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

Replacing a factory radio can disable critical vehicle systems or force expensive reprogramming. The PAC Radio Replacement Interface is designed for compatible GM, Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, Saab and Saturn models from roughly 2000–2013, keeping most original functions intact and providing navigation and accessory outputs for aftermarket head units. It works with non-amplified and many factory-amplified systems and offers firmware updates for future compatibility.

Which vehicles will this PAC interface work with?

This module supports a wide range of GM-platform vehicles from the 2000–2013 era. Check the full application guide for model-year details, as compatibility covers sedans, trucks, SUVs and vans across multiple brands.

• Buick: Century, Lacrosse, Rainier, Rendezvous, Terraza
• Cadillac, Chevrolet and GMC: Escalade, Avalanche, Colorado, Suburban, Tahoe, Silverado and more
• Also compatible with Hummer H2/H3/H3T, Isuzu Ascender, Oldsmobile, Pontiac, Saab 9-7X and Saturn Relay

How does the PAC interface preserve OnStar and steering wheel controls?

The PAC unit retains OnStar voice and call functionality (note: OnStar text messages are not preserved) and keeps factory steering wheel control operation using pre-loaded SWC software. This removes the need for extra programming in most installations.

• Retains OnStar voice features; OnStar text not retained
• Pre-loaded steering-wheel control profiles — no reprogramming required
• Includes antenna adapter for proper reception

What OEM features and outputs are maintained after installation?

The interface passes through many original equipment signals so safety and convenience features continue to function with an aftermarket radio. It also provides navigation-related outputs and vehicle data needed by modern head units.

• Warning chimes with adjustable volume and rear-seat audio/video support
• Back-up camera trigger, reverse trigger wire and parking brake output
• Retained accessory power (RAP), vehicle speed sensor (VSS) and illumination outputs

Can I use this with aftermarket amplifiers, DSPs or future firmware updates?

Yes — the PAC interface supports both factory amplified and non-amplified systems, and offers an optional TOSLINK digital output for clean audio to aftermarket amplifiers or DSPs (APA-TOS1 sold separately). Firmware is updateable with PAC’s RadioPRO tool when needed.

• Optional TOSLINK digital output for noise-free digital connections
• Works with factory Bose amplified systems where applicable
• USB-updatable firmware via RadioPRO (PAC-UP required separately)

Who is this for? If you own a compatible GM-era vehicle and want to install a modern aftermarket head unit without losing OnStar voice, steering wheel controls or essential OEM functions, the PAC Radio Replacement Interface is engineered for your needs. It’s especially useful for installers, DIY car-audio enthusiasts and owners who require retained navigation triggers, reverse camera support and reliable integration with factory audio systems.