So out of the blue my 05 equinox starts to have a garggling sound as if my cat is gutted. I pop the hood to hear a clicking coming from what looks like the distribution block ( all the spark plugs wires are plugged into this). I run the codes and get a engine missfire, and generator lamp control circuit. I call cheavy to try and order this distribution block and they dont know what Im talking about (they can only run by codes). I give them the codes and the service tech tells me the generator lamp is in the alternator. Alternator is 538. I order the alternator change it only to see no improvements. My car is still misfiring. I cant find out the name of this part anywhere at all and honestly don't now where to go from here. car garggles and hesitates at low rpms (under 3k) anything above that car drives fine. engine code p300, p0621. any help is greatly appreciated. My warranty is up so I'm in this alone and with the terrible help Im getting from chevy I don't know where to turn.