[vteco]

I was able to briefly test the new Jet DST tuner/programmer today by reading the Silverado's VCM. This creates a file on your laptop that you can look at using the software they provide, and you can change parameters.

If you do change them, you can write that out to a modified computer file. And if you want to write that new configuration to the VCM, you can do that with a second included JET program.

Right now I'm just studying the original settings on my laptop. I've noticed something I think is a program error, so I've written to JET about that. It relates to pulses per revolution of a speed sensor.

I also noticed that my tank size is listed as 16.7 gallons, when everything I can find on the internet says that a 1996 Silverado K1500 has a 26 gallon stock fuel tank.

I also see that the tire diameter shown in the VCM is a little off, which might (or might not) account for my speedometer reading about 3mph low @35 mph (as measured by local radar speed signs).

There is a ton of information to learn from the settings data I can see now. I'm not anxious to change anything yet, but very interested to understand the parameters I'm seeing. There are hundreds, maybe thousands, including the tables.

It's really interesting!