One problem related to blower has been reported for the 1998 Buick Regal. The most recently reported issues are listed below.
The air conditioner blower and the headlights did not work properly. The vehicle was taken to the dealer and they replaced the ignition switch, the air conditioner blower switch and the resistor. While traveling on the highway at 45 mph with the blower on at a low speed, without warning it would shut off along with the headlights. This problem repeated. The consumers daughter had the same vehicle and experienced the same problem. Gm stated that there were no other instances reported. The circuit board for the blower resistor burned up, which caused other componets to fail.