# Loud grinding when using heat

**URL:** <https://community.cartalk.com/t/loud-grinding-when-using-heat/128073>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, traverse\
**Created:** [November 2, 2018, 4:38am UTC](https://community.cartalk.com/t/loud-grinding-when-using-heat/128073 "2018-11-02T04:38:41Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Leonard39](https://avatars.discourse-cdn.com/v4/letter/l/f9ae1b/32.png) [@Leonard39](https://community.cartalk.com/u/Leonard39)\
**Post date:** [November 2, 2018, 4:38am UTC](https://community.cartalk.com/t/loud-grinding-when-using-heat/128073/1 "2018-11-02T04:38:41Z")

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Lots of problems with my 2010 Traverse. Loud grinding noise and vibration from under the hood when I turn on the heater, NOT A/C. For the last year Traction control, stabilitrak lights come all the time and all Classic Chevy keeps telling me is its Mass Air Flow sensor which I have replaced 2 times now and still having same problem. Last problem is when I start the car display reads Engine Hot A/C off and the temp gauge don’t work, and the fans run on high and WONT shut off. I replaced the cooling temp sensor already but still does it. I HATE this traverse