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, Extended Cab, Crew Cab
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | behind rear seat, Crew Cab |
|---|---|
| Outer bounding box | No independently measured raw cavity envelope found — the real American Sound Connection dual-10" product is the best available reference point. Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: NET Audio '04-12 Chevy Colorado Crew Cab Sub Box Sealed': 42.25 x 14 x 4.25 in (as printed; axes not labelled), 0.62 ft3, under rear seat; front legs temporarily unbolted. Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: Ground Shaker 'BLACK 8" SINGLE SEALED SUB BOX, FITS CHEVY COLORADO & GMC CANYON CREW-CAB 2004-2012': F-Height 4 3/4", R-Height 4 1/2", Length 30 1/8", T-Depth 13 1/2", B-Depth 10 3/4" (labelled by Ground Shaker), 0.64 FT3, under rear seat; Ground Shaker 'BLACK 10" SINGLE SEALED SUB BOX, FITS 04-14 CHEVY COLORADO CREW-CAB': Height 4 3/4", Front Length 31 3/4", Rear Length 42 1/4", Top Depth 13 1/2", Bottom Depth 11 1/2" (labelled by Ground Shaker), 0.72 FT3, under rear seat. |
| Known obstructions | Crew-Cab-specific enclosures do not fit Extended or Regular Cab body styles — a checkable body-style constraint. |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x10" sealed |
|---|---|
| Box type | sealed |
| Location | behind rear seat, Crew Cab |
| Subwoofers | 2x10" sealed (named product: American Sound Connection) |
|---|---|
| Box type | sealed |
| Location | behind rear seat, Crew Cab |
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" — specific, confirmed via retailer sourcing; 6.5" or 5.25" aftermarket speakers both fit as direct replacements. |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | no |
| Tweeter | Inside the door panel itself (where equipped) — not the typical A-pillar or sail-panel tweeter placement. |
| Factory speaker size | 6-3/4" — same as front per retailer sourcing, Crew Cab body style. |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | no |
| Tweeter | n/a — tweeter is front door only, not doubled to rear |
| Factory amp / premium audio | Premium tier for 2004-2012 not confirmed. Bose's own page lists a 7-speaker Bose system for the Colorado with no model years — it describes the current truck and does not confirm Bose on the 2004-2012 one. Secondary guides disagree about the brand: one says the only premium option was an optional Pioneer premium audio package on a few upper-trim trucks, another lists only 2-, 4- and 6-speaker systems. Neither is a maker source. |
|---|---|
| Adding subs without a head-unit swap | Confirmed straightforward — multiple commercial direct-fit products exist. |
| Head unit | No replacement needed |
Multiple, named commercial products confirmed for this exact generation's Crew Cab: American Sound Connection sells a dual-10" enclosure explicitly designed for '2004-2012 Chevy Colorado or GMC Canyon Crew Cab'; netaudio.com sells a dedicated '04-12 Chevy Colorado Crew Cab Sub Box'; Subthump's custom box line for this truck spans '2004-2014' (extending slightly past this page's 2012 cutoff). IMPORTANT COMPATIBILITY CAVEAT: some of these enclosures do NOT fit Extended Cab or Regular/Single Cab — verify cab configuration before assuming a Crew-Cab-scoped product applies. JL Audio's Crew Cab Stealthbox for this truck is sold for 2015-and-up trucks and does not fit this generation.
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.