6.5L amp meter

[tcraw1020]

I have a small red lite on my ampmeter and the alternator is slow to reach 12 volts any ideas, just brought the truck and not used to diesels

 

[Chevy1925]

sounds like your alternator died. make model and year of the truck would help (yes i know its a 6.5 diesel)

 

[TheBac]

Bad alternator.