Right rear caliper sticking periodically 08 silverada

[Sam un ont]

Right rear brake is sometimes sticking causing the rotor to get hot. At this time I replaced the rotor and caliper with no cure. The flex line was replaced next but this made no difference.
My thinking is that since there is on line coming to the rear to a coupling where it branches to the left and right rear wheel and the left is causing no problem the problem must be something with the right but I can find nothing wrong
Any help is greatly appreciated

 

[zora]

Have you a diagnostic tool capable of checking the ABS module?

 

[porterpaints]

how do you check the abs module

 

[zora]

how do you check the abs module

You need an interactive scan tool that can communicate directly with the module.