Review on Air Door Actuator - Replaces OEM 89018365, 604-106, 52402588 - Compatible with Chevrolet, Chevy, GMC 1994-2012 - Silverado 1500 and 2500, Tahoe, Sierra - HVAC Blend Control Actuator - Heater Blend Door by Leslie Matlak

This fits my 05 Silverado easily and didn't take long to install. It was a drive directly below the manual controls for air conditioning and heating, but below it, like an ashtray. On my truck, the driver's side air vents started to heat up after a few minutes of running with the A/C on cold. This part solved the problem and is now working correctly. This drive is a 5 pin connector. There was a process of removing and replacing the fuse to calibrate the part. Works great and has a lifetime guarantee.