1987 GMC S15 Speaker Sizes
The 1987 GMC S15 factory audio system features dashboard locations that accommodate 4x6 inch speakers, while rear locations accept a 4x10 inch speaker size. Full-range drivers serve as a compatible replacement and upgrade for the vehicle.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 4x6 | Full-Range |
|
| Rear | 4x10 | Full-Range |
|
1987 GMC S15 Speaker Replacement Summary
2
total positions
0
easy to replace
0
high priority
0
professional only
Replacement difficulty:
Low: 0 Medium: 2 High: 0Replacement priority:
High: 0 Medium: 2 Low: 01987 GMC S15 Radio Slot Size (DIN)
| DIN Type | Size (inch) | Size (mm) | Notes |
|---|---|---|---|
| Single DIN | 7"×2" | 180×50 | Standard size for basic car radios with small display or no display |
- Always measure the slot before purchasing a new radio
- Check slot depth - it may vary
Additional Notes
- The 1987 GMC S15 features a rear speaker configuration utilizing 4x10 inch full-range units, which represents a somewhat uncommon rectangular format that may limit direct replacement options compared to round speakers.
- Dashboard positions in this vehicle accommodate 4x6 inch full-range speakers, providing a secondary sound source that contributes to front-stage audio output alongside the standard single DIN radio chassis.
- Both speaker locations are designated for full-range drivers rather than component systems, suggesting the factory audio design prioritized simplicity and cost efficiency over separation of frequency ranges.
- Upgrading the rear 4x10 speakers could potentially yield noticeable improvements in bass response and overall sound quality, as these larger rectangular drivers typically handle lower frequencies more effectively than smaller round alternatives.
- The dashboard 4x6 positions might benefit from aftermarket replacement speakers featuring improved materials such as polypropylene cones or silk dome tweeters, which could enhance clarity in the upper frequency ranges.
- Finding direct-fit 4x10 inch speakers may require searching specifically for rectangular format replacements, as this size has become less common in contemporary aftermarket speaker offerings compared to standard round formats.
- The single DIN radio specification indicates that head unit upgrades would maintain compatibility with most aftermarket receivers, potentially allowing for modern features such as Bluetooth connectivity or higher power output to drive upgraded speakers.
- Replacing speakers in the 1987 GMC S15 would likely address typical age-related deterioration such as dried surrounds, weakened voice coils, or corroded terminals that commonly affect factory speakers after several decades of use.