PAC Radio Replacement Interface for 2000–2013 GM Vehicles — Retains OnStar & Steering Wheel Controls

The PAC radio replacement interface lets you swap an aftermarket head unit into many 2000–2013 GM vehicles while keeping OnStar, steering wheel controls and key OEM signals working.

When replacing a factory radio in compatible Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, Saab or Saturn vehicles, this PAC module preserves essential vehicle functions so your new stereo integrates cleanly with the car's electronics. It supports both amplified and non-amplified factory audio, preserves chimes and camera signals, and supplies navigation-related outputs installers expect.

Which vehicles will this PAC interface work with?

This interface supports a wide range of GM-platform vehicles from roughly model years 2000 through 2013. The compatibility list covers many common sedans, SUVs, trucks and vans so you can upgrade radios on older GM cars without losing features.

• Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, Saab and Saturn models from 2000–2013
• Examples include: Escalade, Tahoe, Silverado, Corvette, Colorado, Trailblazer, Envoy, H2/H3, and many Buick and Pontiac models
• Full application compatibility should be confirmed by year/model and factory amplifier presence before purchase

How does it retain factory OnStar, chimes and steering wheel controls?

The PAC module preserves OnStar functionality (voice and call features) and maintains OEM warning chimes, reverse camera trigger and other vehicle signals through its databus interface. Steering wheel button control is supported out of the box via pre-loaded software, removing the need for external reprogramming in most installs.

• OnStar voice/functions retained (OnStar text not supported)
• Pre-configured steering wheel control software for plug-and-play setup
• OEM chimes, reverse trigger and parking assist signals preserved

Will this work with factory amplified Bose systems and aftermarket amplifiers?

Yes — the interface accommodates both factory amplified Bose systems and non-amplified factory audio. For aftermarket amps or digital signal processors, an optional TOSLINK digital output accessory provides a clean, noise-free digital feed.

• Supports Bose factory amplifier retention
• Compatible with non-amplified OEM systems as well
• Optional APA-TOS1 adapter adds optical digital output for aftermarket DSP/amps

What installer-friendly outputs and update options are included?

The unit exposes the navigation and vehicle signals installers need: vehicle speed, reverse trigger, parking brake, illumination and retained accessory power. Firmware is user-updatable through PAC’s RadioPRO PC application for future compatibility improvements.

• Retained accessory power (RAP), vehicle speed sensor (VSS) and reverse trigger provided
• Illumination and parking brake outputs for aftermarket head units
• USB-updateable firmware via RadioPRO (PAC-UP sold separately)

Who is this for: installers and DIYers upgrading the factory radio in older GM-platform vehicles who want to keep crucial OEM features — like OnStar voice, steering wheel controls, factory chimes, backup camera feed and amplified Bose audio — intact. Choose this PAC interface when you need a reliable databus solution that minimizes wiring changes and preserves vehicle functions during an aftermarket radio install.