Display lights went bad. Module worked OK by the hunt method of choosing heat-cool-direction of air flow, but could not read display. None of Chevrolet dealers I have queried can get me a replacement. Found Cardone 4C-1004 through O'Reilly Auto. Replaced old with the Cardone. Everything works, except A/C. Now having difficulty getting a replacement for that. Chevrolet dealer tested and indicated that a couple of the pins on the control module are shorted to ground, internal to the module. Ideas? Thanks in advance.