AXTC-CL2
I N S TA L L A T I O N   I N S T R U C T I O N S
AxxessInterfaces.com  © COPYRIGHT 2023 METRA ELECTRONICS CORPORATION  REV. 4/5/23 INSTAXTC-CL2
INTERFACE FEATURES
INTERFACE COMPONENTS
TOOLS & INSTALLATION ACCESSORIES REQUIRED
• Crimping tool and connectors, or solder gun, 
  solder, and heat shrink 
• Tape 
• Wire cutter
• Zip ties
TABLE OF CONTENTS
Applications 2 ...........................................................
Connections 3 ............................................................
Programming 4-5 ..........................................................
Troubleshooting.....................................................6
GM Data Interface with SWC 2000-2013
APPLICATIONS
See inside front cover
•  Provides retained accessory 
power (10-amp)
•  Provides illumination, parking 
brake, reverse, and speed 
sense outputs
•  Retains warning chimes 
through an onboard speaker
•  Retains audio controls on the 
steering wheel
•  Designed to be compatible 
with all major radio brands
•  Auto detects vehicle type, radio 
connection, and preset controls
•  Ability to dual assign steering 
wheel control buttons
•  Retains memory settings even 
after battery disconnection or 
interface removal (nonvolatile 
memory)
•  Designed for non-amplified 
models, or when bypassing a 
factory amplifier
•  Retains balance and fade
•  Micro-B USB updatable
• AXTC-CL2 interface
• AXTC-CL2 harness
• 3.5mm adapter
ATTENTION: With the key out of the ignition, 
disconnect the negative battery terminal 
before installing this product. Ensure that all 
installation connections, especially the air 
bag indicator lights, are plugged in before 
reconnecting the battery or cycling the ignition 
to test this product.
NOTE: Refer also to the instructions included 
with the aftermarket accessory before 
installing this device.
Product Info
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about the product and up-to-date vehicle specific applications.