I couldn't find anything related to the heat actuator replacement in the Equinox service manual but assuming you have bored out the hole by now to make it fit, I did find a calibration step that should be performed before touching anything in the heating, defrost and A/C section of air distribution. Here is a paste from the GM service manual;
Prior to or after any replacement of HVAC components including A/C compressor make sure to calibrate HVAC module using the following procedure. 1. - Calibrate the HVAC control by simultaneously depressing the A/C and re-circulation buttons three times in a period of less than two seconds, allow 15 seconds to complete calibration. Perform with ignition on. 2. - Verify A/C and re-circulation LEDs are flashing during calibration 3. - After calibration is complete, depress A/C or re-circulation button and make sure the LED state changes and all modes operate properly (if lit, LED will be off after button is cycled or vice-versa). If state does not change, follow published diagnosis.)
Answers & Comments
I couldn't find anything related to the heat actuator replacement in the Equinox service manual but assuming you have bored out the hole by now to make it fit, I did find a calibration step that should be performed before touching anything in the heating, defrost and A/C section of air distribution. Here is a paste from the GM service manual;
Prior to or after any replacement of HVAC components including A/C compressor make sure to calibrate HVAC module using the following procedure.
1. - Calibrate the HVAC control by simultaneously depressing the A/C and re-circulation buttons three times in a period of less than two seconds, allow 15 seconds to complete calibration. Perform with ignition on.
2. - Verify A/C and re-circulation LEDs are flashing during calibration
3. - After calibration is complete, depress A/C or re-circulation button and make sure the LED state changes and all modes operate properly (if lit, LED will be off after button is cycled or vice-versa). If state does not change, follow published diagnosis.)