Driving home today I noticed my voltage guage was running alot lower than normal. Turned off A/C and radio and it climbed a little but not back to where it normally runs. Checked voltage when I got home and had 13.5 volts with all accessories turned off, 13.2 with A/C and radio on. Is this normal range for the voltage output? To compare it to another vehicles voltage output, I checked my 07 Grand Prix and it was putting out 13.9 with A/C and radio on. Any help would be greatly appreciated.
