[mountainbiker]

PCMforLess has 3 purchase options: (1) core exchange, (2) loaner, or (3) send in. ONLY option (1) requires the CASE relearn. With the core exchange option, you remove your PCM, install the new PCM, and send back your old PCM (if you want a small core refund). With the core exchange, the check engine light IS disabled, so it isn't an eye sore but it still needs to be done (about a 5 minute process with the Tech II scan tool). With option (2) and (3), no CASE relearn is needed -- unless they cannot get the info off of your current PCM. I have and recommend the improvement (and it is easy to install).