1999 gmc sierra 1500 v6 a/c clutch engage all the time on 1999 GMC Sierra 1500

my a/c clutch is engage all the time like when i have the HVAC it there off or i on plug the high or low pressure switch the clutch it still engage but it just turn off when i unplug the a/c relay switch or shut off the truck

Asked by for the 1999 GMC Sierra 1500
And your problem is???