In additon to the primary battery cable, there should be a smaller wire attached to the post clamp. You need to make sure that the wire is securely connected and that the terminal connectors are clean. If the wire is loose or the connectors are corroded, the battery charge level is not going to be detected properly.
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your battery is so dead and or shorted it won't allow enough current to keep the truck running it could be a wire ground or positive not allowing enough current take the battery back to the place of purchase and have it tested it should be under warranty.I wouldn't try to start it by jumping it anymore try a fresh hot battery I think it will fix it
The alternator is most likely the problem, it isn't putting out enough of amps to charge the battery, but enough to keep it going which won't last long. Before assuming the battery or alternator, try your battery connections for corrosion or tightness. If you live close to an auto parts store they can check the battery and alternator to see which is the problem. The battery will not hold up long if running lights at night or other power consuming things.
Check the voltage ot the battery when the light is on. Ity should be approx 13.6 volts. If its around 12 volts, the alternator isnt charging. BUT just beacause it isnt charging, doesnt mean its bad, wirng has to be verified good, and connection.
This is my second oldsmobile i have owned. Now there is two positive connections right above where the battery is make sure they are free of rust and they are tight be careful not to over tighten nuts. Oldsmobile's are terrible for those external positive posts.
Try disconnecting the battery (unhook on of the terminals) wait for like 15 mins, hook the terminal once again and start the car. I also own a 2003 Jetta and once my engine light would come on after 2 mins of driving. Disconnecting the battery is like resetting the computer and hopefully the sensor.