How do you reset a 2004 suburban alarm system?

Here is the procedure to reset you factory GM alarm system on your 2004 Suburban, this assumes you do NOT have a professional Scan II tool.

30 Minute Learn Procedure

1. Turn ON ignition, with the enngine OFF.
2. Attmept to start/crank the engine with a quick turn of the ignition key, then release the key to the ON position, the vehicle will not start.
3. Observe the SECURITY/Alarm icon/telltale, after about ten (10) minutes the alarm telltale/icon will turn OFF.
4. Turn OFF the ignition, and wait five (5)seconds.
5. Repeat steps 1 thru 4 two (2) more times for a total of three (3) cycles/30 minutes; the vehicle is now ready to relearn the Passlock Sensor Data Code and/or passWord on the next ignition switch transition from OFF to CRANK.
6. Start the engine. The vehicle has now learned the Passlock Sensor Data Code and/or passWord. IMPORTANT: The vehicle learns the Passlock Sensor Date Code and/or passWord on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
7. History of any DTC will sefl clear after 100 ignition cycles if you do not have a scan tool that clears codes.