Computer Interface

I know there are some companies that make equipment that plugs into your vehicle computer so that you can make adjustments. Superchip is one. What
I'm trying to find out, is there anyone that makes software for a laptop and an interface cable to hook it to a vehicle so that you can make adjustments to the onboard computer?
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Depends on the year. Best out there for ls1 engines is hptuners.

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