extreme starting problems

[chevy3504]

i have a 2000 xtreme that starts but dies instantly i can keep it running with my foot on the gas after about 1 minute it idles fin it has plenty of power runs great other than this it only happens 35% of the time other times it start fine

[dmbrisket 51]

go to autozone, ill put money that your alt either going bad, or maby a bad connection from it, but either way it has drained your battery down to next to nothing and now this is where you are

[chevy3504]

i don"T think its battery related the truck cranks with no problem

[busa_4]

check your idle control motor. it might be clogged with carbon or not working at all. have the computer scanned to see if there are any codes in memory.