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Axxess LC-GMRC-03 Wiring Interface Install a new car stereo and retain warning chimes, 12-volt accessory power, and Retained Accessory Power (R.A.P.) in select 1996-2001 Cadillacs

Item # 120LCGMRC3

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5 questions - 6 answers

Item # 120LCGMRC3

About the Axxess LC-GMRC-03 Wiring Interface

Bob Bihlmayer

Axxess LC-GMRC-03

If you're planning to replace the radio in your 1996-2001 Cadillac, the LC-GMRC-03 wiring interface from Axxess will retain your warning chimes, 12-volt accessory power, and retained accessory power (R.A.P). The interface uses an onboard speaker to produce all warning chimes. The LC-GMRC-03 works with non-amplified systems or when you're bypassing an amplified system. Warranty: 1 year.

What's in the box:

  • Radio replacement interface
  • Wiring harness
  • Installation Instructions

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More details on the Axxess LC-GMRC-03 Wiring Interface

Stacey B.

Product Research


Vehicle Compatibility: The Axxess Integrate LC-GMRC-03 is designed for use in select 1996-2005 Cadillac models with non-amplified factory systems (or when replacing the factory amplified system) and without OnStar.

Make Model Year
Cadillac Catera 1997-2001
Deville 1996-2005
Eldorado 1996-2002
Seville 1996-2004

Note: Please enter you vehicle information to confirm compatibility and see what additional accessories will be needed.

Retained Features: The LC-GMRC-03 provides +12V/10A accessory output, retains warning chimes, and retains R.A.P. (retained accessory power).

  • +12V Accessory Output: In many Cadillacs, there is no 12-volt accessory wire in the factory harness, which requires the installer to run an accessory wire to the fuse box or underneath the steering column when installing an aftermarket radio. The LC-GMRC-03 is designed to provide a 12V/10A switched accessory output (red wire).
  • Warning Chimes: The LC-GMRC-03 retains factory warning chimes through onboard speaker.
  • Retained Accessory Power (R.A.P.): The ignition power source of most Cadillac vehicles keeps the radio on until one of the doors is opened. This feature is called the R.A.P. (retained accessory power). The LC-GMRC-03 is designed to retain this feature.

Wiring Harness: The wiring harness has a black 12-pin connector on one end and a blue 32-pin molex connector on the other end. The 12-pin connector plugs into the LC-GMRC-03, while the 32-pin molex connector interfaces with the existing factory plug. The included wiring harness also includes 17 bare wires that will need to be hardwired to your new aftermarket radio's harness, when applicable.

Wire Color Function
Red +12V Accessory
Yellow +12V Constant
Black Ground
Orange/white Illumination
Orange Not Used
Blue Antenna turn-On
White Left Front Speaker +
White/black Left Front Speaker -
Gray Right Front Speaker +
Gray/black Right Front Speaker -
Green Left Rear Speaker +
Green/black Left Rear Speaker -
Purple Right Rear Speaker +
Purple/black Right Rear Speaker -
Blue/pink Vehicle Speed Sense
Green/purple Reverse Gear
Light Green Parking Brake

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Customer Q&A

5 questions already asked

Can the amount of times it chimes be changed? It chimes way more than the factory system.
sparky1847  Feb 05, 2024
1 answer
Greetings Anthony. Thank you for your question. From what I can see, there is no way to change the interval on the warning chimes. You can try calling the manufacture to see if they may know of a trick. Metra Electronics is the manufacture, and their number is 386-257-1187.
hogan  Feb 05, 2024 (Staff)
Want to make sure this works with my 2001 Cadillac Deville before I purchase this?
cole  Nov 23, 2023
1 answer
The Axxess LC-GMRC-03 is compatible with your 2001 Cadillac Deville Cole, but it does not retain the original factory amp and subwoofer. This harness bypasses your original amp powering your speakers off of the internal amp inside your aftermarket radio and does not retain function of the original factory subwoofer. If you wish to add a large aftermarket amp/subwoofer combo and power your speakers off your replacement radio this interface is a great choice. If you wish to retain the use of your factory amp and subwoofer you can use the alternate PAC OS2-GM32X wiring interface in the link below that will keep those factory speakers and subwoofer functioning with the new radio. I hope this helps!
bo  Nov 24, 2023 (Staff)
Installed, and everything works but only getting sound from front left speaker. Any ideas?
timothy  Jun 30, 2018
2 answers
also this is not compatible with certain Cadillac vehicles that have a stock amplifier system in the trunk between the back seat and the fuse box.
ricardo  Jul 02, 2018
If you installed this device make sure the pins in the connectors are lined up correctly. On the connectors also make sure your solder or connector held and the tape or heat shrink is going completely around each speaker wire. the most important thing. Make sure the speaker connectors in each door are not touching. if the connectors touch metal they will cut out the sound. Also check the speaker connectors are completely snapped in. just a few checks to do.
ricardo  Jul 02, 2018
1996 cadillac eldorado etc i installed grmc 03 and only one speaker turns on ?
eric  Nov 27, 2017
2 answers
I'm sorry I don't know what is causing the problem with the one speaker working.Enter
jeffrey  Nov 28, 2017
You need to unplug the battery and reset the computer to the car.. I didn't have very much luck either I had to do either stock or all custom
barrett  Nov 27, 2017

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