iDataLink CMGMXA0 Remote Start Control Module For GM Vehicles 2004-UPiDataLink CMGMXA0 iDatastart GMX remote start control module for select GM models 2004 and up. Enables (3 x LOCK) remote start from the factory transmitters on most vehicles. No key required for immobilizer bypass on most models. Compatible with iDatastart long range RF kits, select T harnesses and smartphone control systems sold separately. Specifications: For GM Vehicles 2004 And Up Bypasses Factory Immobilizer System Transmitter Kit Compatible T