PAC Radio Replacement Interface for GM 2006–2025 — OnStar & Steering Wheel Control Retention

PAC’s radio replacement interface lets you swap the factory head unit in many 2006–2025 GM vehicles while keeping OnStar, steering wheel controls, Bluetooth and rear-seat audio functions intact.

Swapping a factory radio in GM trucks, SUVs and cars can disable useful factory systems. This PAC interface is designed specifically to preserve those systems when installing an aftermarket head unit. It provides the necessary wiring, outputs and retainers so you can upgrade audio without losing core vehicle features.

How does this interface preserve OnStar and factory Bluetooth?

The module maintains the vehicle’s OnStar connection and, on supported 2009+ models, preserves the factory Bluetooth hands-free functionality. It routes communication signals and power so the factory services keep working after the stereo swap.

• Built-in OnStar retention harness for compatible GM models
• Factory Bluetooth retention on 2009 and newer vehicles
• Preserves hands-free calling and factory voice controls when supported

Will steering wheel controls and rear-seat audio still work?

Yes—this interface retains steering wheel control (SWC) inputs and rear-seat audio controls where the vehicle originally supported them. The unit translates factory control signals into commands the aftermarket radio understands.

• Steering wheel control retention for common GM command protocols
• Rear-seat audio control passthrough and dual-zone support
• Illumination output keeps display dimming synchronized with dash lighting

What vehicle outputs and safety integrations are supported?

The PAC unit provides practical outputs needed for a complete install, including navigation outputs and parking brake/ reverse signals. These outputs let aftermarket radios interface with backup cameras, navigation screens and safety interlocks.

• Reverse wire output for backup camera activation
• Navigation outputs for compatible head units
• Parking brake output to satisfy safety lockouts on some radios

How does installation impact functionality and compatibility?

Installation preserves original vehicle features while enabling modern head unit capabilities, but compatibility depends on specific GM model year and trim. Use the PAC fitment guide or consult a professional installer to confirm vehicle compatibility and needed harnessing.

• Fits select GM vehicles from 2006 through 2025—confirm with PAC fit guide
• Requires matching harnesses and clean connections for full feature retention
• Professional installation recommended for complex dashboards or navigation integration

Who is this for: This interface is for DIYers and installers upgrading the stereo in compatible GM cars, trucks and SUVs who want to retain factory conveniences such as OnStar, steering wheel controls, factory Bluetooth (2009+), rear-seat audio and navigation outputs. If you need to preserve these features while adding an aftermarket head unit, the PAC radio replacement interface provides the wiring and outputs required for a professional result.