Well, Superblack’s battery not only went dead on me as it did the other day while I had the door open for awhile, it did the same thing to my tech bud yesterday. We know it’s not the battery (which is brand new) so apparently the car’s voltage gauge was in fact operating properly when it showed it below 12 volts while idling. Checking the charging at the battery clamps showed at idle a charge coming in from the alt. of only 11 volts. Worse, the incoming amperage was only 27 or so amps. Since the belt seems nice and tight, seems the only thing that could be going on is a bad alternator. Everyone agree as to that conclusion?
Good news is the rebuilt alts for the 5.3 are only $135 at two local suspects (plus core charge). My tech isn’t too happy b/c he thinks r/ring it is a bit involved, but I looked at the factory service manual directions and actually it seems pretty simple to me, even simpler than that for the 4.0s (go figure ) … He seems to think that the air injection pump has to also be removed to get at the alt. (and two belts), but the manual doesn’t seem to indicate that. ?