The Tune Saver is a backup power source for your car's stock computer so it will keep it's memory if the battery dies or is disconnected. Not for the ecu-GN aftermarket ECU. This has nothing to do with the tune programmed onto your chip, as that cannot be erased. This enables the ECM to remember any learned data (BLM), or user parameters, if you have an adjustable chip. Designed for a Turbo Buick with stock computer, but could be used on other cars with tweaks to the wiring. It is plug and play on the Buick, and installs into the single orange wire for the ECM's memory. We normally place it under the MAP sensor, and run the wires down towards the battery.