Radiator

Disconnect negative cable from battery.
Drain cooling system.
Remove air intake resonator.
Remove coolant reserve system tank to filler neck tube hose.
Disconnect fans from the connector located on the left side of the fan module.
Remove the coolant recovery system tank retaining screw from the upper radiator closure panel crossmember.
Disconnect the upper radiator closure panel crossmember.
Remove air cleaner assembly.
Disconnect inlet and outlet hoses from the radiator. Remove the lower hose clip from the fan module.
Remove A/C condenser fasteners and separate the condenser from the radiator. Verify the condenser is supported in position.
Remove A/C filter/drier mounting bracket, 2 bolts to the fan module, and 2 nuts to the filter/drier.
CAUTION: Care should be taken not to damage radiator cooling fins or water tubes during removal.

Radiator can now be lifted free from engine compartment.

Ok the radiator calls for 2.2 hrs to change so I would say in the driveway about 3.5 hrs or so. You need to drain the radiator and remove the upper hose the cooling fan and lower hose and remove the bolts that hold it on the top side and take it out. Now the oil light is probably the level sensor going bad.

Make sure the new radiator going to fit and no twisted and bent metal in the way
its usually easy to do
specially the engine was replaced recently

what you see is what need to be taken off
simple
disconnect hoses and tranny lines
fan

Depends on your engine size but will be between 10 and 12 quarts of coolant. Yes you can remove the resevoir tank

Hello, if your getting a new one, you tell the parts store, year- make- model- engine size. They look it up in their partsbook. If your going to get one at a salvage-yards, the better yards have catalogs. You could measure the height and width, mounting points on the old radiator and compare.

Do this prior to removing old radiator.

Locate the radiator cap on the top of your radiator and remove it. This is normally located closest to you when facing your vehicle from the hood area, around the middle of your vehicle's width. To remove, most require that you push down on the cap while turning. Place this somewhere that it will not get lost.

Find the radiator drain. Under your vehicle, normally on the left side when facing the hood, is the drain for your radiator. This can be seen clearly by lying underneath and facing the front bumper of your car. On most cars, find a butterfly screw that is unscrewed by hand. Before unscrewing, place your drainage bucket underneath to catch the drainage. Now unscrew your drain and leave for a few minutes. Depending on the size of your radiator, it can take 2 to 5 minutes to drain completely.

Re-screw the butterfly screw underneath your vehicle in the opposite direction as you unscrewed it. Place the funnel inside the mouth of your radiator. Fill your pitcher with water, and refill your radiator through the funnel. Remove the funnel and replace the cap. Run your engine until it reaches normal operating temperature, then shut it back off. Allow your vehicle to cool for about a half an hour. Dispose of the drainage as your local laws require.

Unscrew the radiator cap again, and put it in a place where it will not get lost. Replace the drainage bucket underneath your radiator drain plug under the left side of your vehicle if you are facing the hood. Unscrew the butterfly screw again, and allow your radiator to drain completely. This will again take anywhere from 2 to 5 minutes depending on your radiator size.

Replace the butterfly screw as soon as you have removed the drainage bucket. Dispose of your drainage again as your laws require. Replace the funnel in the mouth of your radiator. Open and pour the first gallon of coolant into the funnel. Once this is in, you will hear gurgles. Turn your engine on so that the coolant circulates through the system and gets rid of any air bubbles in the lines. Continue pouring the second gallon into your radiator until it is full. Check fullness by removing the funnel and looking straight into your radiator mouth. You should see a green fluid close to the upper neck of your radiator when it is full.

Replace the radiator cap when it is full. Go over to the side of your vehicle where the reservoir is located for your overflow of coolant. Pull the lid up and away, and pour the remainder of your coolant into the reservoir until it reaches the fill line drawn on the side. Replace the lid. You have just flushed and replaced your engine coolant.