Good morning to all. I have just recently purchases an 01 Silverado, rock stock, 4x4, 6.6 and just love to drive it. I have noticed however, that when I start up, the ammeter wil stay around 12.5 volts for about 30 seconds, then climb to 14+ over about 3 seconds. Is this normal? Others have said don't worry about it. But if it is a problem it needs fixed before winter. Has new sealed batteries. Replace regulator? Bad grounds perhaps? Have another beer and forget about it? What are your thoughts? Thanks Ed