# 2015 GMC Sierra 1500 shakes at low speeds

**URL:** <https://community.cartalk.com/t/2015-gmc-sierra-1500-shakes-at-low-speeds/175275>\
**Category:** Maintenance/Repairs\
**Tags:** sierra1500, gmc\
**Created:** [February 18, 2021, 11:03pm UTC](https://community.cartalk.com/t/2015-gmc-sierra-1500-shakes-at-low-speeds/175275 "2021-02-18T23:03:14Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![rwj](https://avatars.discourse-cdn.com/v4/letter/r/958977/32.png) [@rwj](https://community.cartalk.com/u/rwj)\
**Post date:** [February 18, 2021, 11:03pm UTC](https://community.cartalk.com/t/2015-gmc-sierra-1500-shakes-at-low-speeds/175275/1 "2021-02-18T23:03:15Z")

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shaking or vibrating at low speeds almost flat ground(about 20 mph) also shaking while sitting at stop light.

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**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [February 20, 2021, 2:35am UTC](https://community.cartalk.com/t/2015-gmc-sierra-1500-shakes-at-low-speeds/175275/2 "2021-02-20T02:35:37Z")

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You should have a mechanic look at that.

When you talk to them, explain more fully. What you’ve posted here isn’t going to help much.

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**Author:** ![davepsinbox\_157004](https://avatars.discourse-cdn.com/v4/letter/d/73ab20/32.png) [@davepsinbox\_157004](https://community.cartalk.com/u/davepsinbox_157004)\
**Post date:** [February 20, 2021, 10:37pm UTC](https://community.cartalk.com/t/2015-gmc-sierra-1500-shakes-at-low-speeds/175275/3 "2021-02-20T22:37:05Z")

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Just a wild guess but a rough idle will do that. A rough running engine tends to smooth out at higher RPMs. A bad idle air control valve will cause that, as will poor compression in one or more cylinders. Has the check engine light come on? A good mechanic with hands on the vehicle can diagnose whatever’s wrong.