1. Introduction
The PAC RP5GM51 Radio Replacement Interface is designed to facilitate the installation of an aftermarket radio in select 2014 Chevrolet and GMC trucks. This interface retains essential factory features such as OnStar, steering wheel controls (SWC), chime functions, and provides data-controlled outputs for navigation radios. It ensures seamless integration of your new audio system while preserving critical vehicle functionalities.
2. Package Contents
Verify that all components are present before beginning installation:
- PAC RP5GM51 Interface Module
- Vehicle-specific wiring harnesses (20-pin and 16-pin)
- CMX Chime Module
- Antenna Adapter
- User Manual (this document)
3. Compatibility
The RP5GM51 interface is compatible with the following vehicles:
- 2014 Chevrolet Silverado 1500
- 2014 GMC Sierra 1500
These vehicles must be equipped with a 29-bit GM LAN V2 databus and utilize 20-pin and 16-pin harnesses for radio connections.
4. Key Features
The PAC RP5GM51 interface provides the following functionalities:
- Radio Replacement: Allows for the installation of an aftermarket radio.
- Chime Retention: Retains factory chime functions.
- Navigation Outputs: Provides data-controlled outputs for speed, reverse, and parking brake status, essential for navigation radios.
- OnStar Retention: Maintains the functionality of the OnStar telematics system.
- Park Assist Retention: Retains front and rear park assist features.
- Steering Wheel Control (SWC) Retention: Preserves original steering wheel control functions without additional interfaces or programming.
- Retained Accessory Power (RAP): Provides a data-controlled RAP accessory output.
- Updatable Firmware: The interface can be updated via the PAC website using a PAC-UP USB adapter (sold separately).
5. Installation
Installation of the RP5GM51 interface requires technical knowledge of vehicle wiring and audio systems. Professional installation is recommended. Always disconnect the vehicle's battery before beginning any electrical work.
5.1. Wiring Connections
Carefully follow the wiring instructions provided with your aftermarket radio and the RP5GM51 interface. Key connections typically include:
- Power and Ground: Connect the interface's power and ground wires to the vehicle's corresponding circuits.
- Speaker Wires: Connect the speaker outputs from the aftermarket radio to the interface's speaker input wires.
- Accessory Wire: Connect the accessory wire to provide switched power to the aftermarket radio.
- Navigation Wires: Connect the speed sense, reverse, and parking brake wires from the interface to the aftermarket navigation radio.
- Steering Wheel Control (SWC): Connect the SWC output from the interface to the SWC input of the aftermarket radio.
- OnStar and Park Assist: Ensure these connections are made according to the specific wiring diagram to retain functionality.
- Chime Module: Connect the CMX chime module to the interface as instructed to retain audible chimes.
5.2. Module Programming
The RP5GM51 interface is typically pre-programmed for compatible vehicles. However, specific configurations or updates may require connecting the module to a computer using a PAC-UP USB adapter. Refer to the PAC website for the latest firmware and programming instructions.
5.3. Testing
After installation, test all retained factory features (OnStar, SWC, chimes, park assist) and aftermarket radio functions to ensure proper operation before reassembling the dashboard.
6. Operation
Once correctly installed and configured, the PAC RP5GM51 interface operates automatically. It translates vehicle data signals to allow your aftermarket radio to function seamlessly with the retained factory features. No direct user interaction with the interface module is required during normal operation.
7. Maintenance
The primary maintenance for the RP5GM51 interface involves keeping its firmware updated. Periodically check the PAC website for new firmware versions that may offer improved compatibility or bug fixes. Firmware updates require a PAC-UP USB adapter.
8. Troubleshooting
If you encounter issues after installation, consider the following troubleshooting steps:
- No Power to Radio: Verify all power and ground connections. Check vehicle fuses.
- No Sound: Ensure all speaker wires are correctly connected and not shorted. Check aftermarket radio settings.
- Steering Wheel Controls Not Working: Confirm the SWC wire is connected to the aftermarket radio's SWC input. Ensure the aftermarket radio is configured for external SWC.
- No Chimes: Verify the CMX chime module is correctly connected to the interface.
- OnStar/Park Assist Issues: Double-check all connections related to these features.
- Intermittent Operation: Inspect all wiring connections for looseness or corrosion.
- Firmware: Ensure the interface has the latest firmware version.
For persistent issues, contact PAC technical support or consult a professional installer.
9. Specifications
| Specification | Detail |
|---|---|
| Model Number | RP5-GM51 |
| Product Dimensions | 1 x 4 x 1.5 inches |
| Item Weight | 0.96 ounces |
| Connectivity Technology | USB (for updates) |
| Special Features | OnStar telematics system maintenance, front and rear parking assistance retention |
| Power Source | Corded Electric (vehicle power) |
| Manufacturer | PAC |
| Date First Available | November 8, 2013 |
10. Warranty and Support
For warranty information, please refer to the documentation included with your purchase or visit the official PAC website. For technical assistance, product support, or to download the latest firmware, please visit the PAC website or contact their customer service department directly.
11. Important Safety Information
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Always ensure proper ventilation during installation and handle components with care. Disconnect the vehicle's battery before performing any electrical work to prevent injury or damage to the vehicle's electrical system.
