How do you reset the service engine soon light on a 1999 Pontiac Grand Am?

If its an OBDII system you can get it to go off by disconnecting the negative battery lead from the battery, leave it off for 10 minutes, reconnect and it should be off. Be aware if you do this you will lose all presets on radio etc.

Auto Zone may lend you a code reader that will reset the light. Otherwise its about a hundred buck for the cheapest one .

If the "service soon" is turn on, this is a warning about "maintenance time" (filter and fluids change); this warning light isn't the same that "check engine".

Hope helps.

The service engine soon light is an indicator /reminder for you to do some type of maintanence work on your vehicle, depending upon your mileage that you have accumulated on your car dictates the sort of maintanence needed on the car.
Can either be as simple as an oil change or as complicated as a major service/tuneup, oil change, transmission change, wheel alignment, brake inspect, tire rotation etc.
Once the work is performed the technician must turn off the light.
Reference the dealership or reliable repair shop for further information.

you can do it with a scan tool or disconnect the battery for a minute

Pontiac Grand Am, 1999-03
To reset the Change Oil light, open the driver’s side instrument fuse panel cover and turn ignition on engine OFF. Press the RESET button and release. The change oil indicator light will flash. Press the button again and the system will be reset.

Good luck and happy new years.

There are many things that can cause the light to come on. Generally if it is serious most 'check engine' or 'service engine' lights will blink. The simplest (and cheapest) method to diagnose the problem is to take the car to AutoZone and they will read the computer codes free of charge and tell you exactly what it is (such as the oxygen sensor got a bad reading and needs a reset, or its time for an oil change... etc.)

sounds like you have a vent valve problem, po440 is that something is wrong with evap system, which vent valve is part of, start by checking that first make sure its not blocked with spider webing,good luck.

The service light means something is wrong with the car and it needs attention now. Get the codes checked and that will tell you what is wrong with it.

what is the procedure you are using can you explain it to me?
Resetting Procedure

To reset the CHANGE OIL SOON indicator if equipped with the Driver Information Center (DIC).

1. Turn the ignition to ON without starting the engine.
2. Fully press and release the accelerator pedal three times within five seconds.

• If the CHANGE OIL SOON indicator flashes two times, the system is resetting. Turn the ignition key to OFF then start the vehicle.
• If the CHANGE OIL SOON indicator comes on and stays on, repeat the procedure.

To reset the OIL LIFE indicator if equipped with a Trip Computer.

1. Press the trip MODE button until the light appears next to OIL LIFE.
2. Press and hold the trip RESET button until the oil life percentage changes to 100%.

Hope this helps Ill look into the ABS lights but I do believe that you will need a scan tool to retreive a code to be able to diagnose the reason for the lights