Idk how to create my own forum so I'm just gonna write this in this one , okay I have a 99 silverado 5.3 v8 4 speed auto 4x4 & just yesterday my trucks been acting weird when it's cold . I go to drive it I. The mornings and it would shift from 1st to 2nd around 10mph then it'll shift late to 3rd for some reason but it's only when the engines cold ? Why??
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