I own a Saturn L300 - we even called the Saturn dealer - the best thing to do is to scrap the old radio and have a new one installed. Whether you choose to do that through the Saturn dealer or elsewhere (recomend elsewhere) is up to you.
Pop the front bezel off with a flat blade screwdriver (just prys right off) Then use a 7mm socket to remove the 2 bolts on either side of the radio and then it slides right out. Unplug the main...
If it says loc you have to remove power for an hour until it flashes a 4 line. to get a code you then have to hold down the 3/4 buttons until it displays...then call your dealer with that code.
With all the vehicles i have had, the intructions were in the owners manual for the car. If You haven't already checked.
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The instructions in the manual are not completely correct. The procedure...
try this website below (copy & paste). worked for my daughter's radio. do a web search and there are several that won't ask for $$ to furnish codes. good...