re-measured figure for 2021-2024. Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: SRQ Customs 'Chevy Tahoe and GMC Yukon Subwoofer Enclosure': 50 x 22 x 8 in (as printed; axes not labelled), 1.2 ft3, rear cargo area compartment (sits on top, or lower if the compartment door is removed); not XL. 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 95-24 CHEVY TAHOE (w/3rd row seat)': Height 18", Length 25 1/2", Top Depth 10 1/4", Bottom Depth 13 1/2" (labelled by Ground Shaker), 1.53 FT3, behind the 3rd row seat; Ground Shaker 'BLACK 10" DUAL SEALED SUB BOX, FITS 95-24 CHEVY TAHOE (w/3rd row seat)': Height 18", Length 41 1/2", Top Depth 10 1/4", Bottom Depth 13 1/2" (labelled by Ground Shaker), 2.58 FT3 (2 chambers), behind the 3rd row seat. |
| Known obstructions | None specifically documented |
| Usable volume estimate | 8 ft³ |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x8" or 1x10" factory-style, driver-side cargo trim panel (400W RMS) |
|---|---|
| Box type | sealed |
| Location | driver-side cargo trim panel, zero cargo loss |
| Subwoofers | 1x12" or 1x15" standalone |
|---|---|
| Box type | sealed or ported |
| Location | cargo area behind 3rd row |
Sizes and depths below are what research turned up for this generation. Confirm against your own vehicle before cutting or ordering — trim levels vary.
| Factory speaker size | unconfirmed for this exact generation — aftermarket 6.5" replacements are sold as compatible with 2015-2022 model years, which HINTS this generation may share the prior gen's size, but not independently confirmed as factory-original. Separate hint pointing the other way: a named aftermarket pod product for '2021-2025 Chevy/GMC Fullsize SUV' front doors is sized for dual 8" — a genuinely bigger capacity than the 6.5" convention on prior generations, though this describes pod capacity, not confirmed factory-original size. |
|---|---|
| Adapter bracket needed | unconfirmed |
| Tweeter | A-pillar — confirmed, and clean binary: Bose-equipped models HAVE A-pillar tweeters, non-Bose models do NOT have this location at all (rather than a smaller/simpler version). |
| Factory speaker size | unconfirmed for this exact generation — 6.5" rear door adapter plates are sold for 2015-2024 Tahoe, same caveat as front |
|---|---|
| Adapter bracket needed | unconfirmed |
| Tweeter | n/a — tweeter is front A-pillar only |
| Factory amp / premium audio | Specific, two-tier finding for this generation's Yukon Denali line (Tahoe-specific trim gating not independently confirmed). Yukon Denali: 14-speaker Bose system with Richbass woofer, AudioPilot, Centerpoint, and SurroundStage processing. Yukon Denali Ultimate (introduced 2023, a real mid-cycle top-trim addition — not present since this generation's 2021 start): steps up to an 18-speaker Bose system that adds headrest-integrated speakers, a real architectural difference from the 14-speaker tier, not just a count bump. |
|---|---|
| Adding subs without a head-unit swap | Confirmed straightforward — both the driver-side trim panel product and a standalone cargo build avoid the head unit |
| Head unit | No replacement needed |
CONFIRMED PER-GENERATION PRODUCT FOUND: a 400W RMS subwoofer specifically listed for '2021-Up Chevrolet and GMC Full-Size SUVs' installs behind the driver-side cargo trim panel — this is a genuine 2021-2024-specific product, not a carried-over older-gen listing. Cargo behind 3rd row (seats up) carries forward the same measured figures as the 2015-2020 page: 49"W x 14"H x 31"/33"D — one commercial enclosure explicitly lists '2015-2025' compatibility for Tahoe/Yukon (not XL), which combined with the shared T1XX platform continuity is a reasonable (not identical-part-number-confirmed) basis for carrying this cargo geometry forward. Chevrolet also offers a factory-style enclosed subwoofer fitting in the small space beneath the rear seat.
Outside links. Some are commercial products, some are owner builds posted on forums — the label says which. We do not endorse any of them.
Each link opens the tool with this vehicle already selected.
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.