I had the issue of not knowing what was going on and was using my Aeroforce scanner gauge and a cheap handheld scan tool.While this lets you see some things and clear codes you can't change much, allows for e-fan control and something else.
So...I bought HPTuners...the same program my tuner uses. This allows me to use the scan feature and send it to him, and he sends me back a modified file to install. Makes tunes fairly painless and is teaching me about controlling it myself...for future projects.
I can highly recommend this....regardless of what program is involved...LS1Edit, HPTuners, EFILive, etc. HPTuners wasn't too expensive either (my tuner also sells them and gave me a discount)...around $500? Now GM tech II is a different thing altogether.
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Kurt -
'68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy
'72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close
'06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD
'18 Kia Sorento - wife's econo-driver
'95 Chevy S10 - reg cab shortbed, LS, 4.3, auto...
my '68's powertrain and chassis build -links broken
A surprise phase - carb to efi -links broken