# 2015 GMC Sierra 1500 blows heat in one side

**URL:** <https://community.cartalk.com/t/2015-gmc-sierra-1500-blows-heat-in-one-side/128070>\
**Category:** Maintenance/Repairs\
**Tags:** sierra1500, gmc\
**Created:** [November 2, 2018, 3:11am UTC](https://community.cartalk.com/t/2015-gmc-sierra-1500-blows-heat-in-one-side/128070 "2018-11-02T03:11:08Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Causey](https://avatars.discourse-cdn.com/v4/letter/c/ce73a5/32.png) [@Causey](https://community.cartalk.com/u/Causey)\
**Post date:** [November 2, 2018, 3:11am UTC](https://community.cartalk.com/t/2015-gmc-sierra-1500-blows-heat-in-one-side/128070/1 "2018-11-02T03:11:08Z")

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My GMC blows cold air from driver and center vents when the setting is on heat. the right vent blows heat… what does this mean .

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**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [November 2, 2018, 11:55am UTC](https://community.cartalk.com/t/2015-gmc-sierra-1500-blows-heat-in-one-side/128070/2 "2018-11-02T11:55:57Z")

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If this is a new problem, generally it is the fault of one of the actuators in your HVAC system. There probably is a YouTube video on steps to repair/replace the mechanism.