456G 2003 GM Full Size Truck/SUV Databus Interface Module
The 456G interface operates many functions of the lock/security system in the 2003 model year GM Full Size Trucks and SUVs. The 456G converts the signals from Keyless entry, alarm and remote start systems into signals that can be understood by the vehicle's data bus. This allows interfacing with the factory security and
lock system through the data wire in the vehicle. The 456G controls door lock operations including locking, unlocking, and driver's door only unlocking. The 456G also provides control of the factory security system. The factory security can be armed and disarmed when locking or unlocking the doors or disarmed when remote
starting while leaving the doors locked. The dome light and headlights will illuminate when the unit unlocks the doors depending on the vehicle model and trim level.
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New up-dated version works with keyless
and non-keyless entry