Resetting after an oil change - 1993 Chevrolet S-10 Blazer

do you mean by resetting oil service light?
if so, you may need an oil reset tool, like, oil reset tool add4310

good luck

How to Reset the Engine Oil Life System
The Engine Oil Life System calculates when to change the engine oil and filter based on vehicle use. Whenever the oil is changed, reset the system so it can calculate when the next oil change is required. If a situation occurs where the oil is changed prior to a CHANGE ENGINE OIL SOON message being turned on, reset the system.
Always reset the engine oil life to 100% after every oil change. It will not reset itself. To reset the Engine Oil Life System:
Display the OIL LIFE REMAINING on the DIC.
Press and hold the SET/RESET button on the DIC for more than five seconds. The oil life will change to 100%.
If the CHANGE ENGINE OIL SOON message comes back on when the vehicle is started, the Engine Oil Life System has not reset. Repeat the procedure.
Good luck and thanks for your question and I hope my suggestions help. burdfrenzy
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on a 2001 gm i believe you turn the ingition to the run position with the engine off and with-in 3 seconds step on gas pedal 3 times all the way to the floor. the message center should reset and go off. turn key off and then start car. to see if reset.sometimes you have to go slow 3 times to floor with gas pedal.MAKE SURE ENGINE IS NOT RUNNING WHEN YOU DO THE RESET.

hello, here is the instructions on how to reset the light

When the system has calculated that oil life has been diminished, it will indicate that an oil change is necessary. A CHANGE ENGINE OIL SOON message will come on. Change the engine oil as soon as possible within the next 600 miles (1000 km). It is possible that, if driving under the best conditions, the oil life may not indicate that an oil change is necessary for over a year. However, the engine oil and filter must be changed at least once a year and at this time the system must be reset.
If the system is ever reset accidentally, change the engine oil at 3000 miles (5000 km) since last oil change.
To reset the Engine Oil Life System, do the following:

1. Turn the ignition to ON, with the engine off.
2. Slowly fully press and release the accelerator pedal 3 times within 5 seconds.
The reset is complete when the chimes sound and the CHANGE OIL lamp goes out. If the lamp stays on and no chime is heard, repeat the reset procedure.

3. Turn the key to OFF.

If the CHANGE OIL lamp comes back on when the vehicle is started, the engine oil life system has not reset. Repeat the procedure.

Most often you need a code reader with a reset function that can connect to the computer jack under the dash and reset factory functions like that. Pain in the tush if you are changing your own oil. Mechanics and dealers have the equipment to do that reset.

1994-99 BUICK LESABRE
CHANGE OIL SOON Light
1. CHANGE OIL SOON light will come on when engine oil has broken down enough to require changing. After changing oil, reset oil life display.
2. To reset light, turn ignition on. Open glove box to access oil reset button. Press and hold oil reset button in glove box for at least 5 seconds, but not longer
than 60 seconds. The CHANGE OIL SOON light will flash 4 times to indicate light has been reset.

FIRST press and release the setup button to display oil life= xxx
then press and hold the reset button for about 2 sec it should then display oil life set to 100%
--------------------------------
Just pressing the reset button when the change oil light comes on while driving will not reset the computer

1. Press and release the SETUP button until the message center displays PRESS RESET AT OIL CHANGE.
2. Press and release the RESET button until the message center displays HOLD RESET TO CONFIRM.
3. Press and hold the RESET button for 2 seconds and release to reset the oil life to 100%.

In the owners manual, you will find reset procedures.

I found this for ya, hope it helps!

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Oil Change Reset
A press of the OIL CHANGE RESET switch will allow you to
reset the oil life feature to 100% (or your Personalized Oil Reset
Percentage). After you have the oil changed, you must execute
the following procedure. Press the OIL CHANGE RESET switch
and hold for five seconds as the M/C counts down for five
seconds. After a successful reset the Message Center will display
“OIL LIFE RESET TO 100%.” If you have established a
Personalized Oil Reset Percentage, the display will show that
percentage instead of 100%. To ensure accurate oil life
indicators, perform this reset procedure only after an oil change.
Your Personalized Oil Reset Percentage allows you to establish a
smaller oil change interval than the manufacturer’s
recommended interval. To establish your Personalized Oil Reset
Percentage perform the following procedure:
1. Press and hold the OIL CHANGE RESET switch and press
the RESET switch while the display is still counting down
the 5 seconds to reset. The display will change to “START
OIL LIFE AT XXX%.”
2. Press the OIL CHANGE RESET switch until the displayed
percentage is the Personalized Oil Reset Percentage that you
desire. Your choices are 100%, 90%, 80%, 70%, 60%, 50%,
40% and 30%.

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Oil Change Reset
A press of the OIL CHANGE RESET switch will allow you to
reset the oil life feature to 100% (or your Personalized Oil Reset
Percentage). After you have the oil changed, you must execute
the following procedure. Press the OIL CHANGE RESET switch
and hold for five seconds as the M/C counts down for five
seconds. After a successful reset the Message Center will display
“OIL LIFE RESET TO 100%.” If you have established a
Personalized Oil Reset Percentage, the display will show that
percentage instead of 100%. To ensure accurate oil life
indicators, perform this reset procedure only after an oil change.
Your Personalized Oil Reset Percentage allows you to establish a
smaller oil change interval than the manufacturer’s
recommended interval. To establish your Personalized Oil Reset
Percentage perform the following procedure:
1. Press and hold the OIL CHANGE RESET switch and press
the RESET switch while the display is still counting down
the 5 seconds to reset. The display will change to “START
OIL LIFE AT XXX%.”
2. Press the OIL CHANGE RESET switch until the displayed
percentage is the Personalized Oil Reset Percentage that you
desire. Your choices are 100%, 90%, 80%, 70%, 60%, 50%,
40% and 30%.