# 2010 GMC Terrain - Reduced power

**URL:** <https://community.cartalk.com/t/2010-gmc-terrain-reduced-power/198654>\
**Category:** Maintenance/Repairs\
**Tags:** gmc\
**Created:** [January 10, 2025, 12:23pm UTC](https://community.cartalk.com/t/2010-gmc-terrain-reduced-power/198654 "2025-01-10T12:23:42Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jack40](https://avatars.discourse-cdn.com/v4/letter/j/c37758/32.png) [@jack40](https://community.cartalk.com/u/jack40)\
**Post date:** [January 10, 2025, 12:23pm UTC](https://community.cartalk.com/t/2010-gmc-terrain-reduced-power/198654/1 "2025-01-10T12:23:42Z")

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engine power is reduced and dont start rpm not working good t.y…

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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:** [January 10, 2025, 1:05pm UTC](https://community.cartalk.com/t/2010-gmc-terrain-reduced-power/198654/2 "2025-01-10T13:05:02Z")

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> [@jack40](#):
>
> rpm not working good

Curious, what is your native language and where do you live?

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**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\
**Post date:** [January 10, 2025, 9:58pm UTC](https://community.cartalk.com/t/2010-gmc-terrain-reduced-power/198654/3 "2025-01-10T21:58:07Z")

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I presume you mean the Terrain’s symptoms are (1) the engine power is reduced for no apparent reason; (2) the engine doesn’t start reliably; and (3) the rpm display seems abnormal.

Suggest to add some more info

- Are any dashboard warning lights on. If so, are they on all the time or intermittent?
- Under what conditions doesn’t it start, typically? Cold start, first start in the AM? Or warm start, like after you stop by 7-11 for a big gulp?
- Detail how the rpm display isn’t matching your expectations. Is it doing something it shouldn’t, or is it not doing something it should?
- 

You’ll probably get better help here if you ask a native English speaker to edit your posts before posting, for clarity.