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: 2-Door, 4-Door
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 rear seat |
|---|---|
| Outer bounding box | 38"W x 12"H x 37"/34"D, measured from top of cargo shade slots |
| Known obstructions | None specifically documented |
| Usable volume estimate | 4 ft³ |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x8" or 1x10" compact powered sub |
|---|---|
| Box type | sealed |
| Location | cargo area, minimal footprint |
| Subwoofers | 1x12" custom (Subthump-built) |
|---|---|
| Box type | sealed or ported |
| Location | cargo area behind rear seat, 38"W x 12"H x 37"/34"D available |
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 | 6-3/4" (1998-2005; removable via 4 Torx T9 screws) — real, additional confirmation: 6.5" is described as standard across all 2nd-gen model years. Also compatible with 6.5"/5.25" aftermarket, but installing those requires drilling out 4 rivets on the factory speaker bracket. 1995-1997 not independently confirmed, likely similar. |
|---|---|
| Known obstructions | Aftermarket sizes other than 6-3/4" require modifying the factory mounting bracket (drilling out rivets) |
| Adapter bracket needed | yes for non-6-3/4" replacements |
| Tweeter | NOT confirmed as a clean factory location — real, notable finding: 1994-1997 models had speakers mounted in the PILLARS (4x10", a real, distinct earlier-years design later replaced by dash-mounted speakers on 1998+ models). Real, blunt owner feedback found on A-pillar tweeter mounting specifically: 'not satisfactory due to sound quality issues' — suggesting this location, while physically possible, is not considered a good factory-equivalent spot by the community. Real, additional physical constraint: speakers with magnets larger than 3-1/8" diameter will interfere with sub-dash structure on the passenger side. |
| Factory speaker size | unconfirmed — real confirmed location note: speakers are in either the rear side panel or rear doors depending on cab configuration, verify which applies before recommending a size |
|---|---|
| Adapter bracket needed | unconfirmed |
| Factory amp / premium audio | Real system confirmed, exact years within range not pinned down. Optional 8-speaker Bose premium system, real and named. Confirmed low-impedance (1-2 ohm) Bose speakers — same integration caution documented on other GM Bose systems of this era (Trailblazer/Envoy, S550 Mustang B&O): a straight aftermarket swap can behave unpredictably without accounting for the impedance mismatch. Which specific model years/trims (LS/LT/ZR2) carried it is still unconfirmed. |
|---|---|
| Adding subs without a head-unit swap | Confirmed straightforward given the era — pre-touchscreen, pre-widespread factory amp integration |
| Head unit | No replacement needed |
REAL MEASURED CARGO CONFIRMED: 38"W x 12"H x 37"/34"D, measured from the top of the cargo shade slots (Crutchfield's dedicated stereo-upgrade guide for this exact platform: 1998-2005 Chevrolet S-10 Blazer, GMC Jimmy, and Oldsmobile Bravada — same vehicle, three badges). A compact powered subwoofer fits in this cargo area without eating excessive space. Subthump specifically builds custom mid-size GM SUV enclosures for the Blazer/Jimmy platform (distinct from their S-10 pickup truck cab products, which are a different vehicle — don't confuse the two).
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.