# 2009 GMC Sierra 1500 - Oil consumption and one bad plug

**URL:** <https://community.cartalk.com/t/2009-gmc-sierra-1500-oil-consumption-and-one-bad-plug/162654>\
**Category:** Maintenance/Repairs\
**Tags:** gmc\
**Created:** [April 9, 2020, 3:38pm UTC](https://community.cartalk.com/t/2009-gmc-sierra-1500-oil-consumption-and-one-bad-plug/162654 "2020-04-09T15:38:21Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![William19](https://avatars.discourse-cdn.com/v4/letter/w/e19b73/32.png) [@William19](https://community.cartalk.com/u/William19)\
**Post date:** [April 9, 2020, 3:38pm UTC](https://community.cartalk.com/t/2009-gmc-sierra-1500-oil-consumption-and-one-bad-plug/162654/1 "2020-04-09T15:38:21Z")

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Oil consumption and number 7 spark plug fouling

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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:** [April 9, 2020, 5:49pm UTC](https://community.cartalk.com/t/2009-gmc-sierra-1500-oil-consumption-and-one-bad-plug/162654/2 "2020-04-09T17:49:04Z")

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The rings for #7 are probably bad. How severe is the oil consumption? A quart in 500 miles? 250 miles?

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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:** [April 9, 2020, 5:57pm UTC](https://community.cartalk.com/t/2009-gmc-sierra-1500-oil-consumption-and-one-bad-plug/162654/3 "2020-04-09T17:57:12Z")

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Compression test needed. Is #7 firing?