Why is the right side passenger side heat and ac not working

Asked by ALDannels Apr 07, 2022 at 04:22 AM about the 2019 GMC Yukon Denali RWD

Question type: Maintenance & Repair

during day time its hot outside and the right side blow hot while ac is running on and then later at night outside is start chill and I turn temp up to warm while ac is running and then right side blow cold not warm...

1 Answer
307,225

Gene answered 2 years ago

HVAC control module is messed up, the dealer maybe able to reprogram it but usually they need replaced.

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