Service soon light on and code 52

52 is the battery disconnect code. Your doing that to get rid of the code.to clear the computershim and him and by holding down the off and low buttons until you see 00.Then push the off and high buttons until you see 00 then both computers will be cleared.

Hi,

To answer your question, Code 52 indicates that the "long term" memory in the ECM has been reset. This will be the case whenever power is removed from the ECM (i.e. disconnecting battery cables, disconnecting P-1 (blue) ECM connector, etc.) This code should be "cleared" from memory after restoring the ECM's power supply.

Now what that means is battery power was lost for enough time for the ECM to lose memory. If you disconnected the battery trying to reset the light, that would have caused the code.

However, that doesn't explain why the engine stalled and the light is on. What I suggest is to scan the computer to determine what new codes are now stored. This vehicle has an OBD1 diagnostic system. It doesn't require a scanner to retrieve codes. All that will be needed is a short jumper wire or even a paper clip. Here is a link that explains how it works.

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Once you do this, let me know what codes were retrieved. Also, you asked if it was safe to drive. Take a look through these links. They discuss your concerns.

https://www.2carpros.com/articles/check-engine-light-top-ten-reasons

https://www.2carpros.com/articles/check-engine-light-top-ten-reasons

https://www.2carpros.com/articles/check-engine-light-is-it-safe-to-drive

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Let me know if this helps or if you have other questions.

Take care,
Joe