PAC RadioPRO Advanced GM1A-RS Radio Replacement Interface for Select Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, Saab & Saturn Vehicles

The PAC RadioPRO Advanced GM1A-RS Radio Replacement Interface for Select Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, Saab & Saturn Vehicles is a vehicle-specific data-bus interface for installing an aftermarket radio while retaining the supported factory audio, steering-wheel-control, chime, telematics, and convenience functions identified by PAC.

At a Glance

• Retains supported factory steering-wheel controls
• Retains warning chimes through the supplied external speaker
• Retains supported standard and premium Bose amplifiers
• Supports application-based audio-fade adjustment and USB updates

Exact Vehicle Compatibility

Choose the row that matches your vehicle and factory equipment. The “Compatible When” column identifies required factory features; the “Not Compatible When” column shows configurations that need a different interface or are excluded.

Compatibility & What You Need

• Main part: PAC GM1A-RS. The part number and factory-equipment requirements must match the application exactly.
• Application-dependent accessory: PAC VS41 may be required or useful where stated in the vehicle notes or current PAC instructions.
• Aftermarket radio: Sold separately. Confirm it has every input and output required for the factory features you want to retain.
• Professional installation is strongly recommended for data-bus radio replacement and factory-amplifier integration.

Important Application Notes

• OnStar is not retained. Choose GM1A-RST when the vehicle has OnStar and that feature must remain available.

Technical Specifications

Manufacturer Resources

• GM1A-RS Instruction Manual

What's Included

• One genuine PAC GM1A-RS product package
• Manufacturer-supplied module, harnesses, and connection leads shown for this exact part number

Sold separately: aftermarket radio, dash kit, antenna/camera/USB adapters, optional retention modules, and installation materials unless expressly identified as included.

Fitment disclaimer: Compatibility is not determined by year and model alone. Verify the exact factory radio, screen, amplifier, audio package, connector, vehicle options, firmware, and every required accessory before ordering. Product photos show the listed PAC package; surrounding installation equipment is not included. Contact MCOR Automotive through the chat button for application help.

Why Buy From MCOR Automotive

• Authorized PAC retailer with manufacturer-backed warranty support
• Vehicle-specific compatibility help before purchase
• Professional car-audio integration and installation support