Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
Good morning fam! I have a 2014 gmc sierra 5.3l 2wd that is having ac problems. when the compressor is commanded on when pressing the ac button it engages for for a few seconds then starts to screech really loud until you turn it off. First thing was replace the compressor which I did and I also did the complete kit including condenser only to realize its doing it again. So I noticed when i disconnected the pressure control solenoid it doesn't scream for help only until i plug it back in. Im wondering if the HVAC control module could be faulty or how could iu test the pressure solenoid with a scope to see if there is something going on with the circuits or module itself? Andy feedback would be awesome thank you in advance.
Last edit: 5 hours 35 minutes ago by WrenchWizard88.
Topic Author
