2003 Chevy Silverado Four Wheel Drive Automatic 105, 00 miles
Yesterday I went to start the P/U. Battery was dead.
Replaced the battery and it started right away.
I now noticed that I couldn't raise or lower the blower speed. It was stuck in high speed. The control button showed that it went up faster or slower. But there was no actual change in fan speed. Turned the P/U off and the fan continued on high speed.