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Axxess AX-ADGM03

ADBOX Aftermarket Stereo Installation Harness for Select 2000-Up GM Vehicles

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Vehicle Specific Installation Harness

Axxess continues to make installing and integrating an aftermarket receiver easier than ever. The Axxess AX-ADGM03 vehicle specific installation harness for select 2000-UP GM vehicles plugs directly to your vehicle's harness and the Axxess ADBOX interface. The only splicing of wires will between the new receiver and this harness. The AX-ADGM03 must be used in conjunction with the Axxess AX-ADBOX1 and AX-ADBOX2 to work and retain factory features such as Onstar, OE Bluetooth, etc.

Product Features:

  • Axxess ADBOX Aftermarket Stereo Installation Harness for select 2000-UP GM Vehicles
  • Harness is used when installing an aftermarket stereo
  • Connects the aftermarket stereo harness to the vehicles factory harness
  • Plugs into the factory harness without cutting any wires
  • Standard color coded wires provide a consistent and simplified installation
  • Made from OEM quality materials
  • **Designed specifically to work with the Axxess AX-ADBOX1 and Axxess AX-ADBOX2 (required and sold separately)
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Axxess AX-ADBOX1

Compatibility Notes:

ADBOX vehicle specific harnesses are designed to work exclusively with the Axxess AX-ADBOX1 and Axxess AX-ADBOX2. Make sure you choose the correct ADBOX harness and interface before checking out. If you have any questions please give us a call for further assistance.

Compatibility List:

  • Buick
    • 2005-09 Allure
    • 2004-05 Century
    • 2005-11 Lacrosse
    • 2004-07 Rainier
    • 2002-07 Rendezvous
    • 2005-08 Terraza
  • Cadillac
    • 2003-06 Escalade
    • 2003-06 Escalade EXT
  • Chevrolet
    • 2003-06 Avalanche
    • 2000-05 Cavalier
    • 2005-Up Corvette
    • 2000-03 Express
    • 2000-05 Impala
    • 2003-04 Malibu
    • 2004     Malibu Classic
    • 2000-05 Monte Carlo
    • 2003-06 Silverado
    • 2007     Silverado Classic
    • 2003-06 SSR
    • 2003-06 Suburban
    • 2003-06 Tahoe
    • 2002-09 Trailblazer
    • 2005-08 Uplander
  • GMC
    • 2007-09 Envoy
    • 2003-07 Savanna
    • 2003-06 Sierra
    • 2007     Sierra Classic
    • 2003-06 Yukon XL/Denali
  • Hummer
    • 2003-07 H2
    • 2006-09 H3
  • Isuzu
    • 2003-08 Ascender
    • 2006-08 I-Series
  • Oldsmobile
    • 2001-04 Alero
    • 2002-04 Bravada
    • 2002     Intrigue
    • 2000-2004 Silhouette
  • Pontiac
    • 2001-05 Aztec
    • 2001-05 Grand Am
    • 2004-08 Grand Prix
    • 2000-05 Sunfire

Harness Features

Main Harness Function
Different installations on different vehicles require different harnesses. This type is what the harness is considered. Each wiring harness we sell serves a purpose such as installing an aftermarket car stereo, integrating an aftermarket amplifier with your factory car stereo, connecting Bluetooth to your factory car stereo, and more.
Connect/Install an Aftermarket Car Stereo
Compatible Vehicle Make
Allows you to view only items that are compatible with your vehicle's make. Does not guarantee that it will work with your vehicle year or model.
Compatible Vehicle Make and Model
The model of vehicle that this vehicle specific product is designed for. Please keep in mind that engine variations can affect the compatibility of the products.
Buick Enclave
Buick Lucerne
Cadillac Escalade
Cadillac SRX
Chevy Avalanche
Chevy Equinox
Chevy Express Van
Chevy Impala
Chevy Monte Carlo
Chevy Silverado
Chevy Suburban
Chevy Tahoe
Chevy Traverse
GMC Acadia
GMC Savana
GMC Sierra
GMC Yukon
Hummer H2
Pontiac Torrent
Saturn Outlook
Saturn Vue
Suzuki XL-7

Premium Harness Features

GM-LAN Compatible
This means that the item is compatible with GM-LAN systems.

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating



door buster prices

April 4, 2014

had the correct harness and delivered on time. ill be back

12 of 16 found this helpful

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Bastrop, Texas


August 3, 2016

Worked for my 08 GMC Envoy, took time to figure out which wire is which but once I figured that out it was easy.

0 of 0 found this helpful

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Browse 2 questions and 7 answers
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Why did you choose this?
Sonic Electronix Store
Wasn't able to find it elsewhere.
another mans j on Jun 14, 2016
It's what I need for the speakers I just ordered and it's a reasonable price
William H on Sep 23, 2015
It was the only one that fits my factory harness.
Derrick G on Nov 11, 2015
Can't find what I need anywhere hope this works and has wiring diagram.
Jason C on Jul 10, 2015
im looking to install an aftermarket radio into my impala and need to know what items I will need in order to do so as I am looking right now it appears maybe the metra 70-2021 and the ax-adgm03 is what I need ???
A shopper on May 24, 2016
Axxess AX-ADGM03
Axxess AX-ADGM03
Metra 70-2021
Metra 70-2021
Best Answer: Hello,

Unfortunately, no. Although on the right track, the first part cannot be used with the second, and the second (as specified in the description) need Another part to work right. You likely seek a GMOS piece, but you did not provide enough information to know that for sure. Use the link below to help and/or CALL our sales team.
Reply · Report · Rick MStaff on May 24, 2016
· Add Answer · I Have This Question Too (0)

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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Axxess AX-ADGM03