I changed the a/c filter and have been trying to reset the light which says a/c filter change required but it won't reset. Can't understand why because I press reset as soon as it comes up but the status items just keep going.

Some systems require resetting if you dont have a tool to do this then disconnecting the batterry for about 10 seconds should do it.

Go back to the dealer and tell them to reset the light. Then didn't do it after the oil change

no that is way to much. it is only 1 hour labor

You can find the procedure to reset the light here

https://resetoillight.com/buick/oil-change-light-reset-buick-century-1994-1995-1996-1997-1998-1999-2000-2001-2002-2003-2004/

it wont go away because their is a mechanical problem and or problem with oil change [ not enough oil wrong filter etc ] will need to have vehicle scanned for the fault code to determine the problem most auto stores offer this service for free

could all be from the fact that the battery is dead

• That light is an indicator that the required miles have been drove and it's time to do an oil change. The light should be reset after every oil change as the computer keeps track of the miles to warn you when it's time again should you forget.

• If you want to turn the light off then follow these steps.

• Push and hold the trip button and then turn the ignition to on while holding the trip reset button. Keep holding for 10 seconds and the maintenance required light will go offf.

Regards, Tony

Hi.

The light means that the maintenance interval is over and that service is required. The procedure to turns off the light is reported on the owners manual but you are strongly advised to do service at intervals prescribed by manufacturer. Service will consist in oil change, fluids change, filters and general inspection.

Here the general procedure to reset service light.

1. Turn the ignition key to the 'OFF' position with the trip meter A reading shown.

2. Turn the ignition key to the 'ON' position while holding down the trip meter 'RESET' button.

Hold down the knob for at least 5 seconds. The odometer indicates '000000' and the light goes off.

Perform service as soon as possible.

Regards.

Ginko

If i understand you right the truck has been sitting for two years.If it has been sitting that long without running or moving the gas has turned to varnish...I suggest that you drain and refill the fuel tank,and replace the fuel filter located on/in the frame rail on drivers side.

Hi!!

The person that changed the oil should have resetted the light.

Just drive to an AutoZone store, ask for somebody to check your vehicle computer codes, once they check them up, ask them to reset the change oil soon light, they would do this at no charge. This is a free service they offered to all their customers.

Don't forget to rate this post. Good luck!!