How do you replace ignition cylinder in GMC Savana 1996?

To replace the ignition cylinder in a 1996 GMC Savana, start by disconnecting the negative battery cable to ensure safety. Remove the steering column cover by taking out the screws, then insert the key into the ignition and turn it to the "Run" position. Locate the release pin on the ignition cylinder, press it in, and pull the cylinder out. Finally, insert the new ignition cylinder, ensuring it clicks in place, and reassemble the steering column cover before reconnecting the battery.