Fixing a Heater Core Air Lock in a 1993 Grand Am: A Step-by-Step Guide

To remove an air lock from the heater core in a 1993 Grand Am, you will need:

1. A funnel

2. Coolant

Park the vehicle on a level surface.

Turn on the heater and set it to the highest temperature.

Open the hood and remove the radiator cap.

Locate the coolant tank (near the top of the engine, near the radiator).

Add some coolant to the coolant reservoir through the funnel.

Close the coolant tank cap.

Start the engine with the radiator cap off.

Let the engine run for a few minutes, watching the coolant level in the radiator.

If the coolant level drops, add more coolant until it stops dropping.

Replace the radiator cap.

Test the heater to ensure it is working properly.