Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to install a heater core in a chevy cavalier [title] Detach the negative battery line. [title] Lift the front end of your car and prop it up on jack stands. [title] Empty the radiator and loosen the seal to release the valve located under the front passenger's side.

Ending1: [step] It may rotate and come free, but it should come loose with a rough tug if it is seeking more air and so on. [title] Slide your glove compartment down and untwist/loosen the brass. Ending2: [title] Remove the bottom of the battery tray and loosen the spring of the cover a tad. [title] Take the jack stand from the interior (if not, simply use a socket to lift it off the ground) and detach and loosen the protective cover. Ending3: [title] Disconnect and remove the a/c heater drain tube from the firewall, if the car is equipped with air conditioning. [title] Detach the hoses from the heater core by releasing the clamps. Ending4: [title] Loosen the spring pin and hold it in place with the u nut where the radiator meets the windshield. [title] Turn the stereo on and remove the spark plug to inspect your engine thoroughly.

Answer format: ending1/ending2/ending3/ending4