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Car Stereo Installation & Accessories for your 2012 Avalanche

Installing an aftermarket head unit involves more than just choosing a screen; it's about building a bridge between new technology and your vehicle's factory architecture. Without the right installation accessories, a high-end receiver can't provide the seamless look or the integrated functionality your car was designed with. From dash kits that match your interior texture to complex digital interfaces that talk to your vehicle's computer, these components are what make a professional-grade installation possible.

Whether you're looking to retain your steering wheel controls, adapt a proprietary antenna plug, or ensure your new Double-DIN screen sits flush in the dash, we carry a comprehensive selection of gear from industry leaders like Metra, Scosche, PAC, and iDatalink.

Use our FitFinder to find the exact parts required for your specific year, make, and model. It's the most reliable way to ensure your DIY project results in a factory-finished look.

It's a no-brainer. Get your installation gear here.

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PAC USB-GM1

OEM USB Port Retention Cable for GM and Chrysler (Female Mini USB to Standard Male USB)

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OEM USB Port Retention Cable for GM and Chrysler (Female Mini USB to Standard Male USB)

• Retains OEM USB port when installing an aftermarket radio
• Primary Color: Black
• Female Mini USB to Standard Male USB
• Compatible with select GM & Chrysler Vehicles

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List price $29.00
-45% $15.99

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Ships in 10-14 days

• Retains OEM USB port when installing an aftermarket radio
• Primary Color: Black
• Female Mini USB to Standard Male USB
• Compatible with select GM & Chrysler Vehicles

Metra 40-CR30 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 2000-2023 vehicles from Ford, Chevrolet, Dodge

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Connect your factory antenna to a new aftermarket radio for select 2000-2023 vehicles from Ford, Chevrolet, Dodge

• Antenna Adapter Kit
• select 2000-2023 vehicles from Ford, Chevrolet, Dodge Vehicles
• For adding CD changer or other external device with built-in FM modulator

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• Antenna Adapter Kit
• select 2000-2023 vehicles from Ford, Chevrolet, Dodge Vehicles
• For adding CD changer or other external device with built-in FM modulator

iDataLink Maestro HRN-HRR-GM5 Wiring Harness

Install a New Car Stereo and Retain Steering Wheel Controls and Other Factory Features in select 2006-2022 vehicles from Chevrolet, GMC, Cadillac

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Install a New Car Stereo and Retain Steering Wheel Controls and Other Factory Features in select 2006-2022 vehicles from Chevrolet, GMC, Cadillac

• Stereo replacement harness for select 2006-2022 vehicles from Chevrolet, GMC, Cadillac
• Designed for use with Maestro RR or RR2 modules
• Retains use of steering wheel controls and factory amplifier
• Retains warning chimes, factory backup camera, Retained Accessory Power

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• Stereo replacement harness for select 2006-2022 vehicles from Chevrolet, GMC, Cadillac
• Designed for use with Maestro RR or RR2 modules
• Retains use of steering wheel controls and factory amplifier
• Retains warning chimes, factory backup camera, Retained Accessory Power

Crux DKGM-49A Stereo Replacement Interface

Stereo Replacement Interface with Steering Wheel Control Retention, and Double DIN Dash Kit for select 2012-2014 vehicles from Chevrolet, GMC

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Stereo Replacement Interface with Steering Wheel Control Retention, and Double DIN Dash Kit for select 2012-2014 vehicles from Chevrolet, GMC

• Stereo Replacement Interface with Double DIN Dash Kit
• Fits select 2012-2014 vehicles from Chevrolet, GMC Vehicles
• Works with Non-Bose, BOSE, and Y-91 amplified systems
• Accommodates ISO Double DIN Mount
• Retains steering wheel controls, chime, and factory backup camera

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List price $210.00
-36% $135.00

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• Stereo Replacement Interface with Double DIN Dash Kit
• Fits select 2012-2014 vehicles from Chevrolet, GMC Vehicles
• Works with Non-Bose, BOSE, and Y-91 amplified systems
• Accommodates ISO Double DIN Mount
• Retains steering wheel controls, chime, and factory backup camera

Raptor AD-CR1 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 2002-2025 vehicles from Ford, Chevrolet, GMC

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Connect your factory antenna to a new aftermarket radio for select 2002-2025 vehicles from Ford, Chevrolet, GMC

• Antenna to Radio Adapter Cable
• select 2002-2025 vehicles from Ford, Chevrolet, GMC Vehicles
• Adapter to aftermarket radio

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• Antenna to Radio Adapter Cable
• select 2002-2025 vehicles from Ford, Chevrolet, GMC Vehicles
• Adapter to aftermarket radio

PAC LCGM29 Wiring Interface

Install a new car stereo and retains safety warning chimes in select 2006-2021 vehicles from Chevrolet, GMC, Cadillac

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Install a new car stereo and retains safety warning chimes in select 2006-2021 vehicles from Chevrolet, GMC, Cadillac

• Provides 12-Volt accessory power (RAP)
• Compatible with non-amplified and amplified audio systems
• Micro-B USB Updatable
• No cutting or splicing required

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• Provides 12-Volt accessory power (RAP)
• Compatible with non-amplified and amplified audio systems
• Micro-B USB Updatable
• No cutting or splicing required

Axxess AXDI-GLMLN29

Install a New Car Stereo and Retain Steering Wheel Controls, Factory Chimes, and Other Factory Features in select 2006-2021 vehicles from GMC, Chevrolet, Cadillac

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Install a New Car Stereo and Retain Steering Wheel Controls, Factory Chimes, and Other Factory Features in select 2006-2021 vehicles from GMC, Chevrolet, Cadillac

• Direct connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

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• Direct connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

American International GMK318

Double DIN Stereo Dash Kit for select 2006-2025 vehicles from GMC, Chevrolet, Buick

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Double DIN Stereo Dash Kit for select 2006-2025 vehicles from GMC, Chevrolet, Buick

• Double DIN Install Dash Kit
• Compatible with select 2006-2025 vehicles from GMC, Chevrolet, Buick
• Accommodates ISO Double DIN Mount
• Painted to Match Factory Dash Color
• High-Grade ABS Plastic Construction
• Factory Style Texture

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• Double DIN Install Dash Kit
• Compatible with select 2006-2025 vehicles from GMC, Chevrolet, Buick
• Accommodates ISO Double DIN Mount
• Painted to Match Factory Dash Color
• High-Grade ABS Plastic Construction
• Factory Style Texture

Crux CRUX-2444A Wiring Harness

Install New Car Stereo and Retain Backup Camera and Rear Seat Entertainment Screen in select 2012-2014 vehicles from GMC, Chevrolet

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Install New Car Stereo and Retain Backup Camera and Rear Seat Entertainment Screen in select 2012-2014 vehicles from GMC, Chevrolet

• Rear Seat Entertainment Screen Retention Harness
• Compatible with select 2012-2014 vehicles from GMC, Chevrolet
• Retains the use of factory rear panel AV inputs
• Also retains factory camera and microphone if equipped

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• Rear Seat Entertainment Screen Retention Harness
• Compatible with select 2012-2014 vehicles from GMC, Chevrolet
• Retains the use of factory rear panel AV inputs
• Also retains factory camera and microphone if equipped

PAC GM3A-RSTX

Radio Replacement Interface with Onstar Retention for select 2006-2025 vehicles from Chevrolet, GMC, Cadillac

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Radio Replacement Interface with Onstar Retention for select 2006-2025 vehicles from Chevrolet, GMC, Cadillac

• Provides 12-Volt accessory power (RAP)
• Retains Onstar retention
• Retains factory Bluetooth
• Micro-B USB Updatable

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List price $399.00
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• Provides 12-Volt accessory power (RAP)
• Retains Onstar retention
• Retains factory Bluetooth
• Micro-B USB Updatable

Metra 40-GM20 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1958-2024 vehicles from Chevrolet, GMC, Pontiac

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Connect your factory antenna to a new aftermarket radio for select 1958-2024 vehicles from Chevrolet, GMC, Pontiac

• Factory Radio with Mini "Barbed" Connector to Aftermarket Antenna Adapter
• select 1958-2024 vehicles from Chevrolet, GMC, Pontiac Vehicles

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• Factory Radio with Mini "Barbed" Connector to Aftermarket Antenna Adapter
• select 1958-2024 vehicles from Chevrolet, GMC, Pontiac Vehicles

Axxess AXDIS-GMLN29

Install a New Car Stereo and Retain OnStar, Satellite Radio, and Other Factory Features in select 2006-2021 vehicles from GMC, Chevrolet, Cadillac

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Install a New Car Stereo and Retain OnStar, Satellite Radio, and Other Factory Features in select 2006-2021 vehicles from GMC, Chevrolet, Cadillac

• Direct connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

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• Direct connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

Axxess AXTC-LN29

Install a New Car Stereo and Retain Steering Wheel Controls and Other Factory Features in select 2006-2021 vehicles from Chevrolet, GMC, Cadillac

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Install a New Car Stereo and Retain Steering Wheel Controls and Other Factory Features in select 2006-2021 vehicles from Chevrolet, GMC, Cadillac

• Direct connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

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• Direct connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

Metra 99-3321B Dash Kit

Install a new Single-DIN or Double-DIN car stereo in select 2006-2025 vehicles from Chevrolet, GMC, Buick

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Install a new Single-DIN or Double-DIN car stereo in select 2006-2025 vehicles from Chevrolet, GMC, Buick

• Single-DIN or Double-DIN Dash Kit
• Accommodates ISO Single/Double DIN Mount
• Painted to Match Factory Dash Color
• High-Grade ABS Plastic Construction
• Factory Style Texture

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• Single-DIN or Double-DIN Dash Kit
• Accommodates ISO Single/Double DIN Mount
• Painted to Match Factory Dash Color
• High-Grade ABS Plastic Construction
• Factory Style Texture

PAC RadioPro RP4-GM32

Radio Replacement Interface With Built-In SWC Retention and Navigation Output for select 2012-2014 vehicles from GMC, Chevrolet

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Radio Replacement Interface With Built-In SWC Retention and Navigation Output for select 2012-2014 vehicles from GMC, Chevrolet

• Provides 12-Volt accessory power (RAP)
• Designed for amplified models
• Retains all safety warning chimes
• Pre-programmed to retain Steering Wheel Controls
• Micro-B USB Updatable

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• Provides 12-Volt accessory power (RAP)
• Designed for amplified models
• Retains all safety warning chimes
• Pre-programmed to retain Steering Wheel Controls
• Micro-B USB Updatable

Crux SOCGM18 Wiring Interface

Install a new car stereo and retains the safety warning chimes and other factory features in select 2006-2017 vehicles from GMC, Chevrolet, Buick

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Install a new car stereo and retains the safety warning chimes and other factory features in select 2006-2017 vehicles from GMC, Chevrolet, Buick

• Provides 12-Volt accessory power (RAP)
• Compatible with amplified and non-amplified factory audio systems
• Micro-B USB Updatable
• Color coded wires for easy installation
• No cutting or splicing required

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• Provides 12-Volt accessory power (RAP)
• Compatible with amplified and non-amplified factory audio systems
• Micro-B USB Updatable
• Color coded wires for easy installation
• No cutting or splicing required

Crux SOOGM-16 Wiring Interface

Install New Car Stereo and Retain Steering Wheel Controls and Other Factory Features In select 2006-2024 vehicles from Chevrolet, GMC, Buick

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Install New Car Stereo and Retain Steering Wheel Controls and Other Factory Features In select 2006-2024 vehicles from Chevrolet, GMC, Buick

• Provides 12-Volt accessory power (RAP)
• Compatible with non-amplified and amplified audio systems
• Micro-B USB Updatable
• Pre-programmed to retain factory Steering Wheel Controls
• Color coded wires for easy installation
• No cutting or splicing required

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• Provides 12-Volt accessory power (RAP)
• Compatible with non-amplified and amplified audio systems
• Micro-B USB Updatable
• Pre-programmed to retain factory Steering Wheel Controls
• Color coded wires for easy installation
• No cutting or splicing required

Crux SWRGM-49A Stereo Replacement Interface

Install a New Car Stereo, Retain Steering Wheel Controls, Backup Camera, and Other Factory Features in select 2012-2014 vehicles from Chevrolet, GMC with Bose Amplified and Non-Amplified Systems

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Install a New Car Stereo, Retain Steering Wheel Controls, Backup Camera, and Other Factory Features in select 2012-2014 vehicles from Chevrolet, GMC with Bose Amplified and Non-Amplified Systems

• Wiring interface for select 2012-2014 vehicles from Chevrolet, GMC
• Designed for non-amplified and amplified models
• Supports Bose, non-Bose and Y-91 audio systems
• Retains steering wheel controls, chime, backup camera
• Provides rear seat entertainment activation (requires CRUX2333A)

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• Wiring interface for select 2012-2014 vehicles from Chevrolet, GMC
• Designed for non-amplified and amplified models
• Supports Bose, non-Bose and Y-91 audio systems
• Retains steering wheel controls, chime, backup camera
• Provides rear seat entertainment activation (requires CRUX2333A)

iDataLink Maestro HRN-HRR-GM2 Wiring Harness

Install a New Car Stereo and Retain Steering Wheel Controls and Other Factory Features in select 2010-2020 vehicles from Chevrolet, GMC

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Install a New Car Stereo and Retain Steering Wheel Controls and Other Factory Features in select 2010-2020 vehicles from Chevrolet, GMC

• Stereo replacement harness for select 2010-2020 vehicles from Chevrolet, GMC
• Designed for use with Maestro RR or RR2 modules
• Retains use of steering wheel controls and factory amplifier
• Retains accessory power, Bluetooth, USB port, etc

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• Stereo replacement harness for select 2010-2020 vehicles from Chevrolet, GMC
• Designed for use with Maestro RR or RR2 modules
• Retains use of steering wheel controls and factory amplifier
• Retains accessory power, Bluetooth, USB port, etc

Axxess AXDI-GM44 Wiring Interface

Install a New Car Stereo and Retain Factory Features in select 2008-2014 vehicles from Chevrolet, GMC, Cadillac

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Install a New Car Stereo and Retain Factory Features in select 2008-2014 vehicles from Chevrolet, GMC, Cadillac

• Wiring interface to install aftermarket stereo in select 2008-2014 vehicles from Chevrolet, GMC, Cadillac
• Designed for non-amplified systems or bypassing a factory amplifier
• Provides accessory power and NAV outputs
• Retains R.A.P, chimes, balance, and fade

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• Wiring interface to install aftermarket stereo in select 2008-2014 vehicles from Chevrolet, GMC, Cadillac
• Designed for non-amplified systems or bypassing a factory amplifier
• Provides accessory power and NAV outputs
• Retains R.A.P, chimes, balance, and fade

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    FAQ Frequently asked questions in Car Stereo Installation & Accessories


    In most modern vehicles, the factory radio is part of a larger, integrated dash panel rather than a standardized rectangular box. A vehicle-specific dash kit provides the necessary brackets and trim pieces to adapt the universal ISO-mount of an aftermarket stereo to the unique shape and mounting points of your dashboard.

    Choosing the right Car Stereo Installation & Accessories begins with understanding your vehicle's make, model, and year. This information helps you select compatible wiring harnesses and mounting kits. Next, consider your audio preferences. If you're looking to upgrade your car's sound system significantly, opt for an amplifier installation kit that matches your amplifier's power requirements.Additionally, check the head unit's compatibility with your smartphone and other devices.

    Features like Bluetooth connectivity, Apple CarPlay, or Android Auto can greatly enhance your driving experience. Ensure that the accessories you choose align with your car audio goals, whether it's improved sound quality, convenience, or connectivity.

    Not if you use a Steering Wheel Control (SWC) interface. These modules translate the signals from your factory buttons into a language your new stereo understands. Many modern integration harnesses, like the iDatalink Maestro, include this functionality along with the ability to display engine data and tire pressure on your new screen.
    We strongly recommend using a wiring harness. Cutting factory wires is permanent, increases the risk of short circuits, and can void your vehicle's electrical warranty. A harness allows you to do all your soldering or crimping on the bench, then simply plug the new assembly into the factory connector without damaging the car's original wiring.

    Safety is paramount during Car Stereo Installation & Accessories installation. Start by disconnecting the car's battery to avoid electrical accidents. When handling wiring and electrical connections, follow proper insulation techniques to prevent short circuits or fires. Secure all cables and wires away from moving parts like steering columns and pedals.

    During the installation of amplifiers and subwoofers, ensure that they are securely mounted to prevent movement while driving. Avoid drilling into gas tanks, brake lines, or other sensitive areas when installing components. It's also a good practice to have a fire extinguisher and a first aid kit on hand in case of emergencies.

    All About

    Car Stereo Installation & Accessories

    Navigating the hardware required for a radio swap can be confusing. To get the job done right the first time, it's helpful to understand the specific role each accessory plays in the signal chain and the physical assembly.

    Dash Kits: The Cosmetic Foundation

    The dash kit is what ensures your new stereo doesn't look like an afterthought. These kits are engineered to match the exact color, texture, and contour of your factory dash.

    • Single-DIN Kits: Feature a 2-inch tall opening, often including a storage pocket to fill the extra space.
    • Double-DIN Kits: Feature a 4-inch tall opening designed for large touchscreens and multimedia receivers.
    • Multi-Kits: Versatile designs that can be configured for either size depending on your hardware choice.

    Wiring Harnesses and Data Interfaces

    The wiring harness is the electrical nervous system of your install.

    • Standard Harnesses: Provide basic power, ground, and speaker connections for older vehicles.
    • Data Interfaces: Required for modern vehicles with CAN-bus systems. These modules "talk" to the car’s computer to provide a 12V switched power source (which many new cars lack at the radio) and retain safety features like door chimes, OnStar, or factory amplifiers.

    Steering Wheel and Camera Retention

    Convenience and safety shouldn't be sacrificed for better sound. Dedicated interfaces allow you to keep your hands on the wheel and your eyes on the screen when reversing. If your vehicle has a factory backup camera, a camera retention adapter allows you to feed that video signal directly into your new touchscreen's RCA input.

    Professional Installation Tools

    Using the wrong tools can lead to cracked plastic or scratched leather. A set of nylon trim removal tools is essential for prying off dash panels without leaving permanent pry marks. Additionally, we recommend high-quality crimp connectors or heat-shrink tubing to ensure your electrical connections remain stable through years of vehicle vibration.

    The Sonic Electronix Advantage

    We take the guesswork out of the DIY process. When you use our vehicle selector, we don't just show you parts that "might" work; we curate a list of accessories verified to fit your specific cabin. As an Authorized Online Retailer for reputable brands, every interface and kit we sell is backed by full technical support to help you through the trickiest parts of your installation.

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    We love people and we're ready to help you! See what separates us from our competition.

    Take advantage of our VIP rewards like 10% back on your purchases, free 2-day shipping, extended warranties, and free returns! Gain access to all of these rewards without any membership fees.
    Get great discounted (and possibly FREE) installation accessories with most car stereo purchases. This includes dash kits, wiring harnesses and antenna adapters that you will need to properly install your new car stereo.
    We are an Authorized Dealer for all the brands we sell, including the most premium brands in car and marine audio such as Hertz, JL Audio, NVX, Rockford Fosgate, Kicker, Alpine, Kenwood and many more.
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    We have information on brands, gear, and more for you to explore! Check out our YouTube Channel for helpful how-to videos, product reviews, and Q&As. For a more detailed look, also visit our Learning Center!
    Our trained experts are here to assist you! They are just a phone call or click away to help you get the right gear for you and your vehicle!
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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
    • You get the correct accessories the first time

    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.