New to forum and have a question. When I start my truck, the volt meter starts out low...say 11 volts, then slowly goes up as I drive. If I drive it awhile, stop somewhere and restart it, it goes up to normal. NOW, on my 93 K2500HD gas beast, my volt meter goes right up to normal as soon as I start it. Is this normal for a diesel? It seems to run fine, no lights or warnings. It has 21k on it and runs awesome....