See this Ignition Switch & Lock Cylinder
REMOVAL & INSTALLATION

http://www.autozone.com/.../...rGuideContent.jsp

shake the key around while trying to turn it. general motors lock cylinders do this so often that i never even notice anymore. i guess they thought it was a good idea to not be able to turn your key.

the lock cylinder may just be worn enough to not turn at all. no reset. if this makes sense, try shaking the key quickly in a circle while turning it. that seems to work the best for me when i get into a car that won't turn the key. they can be a real pain in the ass.

Check the engine/trans mounts, and the axles. Do you have new tires on all four wheels?

which end of front springs goes upwards

Replace the front brake pads and brake rotors. The rotors are warped.

If the back of the car is low, indicating that the air suspension is not working, and the air suspension light is on, check the fuse first. If the fuse is all right, check the air suspension switch in the trunk and make sure it is on. This switch is used when the car is in for service. Always turn off the switch before lifting the car, because the sensor will think the car is rising and keep the air bag valves open, ruining the rear air suspension.

Turn the ignition key with the engine off. Listen for the compressor to come on while pushing down on the rear bumper. If it does not come on, test the switch terminals for power, using a circuit tester. If one terminal has power and the other does not, replace the switch. If there is power, turn the switch to the off position, raise the vehicle and place it on jack stands in the rear. Inspect the leveling switch on the axle, making sure it is not bent and is connected. Use an ohmmeter for this test. Pull the electrical connector off the switch. Loosen the arm of the switch from the axle. Test the switch with the ohmmeter by checking across both terminals while slowly moving the arm. There should be no continuity with the arm down. As the arm is raised, there should be continuity. If not, replace the switch. If there was continuity, connect the arm and the electrical connector.

Put a floor jack under the axle and raise the axle to the point where it is just beginning to lift the car off the jack stand. Turn on the ignition. Turn the air suspension switch to the "on" position. Use the circuit tester to check for power at the leveling switch. If there is power, turn the air suspension switch to "off" and lower the car. Access the air compressor in the front, under the hood, and check the electrical connector for power. If there is power, check for a good ground. If both are good, replace the compressor. If the compressor works and the car does not rise in the back, replace the air bags.

Just in case the compressor is shot, ar you willing to get it fixed again? Or you want to convert and be worry free?

http://www.strutmasters.com/.../-cad-f1-d.htm

Did you already locate the cause of the leak (power steering hose/ power steering pump)? Did you already try to add power steering fluid with sealer?

Did you already locate the source of the leak? Try to add power steering fluid with sealer.

If you look at your power steering pully it will have 3 holes in it...thats is where your P/S pump is. follow the line until you see the reservoir.

What do you mean intake? The power steering system of your Cadillac is made up of two power steering hose which include a low pressure hose and a high pressure hose. Commonly used in making a high pressure hose is a reinforced synthetic compound with hose fittings that are commonly doubly compressed. A low pressure Cadillac Power Steering Hose on the other hand has similar features but it is not equipped with compression fittings since it is not subjected to high pressure. It is responsible for the transport of oil coming from the steering gear to be taken back to the oil pump. High pressure oil is carried, as implied, by the high pressure hose. The oil comes from the power steering pump to be transferred into the steering gear.

So technically, if its the intake you want then look for the one with fittings. But we dont really call it an intake.