Two years is nothing compared to what many here have dealt with. You failed to tell us if it was running when parked. If so, pull the plugs and oil the cylinders. Hook up an external tank (boat tanks work well) and fire her up. If not, follow ALL the instructions listed in the Tech Tip linked by Tim.

Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
“I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line"! Hug a cop!
USAF 1965-1969 Weather Observation Tech (I got paid to look at the clouds)