barbakos

Has anyone figured this out? 2008 suburban ltz 6.0 with same symptoms. Replaced mega fuse and cleaned contacts, two new alternators, new battery, battery cables are good. Issue was intermittent, seemed to be heat related, now constant. Will not charge at all. Voltage drop from battery to alternator is .15 which seems fine. Good ground to alternator bracket, engine and firewall. Replaced pigtail on top of alternator as well but to no avail.