What size speakers are in a 1994 Chevy Silverado extended cab?
Most 1994 Chevy Silverado extended cab models use 6.5-inch speakers in the front doors and 4x6-inch speakers in the rear doors. Exact sizes can vary based on trim level and the radio package, so it’s best to verify on your specific truck before buying replacements.
Factory speaker sizes by location
The sizes listed below reflect common configurations for the era. Variations do exist, so use them as a starting point and confirm on your vehicle.
Front doors
Front-door speakers are typically 6.5 inches in diameter, which is the standard size for many GM full-size pickups of the early 1990s. Some base-trim models or special radio packages may have smaller 5.25-inch speakers.
- Most trims: 6.5-inch (165 mm) speakers
- Some base trims: 5.25-inch speakers
In upgrading, a common approach is to use 6.5-inch replacements, with attention paid to mounting depth and bracket fit. Verify the exact size on your door by removing the panel if needed.
Rear doors
In the extended-cab configuration, the rear-door panels typically house 4x6-inch speakers, which aligns with many GM trucks from the period.
- Typically: 4x6 inches (101.6 x 152.4 mm)
When upgrading, you’ll want to confirm the mounting depth and whether adapters are needed to preserve fit and clearance behind the door panels.
How to verify your exact configuration
Use these steps to confirm the precise sizes for your particular truck. This helps ensure you buy the correct aftermarket replacements.
- Inspect the door panels and measure the mounting hole diameter of each speaker location.
- Look for the speaker part numbers or size stamps on the back of the factory units if still installed.
- Check the original build sheet, glovebox label, or the vehicle’s service/owner manual for the radio/speaker option codes.
- If you can’t access those, remove a speaker and measure the diameter and mounting depth to confirm fit.
With the exact sizes in hand, you can plan a clean upgrade that fits properly and sounds better without clearance issues or the need for excessive spacers.
Upgrade considerations
When upgrading, consider not just size but mounting depth, bracket availability, and the need for wiring adapters. Some factory openings require shallow-mount speakers, and rear-door openings may need adapter rings to accommodate slightly different sizes.
Common upgrade paths include installing 6.5-inch components or coaxials in the front doors and 4x6-inch component or coaxial sets in the rear doors, paired with a compatible head unit and, if desired, a small amplifier for improved clarity and power.
Summary
For a 1994 Chevy Silverado extended cab, the typical factory sizes are 6.5-inch front-door speakers and 4x6-inch rear-door speakers, with occasional variations depending on trim and radio package. To ensure a precise match for replacements or upgrades, verify the exact sizes on your vehicle using measurement, part numbers, or the original build information, and plan installations that respect mounting depth and fitment constraints.
