Adding USB charging to a 1973–1987 Square Body C10 is a simple upgrade that modernizes the cab without changing the aesthetic.
Why USB Charging Matters
Modern phones, tablets, and accessories all charge via USB. A Square Body has no 12V outlet or USB port from the factory, making phone integration a constant headache.
Option 1: USB Charger in 12V Outlet
The simplest fix: add a 12V cigarette-lighter style outlet with a USB charger insert. Panel-mount outlets can be installed in the dash or center console area. A single 12V outlet wired to ignition-switched power is a weekend afternoon project.
Option 2: Dash USB Panel
Flush-mount USB charging panels with A and C ports can be built into the dash using a blank switch knockout or custom panel. These look clean and professional.
Option 3: Head Unit USB Port
If you’re upgrading to an aftermarket head unit like the Kissound 7" Double DIN, it includes a USB-C charging port that handles phone charging and data connection.
Wiring:
Run a wire from the fuse box to a switched 12V source. Use a 15A fuse inline. Connect the USB charger module and ground it to the chassis.
Consider upgrading the wiring while you’re at it — the Painless 10101 Classic Chassis Harness is the right call if the factory wiring is original and tired.
Best Speakers for 73-87 Chevy Truck:
While modernizing the audio, replace those 50-year-old paper-cone speakers too. Any quality 6.5" or 6x9" set makes a dramatic improvement.