Does anyone know what GM Data Bus Interface Module can be used for H3 in order to install the aftermarket security system such as Viper and Clifford ?

Does anyone know what GM Data Bus Interface Module can be used for H3 in order to install the aftermarket security system such as Viper and Clifford ?

There is no need for an interface module to install a security system. If you install a remote starter, you will need to interface with the passlock system. The only module available is the PLXR, and honestly it's unstable in my experience I would recommend using relays and resistors to bypass. Seems to be much more reliable in my experience. If you do add an aftermarket system, make sure not to use the OEM remotes anymore put them in the house. The OEM remotes will arm the factory alarm, and you can't shut it down from the aftermarket system.

Mike

NowYaKnow, thank you for the info. I thought I would need to use Data Bus Module such as DEI457 in order to lock and unlock doors through aftermarket security system.

The locks in this vehicle aren't mutliplexed so there is no need for an additional module. Just normal negative trigger the wires are light blue (lock) and dark blue (unlock) and can be found in the drivers kick panel coming in from the drivers door.

Mike