I have a 2003 4.2l I6 LS Trailblazer with over 186K Miles. Whenever I engage the rear window defroster it shorts out my power windows and locks intermittently almost like a timer every few seconds it shorts out everything. I have gotten by just not using the rear defroster but I am about to do...

Power windows in my 2007 trailblazer will not stay down, as soon as you release the switch, windows go right back up, also, drivers side will not go up all the way, remains at 1" open. Any suggestions on what to check would be greatly appreciated.. Thank You