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GM and GMC
Antifreeze and Engine Coolant
Radiators
Ford Ranger

What tool do you use to unscrew the radiator in a 2001 GMC if you want to flush the radiator?


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Wiki User
2005-08-11 00:55:01
2005-08-11 00:55:01

I believe ther is a petcock that can be opened with a 1/4" drive extension. You turn it about 1/3 of a turn and pull it out.

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Just below the radiator lower hose is the petcock. Unscrew it partially and it will drain. It has a "T" type handle that does not require any special tool. Be sure and save as much antifreeze as you can. If you do not reuse it then take it to a repair shop or AutoZone so that it will be disposed of properly.

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get a sharp pointed tool and tap the screw head along the edge in the unscrew direction be patient or you can buy a special tool at sears for that

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You just need a special torx socket & unscrew the old bolts. They have them at better tool stores like harbor freight.

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Remove engine cover and its next to the oil cap its a round plastic cap unscrew with the special tool or a big plyers and filter is under cap

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The easiest way is to pull the lower radiator hose. There is a petcock on the bottom of the radiator, but it's a pain to get to without a special tool. Pop the hose and you'll get about 85% of the coolant out. Have a large drain bucket handy. Make sure the engine is cool.


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