what transmission do I have in my stock 2003 h2? 4l80e? 4l85? or??? just wanted to know what it is so I can look up which tranny line is pressure line and which is return line, getting a trucool tranny cooler with bypass and hook up says "flow to cooler" and "flow to trans" assuming pressure line has to go in right spot for bypass to work

 

upon further review..one line from tranny goes into bottom of radiator and other line goes directly to cooler so im thinking the line that goes into radiator must be pressure (supply) line then out of radiator through cooler and back to tranny cant see it flowing through external cooler first then radiator then tranny.....anybody??