How do you remove serpentine tensioner 2004 envoy?

To remove the serpentine tensioner on a 2004 GMC Envoy, first, ensure the engine is off and cool. Locate the tensioner, then use a socket wrench to turn the tensioner pulley counterclockwise, relieving tension on the serpentine belt. Remove the belt from the tensioner pulley, then unbolt the tensioner from its mounting bracket using the appropriate socket size. Finally, lift the tensioner off and replace it with a new one if needed.