I'm trying to get a straight answer as to what the blue connector pin 33 is responsible for on an LS1B computer. Both the F body and trucks have it and I am aware that it is used for TCC unlocking on an automatic trans vehicle. My question is does a manual trans use this pin for anything? Does the computer want to know when the brake is on for any sort of deceleration function (both in an auto and manual)? Is it purely for TCC unlock on an auto and nothing else??? I've asked this question to a few different people and have gotten a few different answers.