[gitpicker1954]

I also have a 2005 Envoy. The headlights dim and the blower fan for the heater slows down and the dash lights dim. At the same time the ammeter drops about 3 amps. I have had the battery replaced and the alternator replaced. But to no avail. Have you found a solution to the problem. Actually it has become a dangerous situation. People think that I am flashing my lights at them signalling them to go first at a four way stop!