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2001 silverado 1500 tranny flush or fill?

wazzabie

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I'm trying to decide if I should flush out all the fluid or just drain and fill what is in the tranny pan. There is about 3 quarts I removed from the pan by removing the tranny plug bolt. This is a 4l60e.
 
fill do it 2x, 3x. fill get it hot, drain hot. Drop pan and replace filter and filter seal the finial time.

Unless you have access to a flush machine, or ok with huge mess. Still do a new filter. Remember Cavitation kills.
 
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