1. Clear all DTCs 2. Place the ignition switch to the OFF position. 3. Disconnect the scan tool. 4. Install the motor assembly. 5. Re-connect all previously disconnected components. 6. Remove the HVAC/ECAS fuse for a minimum of 10 seconds. 7. Re-install the HVAC/ECAS fuse. 8. Start the vehicle. 9. Wait 40 seconds for the HVAC control module to re-calibrate. 10. Verify that no DTCs have set as current DTCs. This is how to reset the A/C without the gm scantool. Try this out.
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Thursday, May 13th, 2021 AT 6:55 PM