Review on Air Blend Door Actuator Replacement for Chevrolet/GMC, OE: 89018365, 604-106, 52402588 - Compatible with 1994-2012 Silverado 1500 & 2500, Tahoe, Sierra - HVAC Heater Blend Control Motor by Star Bell

Installation documents are neither in writing nor in pictures. I disassembled 80% of the dashboard including the entire glove box, ashtray assembly and the main heater control unit. And I still can't find this Master Blend door controller. I'll take the radio off to see if it helps with my search, but all the specs I've looked at so far haven't helped at all! The GM dealer parts department will next see if they can locate this part. Location.