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no start code 1638

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Old May 6th, 2012, 10:42 PM
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Exclamation no start code 1638
i have a 2001 silverado that wont start . i have fuel spark and good compression hooked up my obd 2 and it gave me p1638 which is my alternator. but shouldnt it start from a boost any way? it will turn over all day but no sign of life at all. could i have a ecm problem without throwing a code?? please help.
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Old May 6th, 2012, 11:48 PM
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Take alt to advance I bet its bad if its that shot it could make u not start
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