S light is going off and on.
when light is on car won't go. when light go off car will go.just had a thermostat put in car after this, this started happening.
http://www.cargurus.com/Cars/Discussion-t3800_ds491821 -- check this out
http://www.cadillacforums.com/forums/cadillac-catera-cimarron- forum/255880-2000-catera-disable-trani-check-s.html -- or maybe this
http://www.cadillacforums.com/forums/cadillac-catera-cimarron- forum/219350-trans-s-light-flashing-skips-2nd-2.html -- trans fluid and filter change might help
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