Heise Axxess GM 06-Up LAN with R.A.P., Acc & Nav Outputs - Clean

Our review of the Heise Axxess GM 06-Up LAN W/Rap Acc & Nav Outputs finds it aimed squarely at installers and DIYers who need a clean way to add aftermarket head units or subs to GM vehicles from 2006 onward. The bottom line: it combines interface and DSP features that preserve retained accessory power while supplying fixed and analog outputs so the factory system remains functional. For anyone replacing a factory radio in a non-amplified or previously amplified system, its combination of a 12-volt 10-amp accessory feed, NAV outputs and high-level speaker input makes installations simpler and more reliable.

Key Features

• Accessory Power: Supplies a dedicated 12-volt 10-amp accessory output so aftermarket radios and accessories get steady power without stressing the vehicle wiring.
• Retained Accessory Power: Retains R.A.P. so electronics remain powered for convenience features like delayed shutdown and memory recall after ignition off.
• NAV Outputs: Provides parking brake, reverse and speed sense outputs to allow safe and correct operation of navigation and video features in the new head unit.
• High-Level Input: High-level speaker input allows use with factory speaker-level signals when adding an aftermarket amplifier or subwoofer to an OE system.
• Non-Amplified Compatibility: Designed for non-amplified systems or for replacing amplified systems, reducing the need for extra adapters during swaps.

Who It's For

This interface is best for car audio installers, tech-savvy DIYers and anyone replacing the factory head unit in GM vehicles from 2006 and up who needs to retain factory features like R.A.P. and steering wheel or navigation controls. It is particularly helpful when adding a subwoofer or amplifier to an OE speaker-level system because of the high-level input and fixed-level outputs.

Customers who want a simple plug-and-play harness for basic audio swaps will appreciate it, while those requiring vehicle-specific amplified system integration with OEM DSP retention beyond the listed outputs should verify compatibility first or choose a model explicitly listing amplified system support.

Pros & Cons

Pros

• Provides a reliable 12-volt 10-amp accessory supply to power aftermarket radios and accessories.
• Retains R.A.P. so convenience features and memory functions keep working after shutdown.
• Includes NAV outputs and high-level input to support navigation, reverse camera triggers and subwoofer additions without extra converters.

Cons

• Not specified for every amplified OEM system, so extra confirmation may be needed when replacing amplified factory setups.

Specifications

Our Verdict

The Heise Axxess GM 06-Up LAN interface is a practical, value-focused choice for installers and knowledgeable DIYers who need to retain key vehicle features while adding aftermarket audio gear. Its 12-volt 10-amp accessory supply, R.A.P. retention and NAV outputs make common swaps and subwoofer additions straightforward; buyers should confirm amplified OEM compatibility if needed.

Frequently Asked Questions

Will this retain my vehicle memory and convenience features?
Yes, it retains Retained Accessory Power (R.A.P.), which preserves memory and delayed power-off functions.

Can I add a subwoofer using this interface?
Yes, the fixed outputs and high-level speaker input allow adding a subwoofer or amplifier to an OE system without needing extra converters in many cases.

Does this work with amplified factory systems?
It is intended for non-amplified systems or when replacing amplified systems, but installers should confirm specific vehicle amplifier wiring before proceeding.