If you have a '93, you'll also need a memory adapter to piggyback new chips onto your existing PCM ($35), a chip burner/eraser ($85) and blank chips ($5), as their PCMs are not flashed based. For a '94, you'll need the 12-pin connector for a '95, you'll need the 16-pin OBDII-style connector, but it's still OBDI protocol. These can be bought from OBD Diagnostics, Inc. Second, you'll need the appropriate cable connector to go from your car to a computer. Your other (free) option is to use EEHack for flashing and data-logging, and TunerPro RT plus the appropriate XDF (EE or DA2/3) for your PCM to do the tune editing. You'll also need an additional PCM file: $EE for the '94-'95 LT1/L99 $DA3 for the '93 LT1 F-Body or $DA2 for the '92-'93 Y-Body (Corvette), which will cost you an additional $19.95 from TunerCat. It is a great program, also known as Computer Automotive Tuning Systems (C.A.T.S.), which allows the above things to be done, all for only $69.95. TunerCat is your first step, the program I recommend to read your current PCM image, change its contents, and then reupload it to your PCM. There are three basic items necessary to tuning your own LT1 (or other GM) PCM: After payment, the 20+ page printable PDF of these free online tips will be emailed to you.
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