I've had this problem off and on for years. It's a chirp chirp chirp in a turn (typically a right turn for me). I discovered, after careful deductive analysis, that the noise was coming from the upper area of the front strut mount. Procedure #2 solves my problem. I've added some additional sugestions that I used as part of my "deductive analysis".
The remedy:
1. Purchase an aerosol can of Silicon Spray Lubricant (NOT spray oil or any other petroleum based lubricant - Silicon Spray Lubricant ONLY!) Get a can that has one of those 6" tubes that will help you direct the appication.
2. Open the hood of the car and stand adjacent one of the front wheels and look down at the top of the strut tower mount. You'll see a rather large nut that secures the strut to the mount assembly. Around that area you should notice that the strut tower (painted your Aurora's color) is sort of like open. Poke the tube in that area and spray some of the Silicon Lubrication around inside there. (Repeat this on the opposite side of your vehicle.)
3. Test vehicle to determine if the chirp is gone.
4. If chirp is not gone park your vehicle and turn your wheels completely to the right (or left) to give you access underneath. Turn off the vehicle. Poke your head between the tire and wheel well and notice where the spring is secured at the top and bottom of the strut assembly. Using the same Silicon Lubricant, spray some at the point where the spring makes contact with upper and lower spring seat. (Turn wheel in the opposite direction, turn off the vehicle, and repeat on the opposite side.)
Note: Use care not to get lubricant overspray on brake rotors. Caution, if you've just returned home and the vehicle is still warm your brake rotors and other components may be hot too. Don't burn yourself. Read the warnings on the Silicon Spray Can.
The tone of this may seem condesending. However, I am not familiar with your mechanical aptitude or your skill and knowledge in automobile repair/maintenance. Please do not take offense.