Not familiar with your particular vehicle but most cars and trucks have a petcock ("T" shaped fitting) on the bottom of the radiator usually on the drivers side. You will needs a pair of pliers and CAREFULLY turn the petcock counter clockwise to open.
R134a
At the radiator or at the coolant resivoir.
On a 2005 Lincoln LS : ( the thread on cap on your engine coolant reservoir is the pressure cap / radiator cap ) * the engine coolant reservoir is on the drivers side of the engine compartment , by the firewall
On a Lincoln LS : The engine coolant reservoir is located in the engine compartment , on the drivers side , near the firewall ( I believe it has a thread on cap , which would be the pressure cap / radiator cap )
it is at the bottom of the Radiator on either the left or the right side...it is a plastic or metal threaded tab
Passengers side front behind the radiator area
Where the upper radiator hose connects to the engine.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Lincoln LS ( V8 )
no, they made many changes to the engine in 03. It wouldnt match up with the computer and you would have problems
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Lincoln LS ( V8 )
on top of coolant resivoir.....should be a black threaded cap.
In the front. Just like the other 99% of cars on the road.