1. Introduction
The PAC APSUB-GM61 AmpPRO SUB Advanced Amplifier Interface is designed to seamlessly integrate an aftermarket subwoofer amplifier with the factory radio in select 2014 to 2019 GM vehicles. This interface utilizes the vehicle's databus system, allowing for precise control and optimal sound performance from the factory head unit when adding an aftermarket subwoofer amplifier.
Key features include:
- Compatibility with GM Infotainment systems requiring RPO code IO5 or IO6.
- Provides an upgrade solution for factory, fixed-level, databus-controlled sound systems.
- Enables the addition and control of an aftermarket subwoofer amplifier.
- Designed to prevent the need for additional audio correction devices.
- Preset and equalized to integrate with and optimize factory EQ settings.
2. What's in the Box
Carefully unpack all components and ensure the following items are present:
This image displays the complete contents of the PAC APSUB-GM61 package. It includes the main black interface module with a blue accent, a complex wiring harness with multiple connectors, a coiled black cable, and a small black accessory, likely a remote gain control knob.
- PAC APSUB-GM61 Interface Module
- Vehicle-Specific Wiring Harness
- Remote Gain Control Knob (with cable)
- User Manual (this document)
3. Setup and Installation
Installation of the APSUB-GM61 requires careful attention to detail and familiarity with vehicle audio systems. It is recommended that installation be performed by a qualified professional.
3.1 Pre-Installation Checks
- Verify vehicle compatibility: Ensure your GM vehicle is from 2014-2019 and has the Infotainment system with RPO code IO5 or IO6.
- Gather necessary tools: Basic automotive tools, wire strippers, crimpers, electrical tape, and zip ties may be required.
- Disconnect the vehicle's battery before beginning any electrical work.
3.2 Installation Steps
- Locate the Factory Radio Tuner: The interface connects to the factory radio tuner. This component's location can vary by vehicle model and year (e.g., behind the dashboard screen, in the center console). Refer to your vehicle's service manual or an online resource for the exact location.
- Connect the Wiring Harness: Disconnect the factory wiring harness from the radio tuner. Connect the vehicle-specific wiring harness provided with the APSUB-GM61 in-line with the factory connections.
- Connect to the APSUB-GM61 Module: Connect the other end of the wiring harness to the APSUB-GM61 interface module.
- Connect Aftermarket Amplifier: Connect your aftermarket subwoofer amplifier to the RCA outputs on the APSUB-GM61 module. Ensure the remote turn-on wire from the APSUB-GM61 is connected to your amplifier's remote input.
- Set DIP Switches: The APSUB-GM61 module features DIP switches for vehicle-specific configuration. Carefully read the detailed installation guide included with your product to set these switches correctly for your vehicle's options. Incorrect settings can lead to improper operation.
- Connect Remote Gain Knob: If desired, connect the remote gain control knob to the designated port on the APSUB-GM61 module. Mount the knob in an accessible location.
- Secure Components: Secure the APSUB-GM61 module and all wiring to prevent rattles and damage.
- Reconnect Battery: Reconnect the vehicle's battery.
3.3 Initial Power-Up and Testing
After installation, power on your vehicle and test the functionality of your aftermarket subwoofer amplifier. Adjust the gain on your amplifier and the remote gain knob (if installed) to achieve the desired bass level. Ensure all factory radio functions operate as expected.
4. Operating the AmpPRO SUB Interface
The PAC APSUB-GM61 operates automatically once correctly installed and configured. It provides a clean, low-level audio signal for your aftermarket subwoofer amplifier, integrating it seamlessly with your factory audio system.
- Subwoofer Level Control: Use the optional remote gain control knob to adjust the subwoofer output level independently.
- Factory Radio Integration: The interface maintains all factory radio functions, including volume, tone controls, and steering wheel controls.
- Optimized Output: The module is designed to provide an optimized audio signal, taking into account the factory EQ settings to deliver enhanced bass performance.
5. Maintenance
The PAC APSUB-GM61 AmpPRO SUB Advanced Amplifier Interface requires minimal maintenance. Follow these guidelines to ensure continued optimal performance:
- Keep Connections Secure: Periodically check all wiring connections to ensure they are secure and free from corrosion.
- Keep Clean: Keep the module free from dust and debris. Use a soft, dry cloth for cleaning. Avoid using liquid cleaners directly on the unit.
- Avoid Extreme Conditions: Do not expose the module to extreme temperatures, moisture, or direct sunlight for prolonged periods.
6. Troubleshooting
If you encounter issues with your APSUB-GM61 interface, refer to the following troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| No subwoofer output | Loose connections Incorrect DIP switch settings Amplifier not powered on Factory radio settings | Check all wiring connections to the APSUB-GM61 and amplifier. Verify DIP switch settings against the installation guide. Ensure the aftermarket amplifier is receiving power and a remote turn-on signal. Check factory radio's bass/subwoofer settings. |
| Weak or distorted bass | Amplifier gain set too low/high Incorrect DIP switch settings Poor quality RCA cables | Adjust amplifier gain and remote gain knob (if applicable). Re-verify DIP switch settings. Ensure high-quality RCA cables are used and are not damaged. |
| Factory radio functions not working | Incorrect wiring harness connection Module not receiving power | Double-check all connections of the vehicle-specific wiring harness. Ensure the APSUB-GM61 module is properly powered. |
If the problem persists after attempting these solutions, contact PAC technical support for further assistance.
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | APSUB-GM61 |
| Brand | PAC |
| Compatibility | Select 2014-2019 GM vehicles with Infotainment system RPO code IO5 or IO6 |
| Item Dimensions (L x W x H) | 4 x 1.5 x 6 inches |
| Item Weight | 13.4 ounces |
| Voltage | 12 Volts |
| Number of Channels | 1 (Subwoofer Output) |
| Output Power (Max) | 200 Watts (for connected amplifier) |
| Mounting Type | Freestanding |
| UPC | 609098834186 |
8. Warranty Information
This product is covered by a manufacturer's warranty. For specific details regarding warranty coverage, duration, and claims procedures, please refer to the warranty card included with your product or visit the official PAC website. Keep your proof of purchase for warranty validation.
9. Technical Support
For technical assistance, installation questions, or troubleshooting beyond the scope of this manual, please contact PAC customer support. Visit the official PAC website for contact information, FAQs, and additional resources.
10. Legal Disclaimer
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
