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Thanks will start with that

Hi,
I have installed an LS3 with 6L80E , GMPP control. Can?t figure out what?s wrong. I have the LS3 3ngine running but no map ,maf , rpm or fuel trim signal. also shifts hard into drive and reverse...

LS3 3ngine running but no map ,maf , rpm or fuel trim signal. also shifts hard into drive and reverse - any ideas

Hi,
I am a total novice and can?t figure out why I can?t read some sensor signal but get others. I am doing an LS3 install with a GMPP ECM. I can read signals on the throttle position but not...