Garage
Shop
Loading...
Filters

We are sorry, no available results!

filter-icon Filters & Sort

XpressKit PLJX

GM Self Learning Passlock Override

PLJX big
Go to item page Right Arrow Icon of Right Arrow

GM Self Learning Passlock Override

• GM Self Learning Passlock Override
• GM Passlock 1, 2, Vats, and Ion Self Learning Digital Interface Jumper Selection

shipping truck icon
FREE 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2003 Blazer
24
Was $52.99 Details
$49.99

In stock

• GM Self Learning Passlock Override
• GM Passlock 1, 2, Vats, and Ion Self Learning Digital Interface Jumper Selection

PLJX small

Item added to your cart.

Price: $49.99

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7

Scosche MDA1B Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1958-2023 vehicles from GMC, Chevrolet, Pontiac

MDA1B big
Go to item page Right Arrow Icon of Right Arrow

Connect your factory antenna to a new aftermarket radio for select 1958-2023 vehicles from GMC, Chevrolet, Pontiac

• GM / Chevrolet Antenna Adapter
• Aftermarket Antenna Male (Motorola Plug) to Factory Radio Female (Proprietary Plug)
• select 1958-2023 vehicles from GMC, Chevrolet, Pontiac Vehicles

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

349
Was $8.95 Details
$5.99

In stock

• GM / Chevrolet Antenna Adapter
• Aftermarket Antenna Male (Motorola Plug) to Factory Radio Female (Proprietary Plug)
• select 1958-2023 vehicles from GMC, Chevrolet, Pontiac Vehicles

Metra 40-EU55 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1998-2024 vehicles from BMW, Chevrolet, GMC

40-EU55 big
Go to item page Right Arrow Icon of Right Arrow

Connect your factory antenna to a new aftermarket radio for select 1998-2024 vehicles from BMW, Chevrolet, GMC

• Antenna Adapter Cable
• Compatible with select 1998-2024 vehicles from BMW, Chevrolet, GMC Vehicles
• Powered antenna and newer "FACRA" style connector to aftermarket radio

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2003 Blazer
30
Was $27.99 Details
$13.99

In stock

• Antenna Adapter Cable
• Compatible with select 1998-2024 vehicles from BMW, Chevrolet, GMC Vehicles
• Powered antenna and newer "FACRA" style connector to aftermarket radio

Mean Green Alternators MG8247

High Output Alternator for select 1996-2007 vehicles from Chevrolet, GMC, Hummer

MG8247 big
Go to item page Right Arrow Icon of Right Arrow

High Output Alternator for select 1996-2007 vehicles from Chevrolet, GMC, Hummer

• Easy 5-minute installation
• Compatible with select 1996-2007 vehicles from Chevrolet, GMC, Hummer Vehicles
• Up to 300% more charging power
• Precision balanced for smooth operation
• Superior Design
• Will help make your ride perform at its best

shipping truck icon
FREE shipping to VA. Delivers Apr. 6 - Apr. 10

empty

found car based on your search
This product fits your 2003 Blazer
$519.99

In stock.

• Easy 5-minute installation
• Compatible with select 1996-2007 vehicles from Chevrolet, GMC, Hummer Vehicles
• Up to 300% more charging power
• Precision balanced for smooth operation
• Superior Design
• Will help make your ride perform at its best

MG8247 small

Item added to your cart.

Price: $519.99

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7
Essential add-ons
Perfect Match Big 3 Kit

Get the right Big 3 Kit to go with your High Output Alternator

$114.99

$99.99

Add to cart

Scosche MDAB Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1958-2023 vehicles from GMC, Chevrolet, Pontiac

MDAB big
Go to item page Right Arrow Icon of Right Arrow

Connect your factory antenna to a new aftermarket radio for select 1958-2023 vehicles from GMC, Chevrolet, Pontiac

• Connects aftermarket stereo to factory antenna
• select 1958-2023 vehicles from GMC, Chevrolet, Pontiac Vehicles
• Ensures optimal signal quality

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

18
Was $8.95 Details
$6.99

In stock

• Connects aftermarket stereo to factory antenna
• select 1958-2023 vehicles from GMC, Chevrolet, Pontiac Vehicles
• Ensures optimal signal quality

Metra 99-2011 Dash Kit

Install a new Single-DIN or Double-DIN car stereo in select 1989-2023 vehicles from GMC, Chevrolet, Buick

99-2011 big
Go to item page Right Arrow Icon of Right Arrow

Install a new Single-DIN or Double-DIN car stereo in select 1989-2023 vehicles from GMC, Chevrolet, Buick

• Single-DIN or Double-DIN Dash Kit
• High-Grade ABS plastic construction
• Original factory-like fit and finish
• Includes installation instructions

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2003 Blazer
12
Was $24.99 Details
$12.99

In stock

• Single-DIN or Double-DIN Dash Kit
• High-Grade ABS plastic construction
• Original factory-like fit and finish
• Includes installation instructions

99-2011 small

Item added to your cart.

Price: $12.99

Essential add-ons
Belva BTK105

5 Piece Installer's Removal Tool Kit

$18.99

$11.99

Add to cart

Metra 40-GM10 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1958-2023 vehicles from GMC, Chevrolet, Pontiac

40-GM10 big
Go to item page Right Arrow Icon of Right Arrow

Connect your factory antenna to a new aftermarket radio for select 1958-2023 vehicles from GMC, Chevrolet, Pontiac

• Factory Antenna to Aftermarket Radio Adapter
• select 1958-2023 vehicles from GMC, Chevrolet, Pontiac Vehicles
• GM factory antenna with mini "barbless" or "barbed" plug to aftermarket radio

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

22
Was $19.99 Details
$8.99

In stock

• Factory Antenna to Aftermarket Radio Adapter
• select 1958-2023 vehicles from GMC, Chevrolet, Pontiac Vehicles
• GM factory antenna with mini "barbless" or "barbed" plug to aftermarket radio

Scosche GM1590DDB / GM1590AB Dash Kit

Install a new Double-DIN car stereo in select 1994-2023 vehicles from GMC, Chevrolet, Buick (Black)

GM1590DDB big
Go to item page Right Arrow Icon of Right Arrow

Install a new Double-DIN car stereo in select 1994-2023 vehicles from GMC, Chevrolet, Buick (Black)

• Double-DIN Dash Kit
• Painted scratch-resistant black
• High-Grade ABS plastic construction
• Original factory-like fit and finish
• Includes installation instructions

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2003 Blazer
50
$10.95

In stock

• Double-DIN Dash Kit
• Painted scratch-resistant black
• High-Grade ABS plastic construction
• Original factory-like fit and finish
• Includes installation instructions

GM1590DDB small

Item added to your cart.

Price: $10.95

Essential add-ons
Belva BTK105

5 Piece Installer's Removal Tool Kit

$18.99

$11.99

Add to cart

Scosche GM05B Wiring Harness

Install a new car stereo in select 1998-2008 vehicles from Chevrolet, GMC, Kia

GM05B big
Go to item page Right Arrow Icon of Right Arrow

Install a new car stereo in select 1998-2008 vehicles from Chevrolet, GMC, Kia

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

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2003 Blazer
22
Was $9.95 Details
$6.95

In stock

Only 1 Left!

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

Metra 70-2003 Wiring Harness

Install a new car stereo in select 1998-2008 vehicles from Chevrolet, GMC, Kia

70-2003 big
Go to item page Right Arrow Icon of Right Arrow

Install a new car stereo in select 1998-2008 vehicles from Chevrolet, GMC, Kia

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

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2003 Blazer
28
Was $19.99 Details
$6.99

In stock

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

Raptor AD-GM1 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1958-2023 vehicles from GMC, Chevrolet, Pontiac

AD-GM1 big
Go to item page Right Arrow Icon of Right Arrow

Connect your factory antenna to a new aftermarket radio for select 1958-2023 vehicles from GMC, Chevrolet, Pontiac

• Factory Antenna to Aftermarket Radio Adapter
• select 1958-2023 vehicles from GMC, Chevrolet, Pontiac Vehicles
• GM factory antenna with mini "barbless" or "barbed" plug to aftermarket radio

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

2
Was $16.99 Details
$8.99

In stock

• Factory Antenna to Aftermarket Radio Adapter
• select 1958-2023 vehicles from GMC, Chevrolet, Pontiac Vehicles
• GM factory antenna with mini "barbless" or "barbed" plug to aftermarket radio

Metra 40-GM12 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1958-2023 vehicles from GMC, Chevrolet, Pontiac

40-GM12 big
Go to item page Right Arrow Icon of Right Arrow

Connect your factory antenna to a new aftermarket radio for select 1958-2023 vehicles from GMC, Chevrolet, Pontiac

• Factory Antenna to Aftermarket Radio Connector
• select 1958-2023 vehicles from GMC, Chevrolet, Pontiac Vehicles
• GM factory antenna connector/plug to aftermarket radio

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

7
Was $19.99 Details
$6.99

In stock

• Factory Antenna to Aftermarket Radio Connector
• select 1958-2023 vehicles from GMC, Chevrolet, Pontiac Vehicles
• GM factory antenna connector/plug to aftermarket radio

Mean Green Alternators MG8247SHD

375 Amp High Output Alternator for select 1996-2007 vehicles from Chevrolet, GMC, Hummer

MG8247SHD big
Go to item page Right Arrow Icon of Right Arrow

375 Amp High Output Alternator for select 1996-2007 vehicles from Chevrolet, GMC, Hummer

• Precision Balanced for Smooth Operation
• Compatible with select 1996-2007 vehicles from Chevrolet, GMC, Hummer Vehicles
• Easy 5-minute installation
• Up to 300% more power
• Tool-grade steel rotor shaft
• Heavy duty double sealed bearings
• Heat resistant multifunction integrated regulator

shipping truck icon
FREE shipping to VA. Delivers Apr. 6 - Apr. 10

empty

found car based on your search
This product fits your 2003 Blazer
$879.99

In stock.

• Precision Balanced for Smooth Operation
• Compatible with select 1996-2007 vehicles from Chevrolet, GMC, Hummer Vehicles
• Easy 5-minute installation
• Up to 300% more power
• Tool-grade steel rotor shaft
• Heavy duty double sealed bearings
• Heat resistant multifunction integrated regulator

MG8247SHD small

Item added to your cart.

Price: $879.99

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7
Essential add-ons
Perfect Match Big 3 Kit

Get the right Big 3 Kit to go with your High Output Alternator

$114.99

$99.99

Add to cart

Metra 40-EU20 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1998-2024 vehicles from BMW, Chevrolet, Ford

40-EU20 big
Go to item page Right Arrow Icon of Right Arrow

Connect your factory antenna to a new aftermarket radio for select 1998-2024 vehicles from BMW, Chevrolet, Ford

• Radio to Antenna Adapter
• select 1998-2024 vehicles from BMW, Chevrolet, Ford Vehicles
• Factory radio with mini-style plug to universal antenna

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2003 Blazer
Was $29.99 Details
$8.99

In stock

Only 3 Left!

• Radio to Antenna Adapter
• select 1998-2024 vehicles from BMW, Chevrolet, Ford Vehicles
• Factory radio with mini-style plug to universal antenna

Metra 40-GM21 Antenna Adapter

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

40-GM21 big
Go to item page Right Arrow Icon of Right Arrow

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

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

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2003 Blazer
Was $19.99 Details
$5.99

In stock

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

Metra 40-GM20 Antenna Adapter

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

40-GM20 big
Go to item page Right Arrow Icon of Right Arrow

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

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2003 Blazer
Was $19.99 Details
$6.99

In stock

Only 1 Left!

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

Mean Green Alternators MG8247HD

300 Amp High Output Alternator for select 1996-2007 vehicles from Chevrolet, GMC, Hummer

MG8247HD big
Go to item page Right Arrow Icon of Right Arrow

300 Amp High Output Alternator for select 1996-2007 vehicles from Chevrolet, GMC, Hummer

• Easy 5-minute installation
• Compatible with select 1996-2007 vehicles from Chevrolet, GMC, Hummer Vehicles
• Up to 300% more charging power
• Precision balanced for smooth operation
• Steel rotor shaft
• Heavy duty solid copper starter windings
• Multi-function integrated regulator
• High output alternator

shipping truck icon
FREE shipping to VA. Delivers Apr. 6 - Apr. 10

empty

found car based on your search
This product fits your 2003 Blazer
$719.99

In stock.

• Easy 5-minute installation
• Compatible with select 1996-2007 vehicles from Chevrolet, GMC, Hummer Vehicles
• Up to 300% more charging power
• Precision balanced for smooth operation
• Steel rotor shaft
• Heavy duty solid copper starter windings
• Multi-function integrated regulator
• High output alternator

MG8247HD small

Item added to your cart.

Price: $719.99

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7
Essential add-ons
Perfect Match Big 3 Kit

Get the right Big 3 Kit to go with your High Output Alternator

$114.99

$99.99

Add to cart

Metra 40-GM31 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1985-2023 vehicles from GMC, Chevrolet, Pontiac

40-GM31 big
Go to item page Right Arrow Icon of Right Arrow

Connect your factory antenna to a new aftermarket radio for select 1985-2023 vehicles from GMC, Chevrolet, Pontiac

• Barb-less Antenna Adapter Kit
• select 1985-2023 vehicles from GMC, Chevrolet, Pontiac Vehicles
• For the addition of a CD changer or other external devices with built-in FM modulator

shipping truck icon
Fast 3-day shipping to VA. Delivers Apr. 11 - Apr. 18

empty

2
Was $21.99 Details
$9.99

Available

Ships in 10-14 days

• Barb-less Antenna Adapter Kit
• select 1985-2023 vehicles from GMC, Chevrolet, Pontiac Vehicles
• For the addition of a CD changer or other external devices with built-in FM modulator

Metra 71-1858

Reverse Wiring Harness for Select 1988-1994 GM Vehicles

71-1858 big
Go to item page Right Arrow Icon of Right Arrow

Reverse Wiring Harness for Select 1988-1994 GM Vehicles

• Wiring Harness For Select 1988-Up GM Vehicles With 21-Pin OEM Radio
• 21 Pin Plugs Into OEM Radio
• Power/4 Speaker
• Harness Designed To Plug In Factory Radio

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2003 Blazer
2
Was $19.99 Details
$7.99

In stock

• Wiring Harness For Select 1988-Up GM Vehicles With 21-Pin OEM Radio
• 21 Pin Plugs Into OEM Radio
• Power/4 Speaker
• Harness Designed To Plug In Factory Radio

1998-2005 Chevy Blazer - Front Dash Factory Speaker Replacement Package | NVX

Simple plug and play installation, no cutting required

Go to item page Right Arrow Icon of Right Arrow

Simple plug and play installation, no cutting required

• NVX 4x6" Coaxial Speakers
• Metra Speaker Adapters and Harnesses
• Plug-n-play Installation

empty

found car based on your search
This product fits your 2003 Blazer
124
Was $169.97 Details
$123.97

• NVX 4x6" Coaxial Speakers
• Metra Speaker Adapters and Harnesses
• Plug-n-play Installation

98-05-chevy-blazer-fdspkg small

Item added to your cart.

Price: $123.97

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7

Items per page: 20 40 60

    clear all
    why-shoping-with-sonic

    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.
    Shop Deals and get up to 30% off premium brands! Shop Now! We are always looking out for the best products and deals to offer our customers. Don’t pay too much by shopping elsewhere!
    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!
    Why Shop With Us?
    ADVERTISEMENT
    FAQ for your 2003 Blazer

    Q: Can I upgrade the factory stereo system in my 2003 Chevrolet Blazer?

    A: Yes you can improve your sound in your Blazer by upgrading your speakers and/or adding an amplifier. You may also be able to update the stereo and main display in your 2003 Blazer if there is a dash kit and harness solution available.

    Save up to 10 different vehicles in your garage

    2003 Chevrolet Blazer

    Are you sure you want to clear your garage?
    This action cannot be undone. Confirm
    This category was not designed for products.
    If you continue, you will be redirected to a category customized for your vehicle. Continue
    Loading...
    Identify your vehicle and submodel details
    • Owner’s manual
    • Vehicle’s insurance card
    • Vehicle registration
    • Vehicle produced after 2005: Inside driver’s side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
    Car Info Side Door Icon
    Vehicle Registration Icon
    Vehicle Insurance Icon