Product Description
The Suburban personifies the flashes with the attention of a shooting star in the middle of a summer night sky. Most of the elegance of the classic vehicles, the Suburban cars came outfitted with some of the very first AM radio designs. Although you may not have any desire for the outdated technology, you still had to have the look. And this has become one of the many things that true and loyal car collectors love about the Suburban. The challenge for the insatiable collector is to keep that stock setup with modern sound capabilities. Let’s face it, no matter how flawless your Suburban looks on the outside, you must have the quality sounds to go with it. When it comes down to it, you just can't get fair quality sound out of old technology. Yet, all is not lost my dear collector friends. The brilliant minds of Custom Autosound has developed the USA-740. This innovative design unites that classic look with the most-advanced technology.
Custom Autosound USA-740 Classic Car Radio With Bluetooth USA-740 Radio with Bluetooth Features:
- AM/FM Radio Bluetooth, USB & Auxiliary Inputs
- Option to Add CD-1, Single CD Player
- Bluetooth is Built Into the Radio
- Fits in your Original Dash Opening Without Cutting
- 3.5mm Aux Input on Front of Radio
- RCA Aux Input On Back
- Change Display Lettering Color
- Digital Tuner
- RDS Song/Artist Information
- 5 Channel RCA Pre-Outs w/ Subwoofer Control
- Separate Bass & Treble Control
- 5 EQ Presets
- Fader and Balance Control
- 15 FM & 10 AM Pre Sets
- Seek/Scan Function
- Back by a 2 Year Warranty from the Manufacturer
Trust us when we say that the ground-breaking minds of Custom Autosound have worked really hard to cater to your every sound system desire. You will discover that your modern sound is just an online order away and you will praise the minds that came up with this technology. The original Suburban utilizes a positive ground electrical framework; the vast majority of the original stereos available today only operate with a negative ground electrical framework. The installation of a customized USA-740 eliminates this along with all other obstacles instantly. The correct wiring system is already in place and Custom Autosound makes the conversion as simple as watering a plant with any and all potential issues already taken care of for you. After installing the 740 system, you can enjoy the pleasures of pure sounds coming from that original look.
The innovators at Custom Autosound backs their USA-740 with a multi-year warranty. The story is re-written for the Suburban from the inside out. The explorer in you knew the adventure wasn’t complete without a real audio system with today’s technology. What was once an impossibility is now a click away from restoration glory.
USA-740 IN DASH AM/FM for Suburban: Frequently Asked Questions
Do I need to modify the Suburban dash to install it?
This listing is the version made for the Suburban, designed to go into the original dash opening. Custom Autosound says its radios fit without altering or cutting the original dash.
Can I add a CD player or Bluetooth?
Check the CD options on this page, which include Single Slave CD.
Will it work with a 6-volt system?
What can the USA-740 do?
You can pick from multiple LCD colors to match your gauges, with a dimmer, and it fully controls the optional CD-1 player. Custom Autosound rates it at 300 watts peak, and it adds hi-volt 4-channel RCA pre-outs plus a subwoofer line-out.
Will it keep the stock look of my Suburban dash?
Yes. It's built to keep the original look in the Suburban dash while adding modern features.
Why does the order ask about factory air?
Select Yes or No under Factory Air so we send the correct setup for your Suburban's dash.
USA-740 specifications
- Bluetooth built in (streaming and hands-free calling)
- 300 watts peak power (45W x 4 RMS, 2-ohm stable)
- AM/FM stereo tuner
- 2 AUX inputs (3.5 mm front and RCA rear)
- USB port
- Direct control for optional CD-1
- 5-channel RCA pre-outs including subwoofer pre-out and control
- 15 FM and 10 AM presets
- 7-color LCD with dimmer; RDS station/song/artist display
- DSP EQ; auto-store presets
- Electronic tuning and volume; separate bass/treble; 4-way fader; L/R balance
- Power antenna lead; digital clock
- USA/EUR/JAP/RUS tuner capability (USA default)
- Custom Autosound 2-year manufacturer warranty
USA-740 wiring and tech tips
Use this as a head-unit reference for power, ground, antenna, speakers, and amplifier connections. Always match the printed diagram that ships with your unit if it differs.
Power and ground (typical Custom Autosound harness)
| Function | Wire color |
|---|---|
| Ignition / ACC +12V | Red |
| Battery / constant +12V | Yellow |
| Ground | Black |
| Power antenna | Blue |
Ignition and power-antenna leads are commonly fused at 1A on the harness—confirm against the guide that ships with your radio.
Speaker wiring (typical)
| Speaker | Wire color |
|---|---|
| Left front + / − | White / White-Black |
| Right front + / − | Gray / Gray-Black |
| Left rear + / − | Green / Green-Black |
| Right rear + / − | Violet (or Purple) / Violet-Black |
USA-740 extras
Expect antenna, USB, microphone (Bluetooth), CD-1, and subwoofer RCA connections in addition to front/rear line outs. Use the front 3.5 mm AUX or rear RCA AUX for wired sources.
Suggested order for a classic Suburban
- Disconnect the vehicle battery before any wiring.
- Connect ground first, then constant (yellow) and ignition (red).
- Connect the antenna plug and the blue power-antenna lead if your car has a power antenna.
- Wire all four speakers, matching polarity.
- If using an amplifier, run RCA cables from the front/rear (and sub on USA-740/USA-850) pre-outs.
- Reconnect the battery and test radio, speakers, and charging system voltage.
Tech tips for classic Suburban
- This radio is sold for the factory Suburban opening used in classic models—do not cut a modern DIN rectangle if you want a stock look.
- A poor ground is the most common cause of whine or weak audio; scrape paint at the ground point and use a star washer.
- If AM reception is weak, check the antenna mast, cable continuity, and that the antenna plug is fully seated.
- Vintage Car Radio does not install radios. If you are not comfortable with 12V wiring, use a qualified installer.
USA-740 manuals
Download the manufacturer guide for operation, safety, and the official wiring diagram. You can also browse our full library on the Manuals page.
Vintage Car Radio does not offer installation. The manuals are for do-it-yourself reference or to share with your installer.
Two-Year Custom Autosound Warranty
All Custom Autosound radios sold by Vintage Car Radio are backed by a 2-year manufacturer warranty from Custom Autosound.
Radios are checked before shipping. If something is wrong out of the box or under warranty, call us at 844-802-4499 or 574-226-6676 and we will help coordinate with the manufacturer.
Vintage Car Radio does not offer installation services. Refer to the Manuals and Wiring / Tech Tips sections for manufacturer guidance, or use a qualified car-audio installer.
FAQ — classic Suburban USA-740
Will this fit my classic Suburban without cutting the dash?
It is built for the original radio opening used on classic Suburban models. Compare your dash opening and bezel to the product photos. We do not modify dashes in-house.
Does this radio have Bluetooth?
Yes—Bluetooth is built into the USA-740 for streaming and hands-free calling.
Do I need an amplifier?
Many owners run speakers directly from the radio. Pre-outs are there if you want more volume or a subwoofer later.
Do you install the radio?
No. Vintage Car Radio ships the unit and documentation; installation is DIY or by a shop you choose.
What is the warranty?
Custom Autosound radios include a 2-year manufacturer warranty. See the Warranty section for details.
Need help?
Call 844-802-4499 or 574-226-6676.
Specs
Wiring / Tech Tips
Manuals
Warranty
Two-Year Custom Autosound Warranty
All Custom Autosound radios sold by Vintage Car Radio are backed by a 2-year manufacturer warranty from Custom Autosound.
Radios are checked before shipping. If something is wrong out of the box or under warranty, call us at 844-802-4499 or 574-226-6676 and we will help coordinate with the manufacturer.
Vintage Car Radio does not offer installation services. Refer to the Manuals and Wiring / Tech Tips sections for manufacturer guidance, or use a qualified car-audio installer.
