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2018 GMC Sierra 2500 HD

Easily improve your factory OEM stereo's sound system

Better sound with a factory radio for 2018 GMC Sierra 2500 HD

Some factory stereos do not make it easy to be replaced, but you can still add an amp or sub via an integration harness to improve your sound. Additionally, we have custom speaker solutions to make upgrading your sound easy! Lastly, we also have add-ons to upgrade your factory display to get integrate features from a smartphone (via Apple CarPlay or Android Auto) or a backup camera.

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Kicker KGMDL7T12 (51KGMDL7T122)

1200W RMS Loaded Dual 12" Sealed Truck Enclosure for select 2008-2021 Silverado 1500 / 2500 HD / 3500 HD / 1500 LD and Sierra 3500 HD / 1500 / 1500 Denali / 2500 HD and Sierra Denali

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1200W RMS Loaded Dual 12" Sealed Truck Enclosure for select 2008-2021 Silverado 1500 / 2500 HD / 3500 HD / 1500 LD and Sierra 3500 HD / 1500 / 1500 Denali / 2500 HD and Sierra Denali

• Sealed enclosure with 2 12" Solo-Baric L7T Series Subwoofer
• Compatible with select 2008-2021 Silverado 1500 / 2500 HD / 3500 HD / 1500 LD and Sierra 3500 HD / 1500 / 1500 Denali / 2500 HD and Sierra Denali
• 1200 watts RMS
• Final Impedance: 2-ohm
• Dimensions: 15-1/2" L x 7-7/16" H x 52" W

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List price $1049.99
-10% $949.99

In stock

Directed THGMNk5 Wiring Harness

T-Harness Smart Key for select 2009-2025 vehicles from Chevrolet, GMC, Cadillac

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T-Harness Smart Key for select 2009-2025 vehicles from Chevrolet, GMC, Cadillac

• T-Harness Smart Key for select 2009-2025 vehicles from Chevrolet, GMC, Cadillac
• Completely plug and play
• Compatible for DS4 and DS4 plus

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Fits your Sierra 2500 HD
List price $129.99
-46% $69.99

Available

Ships in 10-14 days

• T-Harness Smart Key for select 2009-2025 vehicles from Chevrolet, GMC, Cadillac
• Completely plug and play
• Compatible for DS4 and DS4 plus

JL Audio Stealthbox® SB-GM-3GSLVCNSL/10TW1

Custom fit subwoofer enclosure for select 2014-2018 Sierra 3500 HD / 1500 / 2500 HD and Silverado 2500 HD / 3500 HD / 1500 Front Bucket Seats and OEM Console

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Custom fit subwoofer enclosure for select 2014-2018 Sierra 3500 HD / 1500 / 2500 HD and Silverado 2500 HD / 3500 HD / 1500 Front Bucket Seats and OEM Console

• Loaded Vehicle Specific Stealthbox Subwoofer Enclosure with Single JL Audio 10TW1-2
• 300 Watts RMS Power Handling
• Stealthbox Installs Under Center Console

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$1,199.99

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Only 2 Left!

Used from: $1,019.99

Alpine S2-DB8V-TRK

600W Peak (300W RMS) Loaded Dual 8" Vented Enclosure for select 2007-2024 vehicles from Jeep, GMC, Ford

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600W Peak (300W RMS) Loaded Dual 8" Vented Enclosure for select 2007-2024 vehicles from Jeep, GMC, Ford

• Ported enclosure with 2 8" S Series Subwoofer
• 300 watts RMS (600 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 40-51" L x 8.75" H x 13.75" W

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List price $1020.00
-17% $849.95

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Only 2 Left!

Kicker KGMDL7T12 (51KGMDL7T122) + NVX NDA15001 w/ Free Amp Install Kit

1200W RMS Loaded Dual 12" Sealed Truck Enclosure, 1500W RMS Monoblock Amp, 4 Gauge Wiring Kit, and Can Insulator Koozies Bundle

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1200W RMS Loaded Dual 12" Sealed Truck Enclosure, 1500W RMS Monoblock Amp, 4 Gauge Wiring Kit, and Can Insulator Koozies Bundle

  • Kicker 1200W RMS Loaded Dual 12 Inch Sealed Truck Enclosure
  • NDA15001 3000W Peak Class D N-Series Monoblock Amplifier with Bass Remote
  • Full Spec 4 Gauge 100% OFC Copper Complete Amplifier Wiring Kit with RCA
  • Premium Polyurethane Foam Can Insulator Sleeve Koozie with Logo
  • Bundle includes additional Can Insulator Sleeve Koozie
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137
List price $1498.94
-23% $1,150.02

In stock

  • Kicker 1200W RMS Loaded Dual 12 Inch Sealed Truck Enclosure
  • NDA15001 3000W Peak Class D N-Series Monoblock Amplifier with Bass Remote
  • Full Spec 4 Gauge 100% OFC Copper Complete Amplifier Wiring Kit with RCA
  • Premium Polyurethane Foam Can Insulator Sleeve Koozie with Logo
  • Bundle includes additional Can Insulator Sleeve Koozie

NVX BOOST Box - 2014-2018 Chevrolet Silverado, GMC Sierra - LVE-GM-SLVDCG3-D12S

For select 2014-2018 Sierra 1500 / 2500 HD / 3500 HD and Silverado 3500 HD / 1500 / 2500 HD Double Cab - Dual 12" 800W RMS Loaded Up Firing BOOST Sealed Truck Enclosure

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For select 2014-2018 Sierra 1500 / 2500 HD / 3500 HD and Silverado 3500 HD / 1500 / 2500 HD Double Cab - Dual 12" 800W RMS Loaded Up Firing BOOST Sealed Truck Enclosure

• Custom-Fit BOOST Sealed truck enclosure with 2 12" S Series Subwoofers
• Compatible with select 2014-2018 Sierra 1500 / 2500 HD / 3500 HD and Silverado 3500 HD / 1500 / 2500 HD
• 400 watts RMS (800 watts Peak)
• Final Impedance: 1-ohm

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List price $443.99
-19% $359.99

In stock

Only 2 Left!

iDataLink Maestro HRN-HRR-GM3 Wiring Harness

Install a New Car Stereo and Retain Steering Wheel Controls and Other Factory Features in select 2014-2020 vehicles from Chevrolet, GMC

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Install a New Car Stereo and Retain Steering Wheel Controls and Other Factory Features in select 2014-2020 vehicles from Chevrolet, GMC

• Stereo replacement harness for select 2014-2020 vehicles from Chevrolet, GMC
• Designed for use with Maestro RR or RR2 modules
• Retains use of steering wheel controls and factory amplifier
• Retains warning chimes, OnStar with Bluetooth

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1
List price $123.99
-19% $99.99

In stock

• Stereo replacement harness for select 2014-2020 vehicles from Chevrolet, GMC
• Designed for use with Maestro RR or RR2 modules
• Retains use of steering wheel controls and factory amplifier
• Retains warning chimes, OnStar with Bluetooth

NVX BOOST Box - 2014-2018 Chevrolet Silverado, GMC Sierra - LVE-GM-SLVCCG3-D10S

For select 2014-2018 Silverado 2500 HD / 1500 / 3500 HD and Sierra 2500 HD / 1500 / 3500 HD Crew Cab - Dual 10" 700W RMS Loaded Down Firing BOOST Sealed Truck Enclosure

LVE-GM-SLVCCG3-D10S big
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For select 2014-2018 Silverado 2500 HD / 1500 / 3500 HD and Sierra 2500 HD / 1500 / 3500 HD Crew Cab - Dual 10" 700W RMS Loaded Down Firing BOOST Sealed Truck Enclosure

• Custom-Fit BOOST Sealed truck enclosure with 2 10" S Series Subwoofers
• Compatible with select 2014-2018 Silverado 2500 HD / 1500 / 3500 HD and Sierra 2500 HD / 1500 / 3500 HD
• 350 watts RMS (700 watts Peak)
• Final Impedance: 1-ohm

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List price $431.99
-17% $359.99

In stock

Only 2 Left!

NVX BOOST Box - 2014-2018 Chevrolet Silverado, GMC Sierra - LVE-GM-SLVDCG3-D10S

For select 2014-2018 Sierra 1500 / 2500 HD / 3500 HD and Silverado 1500 / 2500 HD / 3500 HD Double Cab - Dual 10" 700W RMS Loaded Up Firing BOOST Sealed Truck Enclosure

LVE-GM-SLVDCG3-D10S big
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For select 2014-2018 Sierra 1500 / 2500 HD / 3500 HD and Silverado 1500 / 2500 HD / 3500 HD Double Cab - Dual 10" 700W RMS Loaded Up Firing BOOST Sealed Truck Enclosure

• Custom-Fit BOOST Sealed truck enclosure with 2 10" S Series Subwoofers
• Compatible with select 2014-2018 Sierra 1500 / 2500 HD / 3500 HD and Silverado 1500 / 2500 HD / 3500 HD
• 350 watts RMS (700 watts Peak)
• Final Impedance: 1-ohm

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List price $419.99
-19% $339.99

In stock

Only 3 Left!

NVX BOOST Box - 2014-2018 Chevrolet Silverado, GMC Sierra - LVE-GM-SLVCCG3-D12S

For select 2014-2018 Sierra 3500 HD / 1500 / 2500 HD and Silverado 1500 / 2500 HD / 3500 HD Crew Cab - Dual 12" 800W RMS Loaded Down Firing BOOST Sealed Truck Enclosure

LVE-GM-SLVCCG3-D12S big
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For select 2014-2018 Sierra 3500 HD / 1500 / 2500 HD and Silverado 1500 / 2500 HD / 3500 HD Crew Cab - Dual 12" 800W RMS Loaded Down Firing BOOST Sealed Truck Enclosure

• Custom-Fit BOOST Sealed truck enclosure with 2 12" S Series Subwoofers
• Compatible with select 2014-2018 Sierra 3500 HD / 1500 / 2500 HD and Silverado 1500 / 2500 HD / 3500 HD
• 400 watts RMS (800 watts Peak)
• Final Impedance: 1-ohm

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List price $455.99
-17% $379.99

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Only 3 Left!

Axxess AXRSCH-GMLN10

Install a New Car Stereo and Retain Steering Wheel Audio Controls and Backup Camera and Other Factory Features in select 2014-2020 vehicles from Chevrolet, GMC

AXRSCH-GMLN10 big
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Install a New Car Stereo and Retain Steering Wheel Audio Controls and Backup Camera and Other Factory Features in select 2014-2020 vehicles from Chevrolet, GMC

• Direct connection to the factory harness
• Compatible with select 2014-2020 vehicles from Chevrolet, GMC
• Designed for non-amplified vehicles and select aftermarket stereos
• Retain R.A.P., backup camera, SWC audio controls, safety chimes
• Provides accessory power and NAV outputs
• No major cutting or splicing required

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Fits your Sierra 2500 HD
List price $77.99
-10% $69.99

In stock

Only 1 Left!

• Direct connection to the factory harness
• Compatible with select 2014-2020 vehicles from Chevrolet, GMC
• Designed for non-amplified vehicles and select aftermarket stereos
• Retain R.A.P., backup camera, SWC audio controls, safety chimes
• Provides accessory power and NAV outputs
• No major cutting or splicing required

Axxess AXRSCH-GMLN9

Install a New Car Stereo and Retain Steering Wheel Audio Controls and Backup Camera and Other Factory Features in select 2014-2020 vehicles from Chevrolet, GMC

AXRSCH-GMLN9 big
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Install a New Car Stereo and Retain Steering Wheel Audio Controls and Backup Camera and Other Factory Features in select 2014-2020 vehicles from Chevrolet, GMC

• Direct connection to the factory harness
• Compatible with select 2014-2020 vehicles from Chevrolet, GMC
• Designed for non-amplified vehicles and select aftermarket stereos
• Retain R.A.P., backup camera, SWC audio controls, safety chimes
• Provides accessory power and NAV outputs
• No major cutting or splicing required

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your Sierra 2500 HD
List price $77.99
-10% $69.99

In stock

Only 1 Left!

• Direct connection to the factory harness
• Compatible with select 2014-2020 vehicles from Chevrolet, GMC
• Designed for non-amplified vehicles and select aftermarket stereos
• Retain R.A.P., backup camera, SWC audio controls, safety chimes
• Provides accessory power and NAV outputs
• No major cutting or splicing required

JL Audio Stealthbox® SB-GM-SLVD/10TW1/BK

Custom-Fit Loaded Dual 10" Sealed Truck Enclosure with Two 10TW1-4 Subwoofers for select 2014-2018 Sierra 2500 HD / 1500 / 3500 HD and Silverado 3500 HD / 2500 HD / 1500 (Black)

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Custom-Fit Loaded Dual 10" Sealed Truck Enclosure with Two 10TW1-4 Subwoofers for select 2014-2018 Sierra 2500 HD / 1500 / 3500 HD and Silverado 3500 HD / 2500 HD / 1500 (Black)

• Sealed truck enclosure with 2 10" TW1 Series Subwoofer
• Designed for select 2014-2018 Sierra 2500 HD / 1500 / 3500 HD and Silverado 3500 HD / 2500 HD / 1500
• 600 watts per pair / 300 watts each RMS
• Final Impedance: 2-ohm
• Includes two JL Audio 10TW1-4 subwoofers
• Easily installs under the rear seat
• Includes two black steel mesh grilles

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$1,799.99

In stock

Only 1 Left!

Used from: $1,529.99

iDataLink Maestro HRN-SR-GM3 Wiring Harness

Install a New Car Stereo in select 2014-2020 vehicles from GMC, Chevrolet (Maestro SR Required)

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Install a New Car Stereo in select 2014-2020 vehicles from GMC, Chevrolet (Maestro SR Required)

• Stereo replacement T-harness for select 2014-2020 vehicles from GMC, Chevrolet
• Compatible for amplified and non-amplified systems
• Required to use with Maestro SR module
• Retains steering wheel control
• Simplified installation, no cutting required

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Fits select models only.
Add details to confirm fitment.
List price $99.99
-35% $64.99

In stock

• Stereo replacement T-harness for select 2014-2020 vehicles from GMC, Chevrolet
• Compatible for amplified and non-amplified systems
• Required to use with Maestro SR module
• Retains steering wheel control
• Simplified installation, no cutting required

iDataLink Maestro HRN-HRR-GM4 Wiring Harness

Install a New Car Stereo in select 2016-2019 vehicles from GMC, Chevrolet (Maestro RR Required)

HRN-HRR-GM4 big
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Install a New Car Stereo in select 2016-2019 vehicles from GMC, Chevrolet (Maestro RR Required)

• Stereo replacement T-harness for select 2016-2019 vehicles from GMC, Chevrolet
• For use with Maestro RR module
• Retains select factory features
• Plug n play connection, no cutting required

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found car based on your search
Fits your Sierra 2500 HD
List price $83.99
-17% $69.99

In stock

• Stereo replacement T-harness for select 2016-2019 vehicles from GMC, Chevrolet
• For use with Maestro RR module
• Retains select factory features
• Plug n play connection, no cutting required

AudioControl TXGM14D10

1200W RMS Loaded Dual 10" Sealed Truck Enclosure for select 2014-2019 Sierra 3500 HD / 1500 / 2500 HD and Silverado 3500 HD / 2500 HD / 1500

TXGM14D10 big
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1200W RMS Loaded Dual 10" Sealed Truck Enclosure for select 2014-2019 Sierra 3500 HD / 1500 / 2500 HD and Silverado 3500 HD / 2500 HD / 1500

• Sealed truck enclosure with 2 10" Spike Series Subwoofer
• 1200 watts RMS
• Final Impedance: 4-ohm
• Compatible with select 2014-2019 Sierra 3500 HD / 1500 / 2500 HD and Silverado 3500 HD / 2500 HD / 1500
• Dimensions: 51.18" L x 7.14" H x 13.55" W

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List price $1299.00
-8% $1,199.00

Available

Ships in 10-14 days

iDataLink Maestro HRN-SR-GM4 Wiring Harness

Install a New Car Stereo in select 2016-2019 vehicles from Chevrolet, GMC (Maestro SR Required)

HRN-SR-GM4 big
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Install a New Car Stereo in select 2016-2019 vehicles from Chevrolet, GMC (Maestro SR Required)

• Stereo replacement T-harness for select 2016-2019 vehicles from Chevrolet, GMC
• Required to use with Maestro SR module
• Retains steering wheel control and factory amplifier
• Simplified installation, no cutting required

shipping truck icon Free shipping in USA. Provide zip for delivery date.
Fits select models only.
Add details to confirm fitment.
List price $67.99
-34% $44.99

Available

Ships in 10-14 days

• Stereo replacement T-harness for select 2016-2019 vehicles from Chevrolet, GMC
• Required to use with Maestro SR module
• Retains steering wheel control and factory amplifier
• Simplified installation, no cutting required

NVX Complete N-Series Speaker Upgrade Kit for 14-19 Chevy Silverado 2500/3500HD

Pair of 6x9" & 6.5" NVX N-Series Speaker Upgrade Kit with Metra Speaker Adapters and Harnesses | Fits select 2015-2019 Sierra 2500 HD / 3500 HD and Silverado 3500 HD / 2500 HD

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Pair of 6x9" & 6.5" NVX N-Series Speaker Upgrade Kit with Metra Speaker Adapters and Harnesses | Fits select 2015-2019 Sierra 2500 HD / 3500 HD and Silverado 3500 HD / 2500 HD

• NVX 6x9" Coaxial Speakers
• NVX 6.5" Coaxial Speakers
• Metra Speaker Adapters and Harnesses
• Plug-n-play Installation

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229
List price $313.94
-29% $223.94

In stock

• NVX 6x9" Coaxial Speakers
• NVX 6.5" Coaxial Speakers
• Metra Speaker Adapters and Harnesses
• Plug-n-play Installation

NVX Complete N-Series Speaker Upgrade Kit for 15-19 GMC Sierra Crew Cab

Pair of 6x9" & 6.5" NVX N-Series Speaker Upgrade Kit with Metra Speaker Adapters and Harnesses | Fits select 2015-2019 Sierra 2500 HD

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Pair of 6x9" & 6.5" NVX N-Series Speaker Upgrade Kit with Metra Speaker Adapters and Harnesses | Fits select 2015-2019 Sierra 2500 HD

• NVX 6" x 9" Coaxial Speakers
• NVX 6.5" Coaxial Speakers
• Metra Speaker Harnesses and Adapter
• Plug-n-play Installation

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Fits select locations in your Sierra 2500 HD.
Add vehicle details to confirm exact location.
229
List price $313.94
-33% $209.94

In stock

• NVX 6" x 9" Coaxial Speakers
• NVX 6.5" Coaxial Speakers
• Metra Speaker Harnesses and Adapter
• Plug-n-play Installation

NVX Complete N-Series Speaker Upgrade for 15-19 GMC Sierra 2500HD/3500HD Ext Cab

Pair of 6x9" & 6.5" NVX N-Series Speaker Upgrade Kit with Metra Speaker Adapters and Harnesses | Fits select 2015-2019 Sierra 3500 HD / 2500 HD

15-19-gmc-s25h35hec-spkg big
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Pair of 6x9" & 6.5" NVX N-Series Speaker Upgrade Kit with Metra Speaker Adapters and Harnesses | Fits select 2015-2019 Sierra 3500 HD / 2500 HD

• NVX 6" x 9" Coaxial Speakers
• NVX 6.5" Coaxial Speakers
• Metra Speaker Harnesses and Adapter
• Plug-n-play Installation

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additional information required
Fits select locations in your Sierra 2500 HD.
Add vehicle details to confirm exact location.
206
List price $279.95
-33% $187.99

In stock

• NVX 6" x 9" Coaxial Speakers
• NVX 6.5" Coaxial Speakers
• Metra Speaker Harnesses and Adapter
• Plug-n-play Installation

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    FAQ for Better sound with a factory radio in 2018 Sierra 2500 HD

    Q: Can I upgrade or change the Better sound with a factory radio in 2018 GMC Sierra 2500 HD?

    A: Yes this page includes all the best Better sound with a factory radio that work in your Sierra 2500 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
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    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.