What size speakers are in a 1986 c10?
In a typical 1986 Chevrolet C-10 pickup, the factory radio used two dash-mounted speakers measuring 4x6 inches. The rear or optional speakers varied by cab and trim, but the front dash setup was the standard configuration. This article breaks down the stock size, variations, and upgrade options.
Stock dash speaker configuration
The majority of 1986 C-10 trucks shipped with a pair of 4x6 inch dash speakers at the lower corners of the instrument panel. They are 8-ohm units designed to work with the factory radio that year. Here is a concise overview of the stock arrangement:
- Front dash speakers: Two 4x6 inch (102 x 152 mm) speakers, 8-ohm impedance, mounted in the dash near the radio cluster.
Most regular-cab models did not include factory rear speakers, though some extended cabs or trim packages could have had an additional speaker arrangement installed by the dealer or as an option. If your truck has rear speakers, their size can vary by package and year.
Dimensions, impedance, and power considerations
Knowing the key specs helps with choosing replacements or upgrades that stay compatible with the original look and wiring. The common characteristics for the dash setup in the 1986 C-10 are:
- Impedance: 8 ohms (typical for GM factory radios of that era).
- Size: 4x6 inches for the dash speakers (102 x 152 mm).
- Power compatibility: The factory radio delivered modest power; when upgrading, 4x6 aftermarket speakers designed for car radios are a safe match—often in the 15–25W RMS range per speaker, depending on the model and head unit.
For exact numbers, check the label on your existing speakers or reference the vehicle’s service manual for your specific trim and radio package.
Upgrade options for 1986 C-10 dash speakers
If you’re looking to improve sound without major modifications, you can start with straightforward replacements or accessories. Here are common upgrade paths:
- Direct-fit 4x6 coaxial speakers that replace the factory units without adapters.
- 4x6 component sets with a separate tweeter, which may require routing or mounting adjustments for optimal placement.
- Adding a compact amplifier and a powered sub or upgraded woofer can improve bass — typically paired with a line-out converter from the factory radio, with installation performed by a pro.
Before making any upgrade decision, consider the dash space, mounting depth, and the possibility of needing mounting brackets or trim pieces. A professional installer can confirm fitment for your exact cab and radio model.
How to verify the exact size in your truck today
To confirm the precise size in your own 1986 C-10, follow these practical steps:
- Disconnect the battery to avoid shorts, then remove the dash grille or speaker cover with the appropriate trim tools.
- Carefully remove the dash speaker to measure the mounting hole diameter and the overall speaker diameter.
- Check the label on the speaker magnet or the truck’s service manual for the exact impedance (8 ohms is common for GM trucks of this era).
- Bring the measurements or the old speaker to an parts retailer to ensure you pick a direct-fit replacement.
With the measurements in hand, you can select a replacement that fits the dash opening and maintains compatibility with the factory head unit.
Summary
The standard setup in a typical 1986 Chevrolet C-10 is two 4x6 inch dash speakers in the front of the dash, usually 8-ohm. Variations exist based on cab type and optional equipment; upgrades are straightforward with 4x6 replacements or adapters for larger sizes, and professional help can assist with more advanced amplification or bass options. Confirming your exact measurements ensures proper fitment.
