2004 GMC Sierra 3500 Speaker Sizes
The 2004 GMC Sierra 3500 factory audio system features specific mounting locations for various drivers. The a-pillar and rear door panel accommodate 1 inch speakers. Meanwhile, the center console accepts a 6.5 inch speaker size. Furthermore, the front door panel and rear door panel support 6.75 inch units, whereas the rear door panel accommodates 4x6 inch speakers. Compatible speaker types for a replacement or upgrade consist of tweeters, full-range, and midbass drivers.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| A-Pillar | 1 | Tweeter |
|
| Center Console | 6.5 | Midbass / Full-Range |
|
| Front Door Panel | 6.75 | Midbass / Full-Range |
|
| Rear Door Panel | 4x6 | Full-Range |
|
| Rear Door Panel | 1 | Tweeter |
|
| Rear Door Panel | 6.75 | Midbass / Full-Range |
|
2004 GMC Sierra 3500 Speaker Replacement Summary
6
total positions
4
easy to replace
1
high priority
1
professional only
Replacement difficulty:
Low: 4 Medium: 1 High: 1Replacement priority:
High: 1 Medium: 4 Low: 12004 GMC Sierra 3500 Radio Slot Size (DIN)
| DIN Type | Size (inch) | Size (mm) | Notes |
|---|---|---|---|
| Single DIN or Double DIN | 7"×2" or 7"×4" | 180×50 or 180×100 | Vehicle supports both radio sizes |
- Always measure the slot before purchasing a new radio
- Check slot depth - it may vary
Additional Notes
- The front door panels on the 2004 GMC Sierra 3500 accommodate 6.75-inch speakers, which represent the largest available mounting locations and would typically be prioritized for aftermarket replacement to achieve the most substantial audio improvement.
- Multiple locations throughout the cabin accept tweeter installations, including the A-pillars and rear door panels with 1-inch mounting points, allowing for enhanced high-frequency response when paired with larger midbass or full-range drivers.
- The rear door panels feature a dual-speaker configuration with both 4x6-inch full-range and 6.75-inch midbass/full-range mounting options, plus 1-inch tweeter locations, providing flexibility for component system installations.
- Center console placement of a 6.5-inch speaker location offers an additional audio staging option, though this position may present imaging challenges compared to the standard door-mounted configurations.
- Full-range speakers can be installed in the 4x6-inch, 6.5-inch, and 6.75-inch positions, while dedicated midbass drivers are compatible with the two larger sizes, enabling either simple replacements or more complex component system builds.
- The factory radio openings support both single DIN and double DIN head units, providing compatibility with a wide range of aftermarket receivers without requiring dash modifications or adapter kits.