Owners of 2003-07 Cadillac CTS and CTS-V cars, as well as 2004-06 SRX sport/utes, may complain that the air conditioning control head flickers, then returns to normal operation.
According to GM, the flickering is usually intermittent, more noticeable at night and is caused by software issues in the control head module.
Reprogramming the module with updated software is the only surefire fix. Check with a dealer for the specifics of the flash.
"Factory Fixes" is written by Jim DePalma, a 30-year veteran of the auto repair business who has served stints as a service manager, parts manager and ASE-certified technician. His column provides vehicle manufacturers' authentic factory technical service bulletins (TSBs) that have been condensed for easier reading. Mr. DePalma advises that techs always check with a dealer or repair information system for the latest revisions before starting to work on a vehicle. He can be reached via email at [email protected].