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Q: Need help finding out why my 2007 Silverado is stalling while braking. on 2007 Chevrolet Silverado 1500

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I have a 2007 Chevy Silverado with 82k miles on the 5.3L V8 motor w/ automatic transmission. I've had a problem with it stalling recently. It seems to happen mostly when the engine isn't "warm" yet, and I'm braking into a turn at low speeds. This morning it stalled while making a left turn out of my neighborhood doing aprox 10-15 miles per hour. I slipped it into Neutral, and restarted it while rolling. Drove another 100yds and it stalled again as I was breaking at a stop sign. then drove it another 30 minutes stopping and going many times, and it never stalled. What could it be?
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could be idle air control going bad but try cleaning the throttle body to start with. use a good throttle body cleaner or have it done.
Try retorquing intake and check for other vacuum leak(s). Intake may reseal after expanding from warm up!
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