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PAC ADD-GM21C

Used When Replacing a Factory Amplifier or Adding an Aftermarket Amplifier in Select GM Vehicles

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This item has been discontinued

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Harness Features:

  • Use this cable to add to, or replace factory GM amplifiers with an aftermarket amplifier
  • Compatible with select 1998 - 2003 GM vehicles
    • Also Requires PAC OEM-1 for an easy upgrade of a factory "premium" sound system
    • If replacing the the factory amplifier or adding an aftermarket amplifier, the PAC AMP-RCA will be needed
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Compatibility List

  • Chevrolet:
    • 1998-2002 Camaro (with Monsoon)
  • Pontiac:
    • 1998-2002 Firebird (with Monsoon)
    • 1999 Bonneville
    • 2000-2003 Grand Prix

Connections:

  • Yellow – 12V Constant
  • Red – 12V Accessory
  • Black - Ground
  • Orange – Dash Light Dimmer/Illumination
  • Green – Left Rear Speaker (+)
  • Green with Black Stripe Left Rear Speaker (-)
  • White – Left Front Speaker (+)
  • White with Black Stripe – Left Front Speaker (-)
  • Purple – Right Rear Speaker (+)
  • Purple with Black Stripe – Right Rear Speaker (-)
  • Gray – Right Front Speaker (+)
  • Gray with Black Stripe – Right Front Speaker (-)

Product History:

PAC ADD-GM21C thumbnail
(newest, current model)
PAC ADD-GM21A thumbnail
(previous model, replaced by PAC ADD-GM21C)

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.
Install an Aftermarket Car Amplifier & Connect to Factory Radio
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.
Chevrolet
Pontiac
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.
Chevy Camaro
Pontiac Bonneville
Pontiac Firebird
Pontiac Grand Prix

Warranty and Return Policy

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

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Product Summary

Manufacturer

Model Number

ADD-GM21C

UPC

606523605113

Weight

0.25lbs

Internal SKU

addgm21c

Internal Product ID

17697

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: PAC ADD-GM21C