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 Crossover
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 |
|---|---|
| Outer bounding box | No independently measured raw cavity envelope found. |
| Known obstructions | None specifically documented beyond the general EV battery-under-floor packaging typical of the Ultium platform — not independently measured for cargo impact. |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x12" self-powered low-profile (real named option: Kicker 51HS12 Hideaway, 230W RMS, built-in amp, fits under seat/tight spaces) OR 1x8"/10" generic powered, tapping rear door speaker line signal |
|---|---|
| Box type | n/a — integrated powered unit, factory-tap wiring |
| Location | cargo area or under seat |
| Subwoofers | 1x12" dual-2-ohm sealed custom fiberglass (real documented build: Audio Dynamics 2212, mounted vertically on the cargo wall above the factory sub location, wired to 1-ohm for max output), with proper 5V-aware remote-turn-on wiring |
|---|---|
| Box type | sealed, custom fiberglass |
| Location | cargo area, driver-side wall mount |
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 | not independently confirmed by exact size |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | unconfirmed |
| Tweeter | Dash-mounted — real, confirmed location: the horizontal part of the dashboard, with left and right tweeters near the corners where the A-pillar, dash, and windshield intersect. A real, specific, distinctive placement worth noting precisely rather than generalizing to 'A-pillar.' |
| Factory speaker size | not independently confirmed by exact size — real confirmed tap point: rear door speaker line taps are used as part of the documented install approach. |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | unconfirmed |
| Tweeter | n/a — tweeter is dash-mounted, not doubled to rear doors |
| Factory amp / premium audio | Real, confirmed trim breakdown found: 2024 LT and RS AWD trims come standard with a 6-speaker system; 2024 RS RWD gets the Bose premium 8-speaker system; the 2025 SS trim includes Bose as standard equipment. Bose premium system (available on top trims): real, active owner discussion exists specifically about upgrading FROM this factory Bose system, implying real, documented dissatisfaction or at least real upgrade interest even on the top trim. |
|---|---|
| Adding subs without a head-unit swap | Confirmed via a real, detailed installation approach: power run from the 12V battery to the amp, a short ground to chassis, line taps to a rear door speaker for signal, and remote-sense wiring. GENUINELY IMPORTANT EV-PLATFORM-SPECIFIC GOTCHA, worth flagging prominently: the start/stop ignition circuit on the Ultium EV platform runs at 5V, NOT the standard 12V most aftermarket amp remote-turn-on circuits expect — this causes real, documented problems for installers who assume a standard 12V remote-turn-on signal is available. Verify voltage before wiring a remote-turn-on lead on this specific platform. |
| Head unit | No replacement needed |
No named commercial molded enclosure was confirmed — real, current, active owner community (blazerevforum.com) discusses both adding a powered sub to non-Bose systems and upgrading the Bose system on top-tier (SS) trims.
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.