#tcm #silverado #transmissioncontrolmodule
Apparently GM has increased the “security” on the 8L90 and 10L90 automatic transmissions in Camaro and Trucks... Now you have to send them out to be unlocked for tuning....weak!!!! We sent this one to HPTuners to be unlocked. They were great! Very fast turn around and shipping was fair being that we had to Overnight it back to us. This cost $189 as of the summer of 2020. HPTuners did say they are working to unlock the code so the tuners using their software can tune the transmissionon site.
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