ALL warning lights on dash flash off and on - then go off for a few minutes then does it again. Car runs fine.

THE OIL SENDING UNIT GOT WET,WHAT EVER YOU DO,NEVER HOSE DOWN THE MOTOR,ALWAYS GET A DAMP RAG AND WIPE,THE OIL SENDING UNIT IS BY THE OIL FILTER.

the buzzer may just be a reminder to make you look at the dash to see that warning light.
You may need to get the dealer to have a look at it.
Sorry that isn't a solution, but something is better than nothing.

It says that your vehicle is low on coolant.Get the coolant level checked.If low has to be changed.

------------Check out few help links related to your issue.Click the link below:---


Service 4wd warning light on Dash? http://howtobyme.blogspot.com/2011/11/service-4wd-warning-light-on-dash.html

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Car Turns OFF due to low oil pressure warning light? http://schematicsdiagram.blogspot.com/2011/12/car-turns-off-due-to-low-oil-pressure.html

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Hybrid warning Light ON? http://whatisbyme.blogspot.in/2012/05/2005-toyota-prius-hybrid-warning-light.html

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Order Coolant Bypass Tube? http://whatisbyme.blogspot.in/2012/05/1991-toyota-camry-order-coolant-bypass.html

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Coolant Leak? http://technoanswers.blogspot.in/2012/04/1994-toyota-camry-coolant-leak.html

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COOLANT LEAK AT DRIVER SIDE NEAR FIREWALL? http://schematicsdiagram.blogspot.in/2012/04/2006-cadillac-dts-coolant-leak-at.html
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MAF, IAT, MAP and Coolant Level Sensor problem all together? http://schematicsdiagram.blogspot.com/2011/12/maf-iat-map-and-coolant-level-sensor.html

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Engine Coolant Temperature (ECT) Sensor Replacing? http://schematicsdiagram.blogspot.com/2011/12/gmc-engine-coolant-temperature-ect.html Loosing Coolant? http://whoisbyme.blogspot.in/2012/06/loosing-coolant.html
---------- Coolant temperature sensor dies again and again?

http://schematicsdiagram.blogspot.com/2012/01/coolant-temperature-sensor-dies-again.html
----------- Where to Add Coolant? http://repairhelpcenter.blogspot.in/2012/06/2000-daewoo-lanos-where-to-add-coolant.html
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------------ Blue Water Warning Light on Dash? http://whatisbyme.blogspot.in/2012/07/blue-water-warning-light-on-dash.html

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We had this same problem after my brother hooked up jumper cables backwards.
We had to replace computer boaord under the driver side dash. I can't for the life of me remember the name of it. lol But someone who can hooked that up and get the codes can tell you if it needs to be replaced. I found mine on ebay....they are Hard to find!

Sounds like the ignition switch going bad.

try to check your relays ,may need to replace them and check all your fuses

There are few help links provided to resolve this issue of dash board light not working.Click the link below to go through its procedure:-----Dash board lights not working? http://repairhelpcenter.blogspot.in/2012/02/dash-board-lights-not-working-on-gmc.html
----------- light in the dash blinks? http://repairhelpcenter.blogspot.com/2012/01/overdrive-light-in-dash-blinks.html
-----------Orange O/D warning light flashing on dash? http://repairhelpcenter.blogspot.com/2012/01/orange-od-warning-light-flashing-on.html
---------gauge on the dash quit working on? http://technoanswers.blogspot.com/2012/01/temperature-gauge-on-dash-quit-working.html---------No 4x4 light on dash? http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html
----------Digital Dash Display not working? http://schematicsdiagram.blogspot.com/2011/12/cadillac-seville-digital-dash-display.html
---------warning on dash and alarm sounds? http://schematicsdiagram.blogspot.com/2011/12/chevrolet-tahoe-hood-open-warning-on.html
---------Light Stays On dash of car? http://schematicsdiagram.blogspot.com/2011/06/brake-indicator-light-stays-on-dash-of.html
----------The ABS and Traction Control Lights stays ON dash of car? http://schematicsdiagram.blogspot.com/2011/06/abs-and-traction-control-lights-stays.html
----------warning lights remains steady on dash? http://schematicsdiagram.blogspot.com/2011/12/abs-brake-warning-lights-remains-steady.html
---------light bulb under dash replacement?

http://schematicsdiagram.blogspot.com/2011/12/heating-knob-light-bulb-under-dash.html

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Parking lights, tail lights and dash lights not working? http://technoanswers.blogspot.com/2012/01/parking-lightstail-lights-and-dash.html

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How to replace Instrument panel and dashboard?

http://repairhelpcenter.blogspot.in/2012/02/how-to-replace-instrument-panel-and.html

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Tail lights and dash light fuse keeps blowing? http://technoanswers.blogspot.in/2012/02/tail-lights-and-dash-light-fuse-keeps.html

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This will help.

Thanks.

Could be oil warning signal, check oil level, adjust to correct level.

TRY PUTTING KEY IN IGNITION SWITCH.TURN SWITCH TO RUN POSITION THE IMMOBILIZER WARNING LAMP WILL ILLUMINATE A FEW SECONDS.KEY CODE IS RECOGNIZED.IF IMMOBILIZER WARNING LAMP ILLUMINATES FOR A FEW SECONDS THEN FLASHES RAPIDLY KEY CODE NOT RECOGNIZED.TRY IT AGAIN FROM THE ABOVE INFORMATION.IF CAR STILL WONT CRANK.THE DEALERSHIP HAS TO REPROGRAM IT FOR YOU.

First thing to do is check all fluid levels, and top them up as needed, especially rad & oil. Have you checked owners manual for explanation ?