Peripheral

Model: GMAH24B

GM OnStar / BOSE Radio Replacement Interface
OnStar and Class-2 Data-bus Interface for select late model (00-08) GM vehicles with Class-2 radios with OnStar and BOSE sound systems.



The GMAH24B is a plug and play interface that allows replacement of a General Motors Class II factory radio. It will maintain operation of the OnStar system, Bose amplifier and speakers. The GMAH24B has on board switching to allow audio from the OnStar system to play through the two front factory speakers when OnStar is active. Retains door chimes when used with
Peripherals optional GMAHCM chime module on selected vehicles listed below. Also retains Vehicle Parking Assist chimes.

• Safe & Sound Class II circuitry will not disable vehicle data bus even if interface loses power.
• OnStar active LED and Ignition on LED
• Provides +12v switched accessory output. No more searching for switched +12v in fuse box or kick panel.
• Smart Sense Mute output to either mute the aftermarket radio or to turn if off when OnStar is active.
• OnStar Volume control via factory steering wheel audio controls on selected vehicles*. Radio controls can be retained to control new radio by using the PESWIX.
• New radio will operate with the vehicle RAP (Retained Accessory Power) system. The radio stays on after the key is turned off and stays on for approximately 10 minutes or until a door is opened.
• Notes:
  • The GMAH24B does not retain the factory XM receiver, rear seat controls/headphones or rear seat DVD. You will lose these options when the factory radio is replaced with an aftermarket radio.
  • You may use this interface even if the vehicle does not have OnStar but need to interface the Bose amplifier.
  • If you are not retaining the Bose amplifier, use the GMAH24 interface instead of this GMAH24B interface.

Vehicle Compatibility Notes

• For vehicles that have a "Premium Bose" amp that only accepts 2 channel audio inputs.  OnStar volume can be controlled via the steering wheel audio controls.  The GMAHCM chime module is not required when using the BOSE amplifier.  If you are not using the BOSE amplifier, then the GMAH24 and GMAHCM  interfaces are required.  The aftermarket radio will not fade, however it will still continue to balance.