AXDI-GM3
I N S T A 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. 8/11/23 INSTAXDI-GM3
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.
INTERFACE FEATURES
INTERFACE COMPONENTS
TOOLS & INSTALLATION ACCESSORIES REQUIRED
• Cutting tool • Tape • Crimping tool
• Connectors (i.e. butt-connectors, bell caps, etc.)
TABLE OF CONTENTS
Connections 
  LD-LCGM-O3 DIAGRAM 2 ......................................
Installation 3  .............................................................
Programming 3 .........................................................
Cadillac Chime Interface 1996-2005
• Provides accessory power (12-volt 10-amp)
• Retains R.A.P. (Retained Accessory Power)
• 
Provides NAV outputs (parking brake, reverse, and speed sense)
• Used in non-amplified models, or when bypassing a factory amplifier
• Used in models without OnStar® or when not retaining OnStar®
• Retains all warning chimes
• High level speaker input
• Retains balance and fade
• Micro “B” USB updatable
• AXDI-GM3 interface
• LD-LCGM-03 harness 
APPLICATIONS
Cadillac  
Catera  1997-2001  ...............................................
Deville  1996-1999 ..............................................
 
Deville*  2000-2005  ..........................................
Eldorado 1996-2002 ..........................................
 
Seville 1996-1997  ...............................................
Seville* 1998-2004 .............................................
Visit    
AxxessInterfaces.com
for more detailed information about the product  
and up-to-date vehicle specific applications
*Note: You must bypass the factory amp in these vehicles to use this interface