Hi, I am trying to determine the correct GM service crimp tool for the 0.64 size JST brand terminals. I have a hunch it is J-38125-641 or J-38125-642, but I do not have access to GM ESI to verify this. The part numbers of the terminals in question are SNAC3-AO21T-M0.64 and SNAC3-AO31T-M0.64. I know the correct GM service extraction tool for these terminals is J-38125-553 (Delphi 15315247). These terminals are a bear to plug if not crimped exactly right! Thanks!