2004 chevy trailblazer_lt
Have a strange situation. My 04 LT all of a sudden in the middle of the day decided to light up the "Service 4WD", ABS, and brake warning lights on my dash. And both front and rear heaters stopped working. I have the dual manual heater controls (not the digital display). As far as I can tell the diverters aren't working because I don't hear them moving when I switch from floor to vent to defrost. The vehicle is otherwise running normally and all other accessories work. I reset the computer by disconnecting the battery for a couple hours with no change. Thoughts and ideas anyone? Thank you.