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a.ralston06

a.rals ... 11/20/2012

1999 GMC Yukon SLE 8 Cyl 5.7L

Brakes

What is causing my truck to idle down when applying the brakes?

sitting in park i apply the the brake and my engine drops idle speed from around 700 to about 4... the harder i apply, the lower it drops. what could it be?

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