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2012 GMC Sierra 3500 HD

Get all the stereo installation accessories for your 2012 GMC Sierra 3500 HD so you can install your new stereo like a pro.

Stereo Installation Accessories for 2012 GMC Sierra 3500 HD

If you are looking to buy a stereo, then you've come to the right place. We guarantee fitment and we offer free/discounted install accessories on nearly all our stereos for nearly all vehicles! Look at each product tile in the category listing or visit the car stereo product pages for more details.

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PAC GMRVD

Rear Seat DVD Entertainment System Retention and Monitor Add-on Cable for select 2007-2014 vehicles from Chevrolet, GMC, Cadillac

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Rear Seat DVD Entertainment System Retention and Monitor Add-on Cable for select 2007-2014 vehicles from Chevrolet, GMC, Cadillac

• Overhead rear seat entertainment (RSE) LCD retention cable
• Compatible with select 2007-2014 vehicles from Chevrolet, GMC, Cadillac
• Routes the AV signals from the factory radio to an aftermarket RSE monitor

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Fits your Sierra 3500 HD
4
List price $89.00
-55% $39.99

In stock

Only 3 Left!

• Overhead rear seat entertainment (RSE) LCD retention cable
• Compatible with select 2007-2014 vehicles from Chevrolet, GMC, Cadillac
• Routes the AV signals from the factory radio to an aftermarket RSE monitor

Axxess AXUSBM-A

Factory USB Port Retention Adapter in select 2009-2025 vehicles from Chevrolet, GMC, Cadillac

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Factory USB Port Retention Adapter in select 2009-2025 vehicles from Chevrolet, GMC, Cadillac

• Factory USB Retention Adapter
• Retains the OE USB port on compatible stereos
• Compatible with select 2009-2025 vehicles from Chevrolet, GMC, Cadillac

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Fits your Sierra 3500 HD
1
List price $5.99
-17% $4.99

In stock

• Factory USB Retention Adapter
• Retains the OE USB port on compatible stereos
• Compatible with select 2009-2025 vehicles from Chevrolet, GMC, Cadillac

Axxess AXUSBM-B USB

Factory USB Port Retention Adapter in select 2009-2023 vehicles from GMC, Chevrolet, Dodge

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Factory USB Port Retention Adapter in select 2009-2023 vehicles from GMC, Chevrolet, Dodge

• Factory USB Retention Adapter
• Retains the OE USB port on compatible stereos
• Compatible with select 2009-2023 vehicles from GMC, Chevrolet, Dodge

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Fits your Sierra 3500 HD
3
List price $15.99
-13% $13.99

In stock

• Factory USB Retention Adapter
• Retains the OE USB port on compatible stereos
• Compatible with select 2009-2023 vehicles from GMC, Chevrolet, Dodge

Axxess AXBUCH-GM2

Install a New Car Stereo and Retain Backup Camera in select 2008-2019 vehicles from Chevrolet, Cadillac, GMC

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Install a New Car Stereo and Retain Backup Camera in select 2008-2019 vehicles from Chevrolet, Cadillac, GMC

• Camera retention and add-on harness
• Compatible with select 2008-2019 vehicles from Chevrolet, Cadillac, GMC
• Retains the factory backup camera to an aftermarket radio

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1
List price $11.99
-17% $9.99

In stock

• Camera retention and add-on harness
• Compatible with select 2008-2019 vehicles from Chevrolet, Cadillac, GMC
• Retains the factory backup camera to an aftermarket radio

iDataLink Maestro ACC-NAV1

Connect Factory GPS Antenna to Select Alpine and Kenwood Navigation Stereos

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Connect Factory GPS Antenna to Select Alpine and Kenwood Navigation Stereos

• Fakra on factory GPS to select Alpine and Kenwood stereo
• Includes 9" GPS antenna adapter cable
• Plug-n-play, easy installation

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1
List price $21.99
-23% $16.99

In stock

• Fakra on factory GPS to select Alpine and Kenwood stereo
• Includes 9" GPS antenna adapter cable
• Plug-n-play, easy installation

Scosche GM40B Wiring Harness

Install a new car stereo in select 2004-2021 vehicles from GMC, Chevrolet, Pontiac

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Install a new car stereo in select 2004-2021 vehicles from GMC, Chevrolet, Pontiac

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

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1
$6.99

In stock

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

Crux USB-MIN2

USB Adaptor for Select 2010-Up Buick Cadillac Chevy Chrysler Dodge GMC Jeep and RAM Vehicles

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USB Adaptor for Select 2010-Up Buick Cadillac Chevy Chrysler Dodge GMC Jeep and RAM Vehicles

• USB to USB Mini Adaptor
• For Select General Vehicles

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Fits your Sierra 3500 HD
List price $25.20
-36% $16.20

Available

Ships in 10-14 days

• USB to USB Mini Adaptor
• For Select General Vehicles

iDataLink Maestro ACC-NAV2

Connect Factory GPS Antenna to Select Pioneer Navigation Stereos

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Connect Factory GPS Antenna to Select Pioneer Navigation Stereos

• Fakra on factory GPS to select Pioneer stereos
• Includes 9" GPS antenna adapter cable
• Plug-n-play, easy installation

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Fits select models only.
Add details to confirm fitment.
List price $21.99
-23% $16.99

In stock

• Fakra on factory GPS to select Pioneer stereos
• Includes 9" GPS antenna adapter cable
• Plug-n-play, easy installation

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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Fits your Sierra 3500 HD
List price $29.00
-45% $15.99

Available

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

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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found car based on your search
Fits your Sierra 3500 HD
1
List price $115.99
-14% $99.99

In stock

• 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 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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Fits your Sierra 3500 HD
List price $22.47
-36% $14.45

In stock

• 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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Fits select models only.
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List price $399.00
-23% $309.00

In stock

Only 3 Left!

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

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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List price $379.00
-53% $176.99

In stock

Only 3 Left!

• 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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found car based on your search
Fits your Sierra 3500 HD
1
List price $117.60
-36% $75.60

In stock

• 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 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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Fits your Sierra 3500 HD
List price $195.30
-36% $125.55

In stock

Only 2 Left!

• 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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Fits select models only.
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List price $91.99
-13% $79.99

In stock

• 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

iDataLink ACC-PAD1

Install a New Car Stereo and Match Signal Level in select 2006-2024 vehicles from Ford, Chevrolet, GMC with Factory Amplified System

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Install a New Car Stereo and Match Signal Level in select 2006-2024 vehicles from Ford, Chevrolet, GMC with Factory Amplified System

• Retains factory amplifier when installing new stereo
• Made for vehicles equipped with factory amplifiers
• Provides clean power and reduced noise
• Plug and play, easy installation

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Fits your Sierra 3500 HD
List price $23.99
-17% $19.99

In stock

• Retains factory amplifier when installing new stereo
• Made for vehicles equipped with factory amplifiers
• Provides clean power and reduced noise
• Plug and play, easy installation

PAC RadioPro RP5-GM32

Radio Replacement Interface For select 2012-2014 vehicles from GMC, Chevrolet, OnStar Retention, Steering Wheel Control Retention and Navigation Output

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Radio Replacement Interface For select 2012-2014 vehicles from GMC, Chevrolet, OnStar Retention, Steering Wheel Control Retention and Navigation Output

• Provides 12-Volt accessory power (RAP)
• Designed for non-amplified and amplified models
• Retains the Bluetooth
• Micro-B USB Updatable

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found car based on your search
Fits your Sierra 3500 HD
List price $459.00
-58% $192.99

In stock

• Provides 12-Volt accessory power (RAP)
• Designed for non-amplified and amplified models
• Retains the Bluetooth
• Micro-B USB Updatable

Crux SOOGM-16V Wiring Interface

Install new car stereo and retains steering wheel audio controls and other factory features in select 2006-2017 vehicles from Chevrolet, GMC, Buick

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Install new car stereo and retains steering wheel audio controls and other factory features in select 2006-2017 vehicles from Chevrolet, GMC, Buick

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

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found car based on your search
Fits your Sierra 3500 HD
List price $233.10
-36% $149.85

In stock.

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

iDataLink Maestro HRN-SR-GM5 Wiring Harness

Install a New Car Stereo in select 2006-2024 vehicles from Chevrolet, GMC, Cadillac (Requires ADS-MSR Module)

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Install a New Car Stereo in select 2006-2024 vehicles from Chevrolet, GMC, Cadillac (Requires ADS-MSR Module)

• Fits select 2006-2024 vehicles from Chevrolet, GMC, Cadillac
• Designed for use with iDataLink ADS-MSR module (Sold separately)
• Retains select factory features
• Provides needed analogue power outputs for installation

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Fits select models only.
Add details to confirm fitment.
List price $89.99
-28% $64.99

In stock

• Fits select 2006-2024 vehicles from Chevrolet, GMC, Cadillac
• Designed for use with iDataLink ADS-MSR module (Sold separately)
• Retains select factory features
• Provides needed analogue power outputs for installation

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    FAQ for Aftermarket Stereo Installation Accessories in 2012 Sierra 3500 HD

    Q: Can I upgrade or change the Aftermarket Stereo Installation Accessories in 2012 GMC Sierra 3500 HD?

    A: Yes this page includes all the best Aftermarket Stereo Installation Accessories that work in your Sierra 3500 HD.

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