2004 Tahoe (fully loaded with leather, DVD etc.-digital controls). Multiple issues that may be connected. Started with battery running down and needed a jump. AC/HEAT was affected. It 1st had heat on drivers side and cooling on passenger. YouTube suggested some fuse sequences that I tried. Each changed results one way or other. One had AC working only (which leads me to believe it is NOT a compressor problem). One had heat working only. Other sequence had warm and cool but not hot or cold. On top of that, found horn works sometimes and stops for no apparent reason. And same thing with rear windshield wiper. Any thoughts I could try without taking to shop? PS... I also tried disconnecting battery to reset. Changed things but didn't fully work.

 

Welcome to the forum from Oregon.

Try reading this to see if it helps: https://www.fixmyoldride.com/Chevrol...pos=3&at_tot=4