I asked the dealer this same question and the answer is, it doesn't come off. The only way to replace the knob is cutting it off. Actually, to remove the shifter knob on a 2001 Saturn SC2, all you have to do is pull it straight off the shaft. It does not twist or turn. Just pull it straight off. No need to cut it. You shouldn't even need any tools.
Replace the bulb behind it
On some cars you have to replace the whole headlight, but in a lot of cars you replace just the bulb. At the back of the headlight, see if you can twist out the bulb socket. You may depress it while twisting it counterclockwise.
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Replace the blinker relay, located on the fuse panel. Buy it at any automotive parts dealer.
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To replace the license plate bulb on a 2007 Saturn Ion, first, open the trunk and locate the light assembly. Use a flathead screwdriver to gently pry off the lens cover. Remove the old bulb by twisting it counterclockwise, then insert the new bulb in its place and twist it clockwise to secure. Finally, snap the lens cover back on and close the trunk.
Check the thermostat meke be sticking replace it ita cheap easy try!
To replace the license plate lamps on a 2006 Saturn Vue, first, open the rear hatch and locate the lamp assembly. Use a flathead screwdriver to gently pry out the lamp housing from its slot. Remove the old bulb by twisting it counterclockwise, then insert the new bulb and secure the housing back in place. Finally, test the new bulbs to ensure they are functioning properly.