Cadillac known for its large sedans that were popular among elderly consumers, Cadillac started expanding their brand to include SUVs like the Escalade, which became a large success for them. In order to deal with the knocking or chirping noise from the car try this out:
Carbon buster is a product available in any car engine parts store.
Run the car engine up to normal operating temperature and pour in approximately 1/3 to 1/2 of the contents of the can into the throttle body real fast until it stalls out the engine.
Turn the car off and let it cool overnight.
Next morning it will be extremely hard to start but it will eventually start and get it back up to normal operating temperature and raise the idle speed up to about 1500 rpm's and then gradually pour the rest of the contents of the can into the throttle body.
As soon as the product is poured in, keep the car engine running until all the smoke clears from the exhaust pipe and see if your knock or chirping sound is gone.
The carbon buster helps to melt the carbon deposits and keep the car engine parts clean and soundless.
Just try this out…
http://image.automotive.com/f/tech/11205933+pheader/0812phr_01_z+505_cadillac_engine+engine.jpg
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