# Brake booster

**URL:** <https://community.cartalk.com/t/brake-booster/23291>\
**Category:** Maintenance/Repairs\
**Created:** [December 11, 2008, 10:03pm UTC](https://community.cartalk.com/t/brake-booster/23291 "2008-12-11T22:03:10Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Glenna\_Chernoff](https://avatars.discourse-cdn.com/v4/letter/g/a698b9/32.png) [@Glenna\_Chernoff](https://community.cartalk.com/u/Glenna_Chernoff)\
**Post date:** [December 11, 2008, 10:03pm UTC](https://community.cartalk.com/t/brake-booster/23291/1 "2008-12-11T22:03:10Z")

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'97 GMC 1/2 ton pickup V8 1500. Complete Electric Diagnostic test done to determine why truck stalls &/or dies at stop lights in the evening. Occassionally starts rough, as well. Have been told the electric diagnostic test results showed that a brake booster was the problem. My question: can a brake booster cause the truck to stall or die?

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**Author:** ![pleasedodgevan](https://avatars.discourse-cdn.com/v4/letter/p/51bf81/32.png) [@pleasedodgevan](https://community.cartalk.com/u/pleasedodgevan)\
**Post date:** [December 11, 2008, 10:48pm UTC](https://community.cartalk.com/t/brake-booster/23291/2 "2008-12-11T22:48:50Z")

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Also play dead and stay dead. Stalling and stumbling and any other condition of running strange. Vacuum loss can do things.

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**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\
**Post date:** [December 11, 2008, 11:32pm UTC](https://community.cartalk.com/t/brake-booster/23291/3 "2008-12-11T23:32:52Z")

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I don’t see how a “electric diagnostic test” (is this a code scan?) led to this diagnosis.

You can disconnect the vacuum source to the boster and cap it off to see if the problem goes away.

Did you have a “check engine” light? any codes? current or history?