2018 GMC Savana Speaker Sizes

The 2018 GMC Savana factory audio system includes specific mounting points, where overhead accommodate 4x6 inch speakers, front door panel support 6.75 inch units, and rear cargo area doors accept a 6x9 inch speaker size. Available compatible speaker types for system replacement and upgrade consist of full-range and midbass units.

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 6.75 Midbass / Full-Range
  • Standard installation
  • High replacement priority
  • Replacement difficulty: low
Overhead 4x6 Full-Range
  • Requires headliner removal
  • Professional service only
  • Low replacement priority
  • Replacement difficulty: high
Rear Cargo Area Doors 6x9 Full-Range
  • Access through rear opening
  • Medium replacement priority
  • Replacement difficulty: low

2018 GMC Savana Speaker Replacement Summary

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

Replacement difficulty:

Low: 2 Medium: 0 High: 1

Replacement priority:

High: 1 Medium: 1 Low: 1

Additional Notes

  • The overhead position in the 2018 GMC Savana uses a 4x6 inch oval format, which tends to limit compatibility to full-range drivers only, suggesting this location may offer less flexibility when selecting replacement units compared to other positions in the vehicle.
  • The front door panel position calls for a 6.75 inch speaker, a somewhat uncommon sizing that may narrow the available pool of compatible aftermarket options, though it does support both midbass and full-range types, which could allow for a modest degree of system configuration flexibility.
  • A midbass driver in the front door panel position would generally focus on reproducing lower-mid and bass frequencies, which may contribute to a more balanced front soundstage compared to running a full-range unit alone in that location.
  • The rear cargo area doors accommodate a 6x9 inch format, a widely available size in the aftermarket, and the full-range compatibility there suggests those positions could potentially handle a broad frequency spectrum without requiring additional driver support.
  • From a replacement priority standpoint, the front door panel position may warrant attention first, given its midbass capability, as that location tends to have a more direct influence on perceived midrange and vocal clarity within the cabin.