1999 GMC Safari Speaker Sizes

The 1999 GMC Safari factory audio system features specific location configurations. The front door panel accommodates a 1 inch speaker size, and the d-pillar accepts 4 inch speakers. Additionally, the front door panel and tail gate support 6.5 inch units. Tweeter, midrange, midbass, and full-range types serve as a replacement and upgrade path.

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

Speaker Details by Location
Location Size Type Notes
D-Pillar 4 Midrange
  • Extremely difficult access
  • Professional service only
  • Low replacement priority
  • Replacement difficulty: high
Front Door Panel 1 Tweeter
  • Standard installation
  • High replacement priority
  • Replacement difficulty: low
Front Door Panel 6.5 Midbass / Full-Range
  • Standard installation
  • High replacement priority
  • Replacement difficulty: low
Tail Gate 6.5 Midbass / Full-Range
  • Access through rear opening
  • Medium replacement priority
  • Replacement difficulty: low

1999 GMC Safari Speaker Replacement Summary

4 total positions
3 easy to replace
2 high priority
1 professional only

Replacement difficulty:

Low: 3 Medium: 0 High: 1

Replacement priority:

High: 2 Medium: 1 Low: 1

1999 GMC Safari 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 Safari utilizes a multi-location speaker configuration with different sizes serving distinct frequency ranges across the cabin.
  • Front door panels accommodate dual speaker positions with both 1-inch tweeter mounts and 6.5-inch midbass or full-range speaker locations, suggesting a component-style setup may have been intended in the factory design.
  • The D-pillar positions feature 4-inch midrange speakers, which typically handle vocal and mid-frequency content to fill the rear listening area.
  • Tailgate mounting locations accept 6.5-inch speakers in either midbass or full-range configurations, providing flexibility for rear audio coverage depending on system design.
  • Replacing the front door 6.5-inch speakers would likely yield the most noticeable improvement in overall sound quality, as these positions handle critical midrange frequencies and bass response in the primary listening zone.
  • The 1-inch tweeter positions allow for high-frequency extension when paired with aftermarket component speaker systems, though standalone tweeter replacement may provide only modest improvements without corresponding midbass upgrades.
  • D-pillar midrange speakers might benefit from replacement if rear-seat audio quality is a concern, though their contribution to front-seat listening is typically secondary.
  • Tailgate speakers face challenges with coupling and enclosure volume, which may limit their effectiveness compared to traditional door-mounted installations.
  • The single DIN radio opening provides compatibility with most aftermarket head units without requiring dash modification or adapter kits.