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PAC AP4-GM81

Install a New Car Amplifier and Retain Factory Features in select 2023-2026 vehicles from Chevrolet with B&O A2B Amplifed Systems

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• Direct connection to the factory harness
• Compatible with select 2023-2026 vehicles from Chevrolet
• For models with Bose A2B factory amplified systems
• Retains factory nav, chimes, Bluetooth, voice activation
• Color coded wires for easy installation
• No cutting or splicing required

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List price $549.00
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$479.00

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Description


PAC brand icon

Authorized dealer

Advanced Amplifier Integration for Select 2023+ GM Bose Amplified Systems

The PAC AP4-GM81 provides a definitive solution for upgrading the audio system in select 2023 and newer General Motors vehicles equipped with BOSE A2B factory-amplified sound systems. Engineered specifically as an advanced AmpPRO integration interface, this robust module allows you to effortlessly add aftermarket amplifiers while completely retaining the original radio's fit, finish, and functionality. By utilizing a true plug-and-play harness design, it ensures a frictionless installation experience that securely bypasses the factory amp to deliver a clean, uncolored audio signal without the need for complex wire splicing or permanent dashboard modifications.

Beyond its straightforward utility, this indispensable interface is meticulously built to satisfy the acoustic and functional demands of modern GM networks. The AP4-GM81 flawlessly preserves all essential OEM safety and convenience features, including Bluetooth hands-free audio, navigation prompts, warning chimes, and OnStar telematics. Furthermore, it delivers versatile tuning and expansion options through high-voltage 5-volt RMS front, rear, and subwoofer RCA outputs, a variable 2-channel TOSLINK optical digital output, and an included sub-level control knob. By allowing you to confidently fine-tune volume, fade, balance, and customized center frequencies directly through your factory controls, it secures a professional-grade acoustic upgrade customized specifically for your cabin.

Product Features:

  • Compatible with select 2023-2026 vehicles from Chevrolet
  • Compatible on models with BOSE A2B factory amplified systems
  • Factory amplifier must be removed from the vehicle when installing this interface
  • Provides a 6-channel pre-amp output for use with aftermarket audio equipment
  • Provides 2 channel fiber optic digital audio output (TOSLINK)
  • Retains factory navigation prompts, safety chimes, Bluetooth, and voice activation
  • Delivers variable 5V RMS pre-amp output with fading, balance, equalization, and level control
  • Customized OE bass, mid and treble center frequency selection
  • Plug and play connection, no cutting or splicing required
  • Bass level controller included
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Compatible Vehicles


Please use our Fitment Guide to determine specific compatibility for the submodel and audio features

The vehicle you have selected 1999 Chevrolet Corvette is not compatible. Change vehicle or See list of compatible similar products


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Specifications & Details


Features
Additional Harness Features
Bluetooth Integration
Chime Retention
Retains Balance and Fader
Retains Equalizer Presets
Main Harness Function
Install an Aftermarket Car Amplifier & Connect to Factory Radio
Vehicle Sound System
Premium Sound
Premium Harness Features
Chime Retention
Yes
Compatible Premium Audio Systems
Premium Bose
Factory System Amplification
Amplified
Promotions
Deals
VIP
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

PAC

Model Number:

AP4-GM81

Weight:

0.77lbs

Internal SKU:

ap4gm81

Internal Product ID:

230944

Customer Ratings & Reviews


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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.