Oh Good! yeah the EBCM controls all 3 of those. if you have an ABS light, bye bye amenities lol. And you stated you couldn't get anything to come up on the scanner? if so that's a tall tail sign that the EBCM is fer sure deader than a door nail.
If/when you do pick up an EBCM they can only come out of another GTP cause of the magnasteer n shizzz
Let me know what conclusion you come to as I have a few here and would be happy to cut you a deal on one of mine
Oh also another trick to see if its bad is if youre going down the road and you shift into N the speedo will drop to 0 even if you're going say 35mph lol
