How to change transmission control solenoid in a 2002 Bonneville?

To change the transmission control solenoid in a 2002 Pontiac Bonneville, first, disconnect the battery and safely lift the vehicle. Remove the transmission pan by unbolting it and draining the fluid to access the solenoid. Locate the solenoid, typically found on the valve body, and unbolt it from its position. Replace it with the new solenoid, reassemble the transmission pan, refill the Transmission Fluid, and reconnect the battery.