1999 GMC P3500 Speaker Sizes

The 1999 GMC P3500 factory audio system features front door panel and rear door panel locations that accommodate 6.5 inch speakers. Midbass and full-range units serve as compatible speaker types for a replacement upgrade. A 6.5 inch speaker size applies to both mentioned areas.

Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.

Speaker Details by Location
Location Size Type Notes
Front Door Panel 6.5 Midbass / Full-Range
  • Standard installation
  • High replacement priority
  • Replacement difficulty: low
Rear Door Panel 6.5 Midbass / Full-Range
  • Standard installation
  • Medium replacement priority
  • Replacement difficulty: low

1999 GMC P3500 Speaker Replacement Summary

2 total positions
2 easy to replace
1 high priority
0 professional only

Replacement difficulty:

Low: 2 Medium: 0 High: 0

Replacement priority:

High: 1 Medium: 1 Low: 0

1999 GMC P3500 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 1999 GMC P3500 door panels accommodate 6.5 inch speakers in both front and rear locations, providing multiple replacement opportunities throughout the cabin.
  • Factory speaker locations accept either midbass or full-range driver configurations, allowing flexibility in component selection based on system design preferences.
  • Midbass drivers typically focus on reproducing mid-frequency and lower-frequency content, while full-range speakers attempt to handle a broader frequency spectrum within a single driver unit.
  • Replacing door panel speakers tends to yield noticeable improvements in clarity and output capability compared to original equipment installations.
  • The single DIN radio opening permits integration of aftermarket head units with modern features while maintaining standard installation dimensions.
  • Both front and rear door positions sharing identical sizing may simplify component sourcing and installation planning.
  • Full-range speakers might serve adequately for basic listening applications, though dedicated component systems with separate tweeters often provide enhanced high-frequency response.
  • Door mounting locations generally benefit from proper sealing and sound deadening treatment to reduce panel resonance and improve bass response.