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1999 cadillac sts over charging
on the positive battery cable under back seat is a red device with small orange and bule wires called a thermister controls alt output.this device is no longer availible from gm good news is you can buy a resistor of 1600 ohms from radio shack for lees than a dollar plug it in to connector instead of the thermistor and chargeing goes back to normal. radio, windows ,cruise, control should go back normal also
on Dec 08, 2013
Hard to say.
The codes in the 100 and 300 range could be fuel related, but you would have to check the specific codes one at a time to find out.
on May 05, 2013
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