That sounds fancy- what does it do?
Found via Google..
Many vehicles currently incorporate an afterblow function within the HVAC control module software. The afterblow feature, when enabled, employs the HVAC blower fan to dry the evaporator after vehicle shutdown, and this function will inhibit microbial growth. Technicians are to confirm that the customer concern is evaporator core odor and that the vehicle has the imbedded afterblow feature, as defined in the SI document for that specific vehicle model, model year and specific HVAC option. Refer to SI for enabling the afterblow function. Vehicles in areas prone to high humidity conditions may benefit from having the afterblow-enabled calibration installed prior to any customer comment.
When afterblow has been enabled by the scan tool the blower motor will operate at 68 percent blower speed for 2 minutes 30 seconds to 4 minutes after the engine has been in Key OFF for 30 minutes.
The following conditions must be met for the HVAC module to operate the afterblow:
• The outside air temperature must be at least 21°C (70°F).
• The A/C compressor must have operated during the latest key cycle.
• The engine must be turned off for at least 30 minutes.
• The system voltage must be at least 12 volts.