Remote auto start will not start a 2007 chevy suburban ltz

If the keyless remote works to unlock and lock the doors, then it should start the engine. In order to use this feature, you have to lock the doors (make sure that all door lock by pushing the lock button twice) with the remote by pushing the lock button, then you hold down the start button on the remote for 2 to 3 seconds and it should start. You can start and stop the engine with the remote 2 or 3 times with the remote, after that it will no longer let you use the remote start until you physically get in the car and start the engine to reset the system. Check your driver information center options using the steering wheel controls. There is an option to enable and disable the remote start option.