i now have the my new vortec 350 up and running in my jeep however the alt. isn't charging. i have had it tested and it is good. i put another alt. on and it didn't charge either, i have made sure the eng is grounded to the frame and the eng. to the body and nothing. the only two wires to this alt. (99 gm) are the lead to the battery and the exciter wire whick is recieving voltage. i am lost! if the exciter wire is feeding voltage then the alt. should be creating voltage right??? my wife has a 99 tahoe with the same motor and everything is the same. just two wires the batt. charge wire and the exciter wire. there is one difference i have found. if it is running and i put the negative lead of my m/meter to the neg. post on the battery and the positve lead to the alt. housing mine reads .007-.009 vdc and when i checked the one on my wifes it had like -.014 vdc. i am supposed to be going to clayton this coming weekend and i can't figure this out. i have gone over and over it. any help would be greatly appreciated!!!