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additional transmission cooler 2004 Trailblazer

06-22-2010, 01:57 PM
I would like to install an additional transmission cooler for our big 10 state tour this summer towing our camper. I need to know which line at the bottom of the radiator is the return to the transmission line. I Can't find a single illustration showing me the right one.


06-22-2010, 06:12 PM
One way to tell is the return line is noticeably cooler. Should be the l/s though.

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