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2002 chevy trailblazer_ltz
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Discussion Starter · #1 ·
Especially when cold, whenever my truck shifts from first to second, it needs to be above 3k rpm, which occasionally causes a hard shift. Whenever I drive I need to let of the gas and make it shift myself. My first thought was vaccuum leak or solenoids, but does anyone have any other ideas for why this is happening.
 
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