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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