97 Yukon won’t stay running
I have a 1997 GMC Yukon that I recently
started driving and hauling metal with. It ran
out of transmission fluid today then wouldn’t
turn over after I got some and put it in there. I
had the battery hooked up to a jumper box
that’s fully charged and waited till the interior
lights were their normal brightness and tried
to start it. I was able to get it started but
almost as soon as I disconnected the jumper
box, it died again. I hooked it back up and
waited about an hour or so and tried again.
Same results except that it died while still
being hooked up. The alternator is about a
year old and the battery is less than 2 weeks
old. I don’t know what to do. Any ideas?