1. Safety First:
* Turn off the vehicle immediately. Do not attempt to run the engine.
* Ventilate the cabin. Roll down the windows and open the doors to air out the interior.
* Do not attempt repairs yourself unless you have significant mechanical experience. Coolant leaks can be complex and finding the source requires expertise.
2. Identify the Source (with caution):
With the engine OFF and cool, carefully inspect the following areas, looking for wet spots, discoloration, or evidence of leaking coolant:
* Heater core: This is the most common culprit. The heater core is located inside the dashboard and is responsible for heating the cabin air. A leak here will allow coolant to drip onto the floor. This is difficult to access and repair.
* Firewall: Check the area where the engine compartment meets the passenger compartment (firewall) for any cracks or leaks around hoses or fittings.
* Water pump: While a leak here primarily affects the engine, it's possible some coolant could find its way into the cabin under certain conditions.
* Hoses: Examine all coolant hoses and connections for cracks, bulges, or loose clamps.
3. Seek Professional Help:
Given the location of the likely leak (heater core), this is a job best left to a qualified mechanic. They have the expertise and tools to:
* Diagnose the precise location of the leak. This might involve pressure testing the cooling system.
* Repair or replace the damaged component. This could involve replacing the heater core (a major job), repairing a hose, or fixing a leak in the firewall.
* Flush the cooling system. Once the leak is repaired, the cooling system needs to be flushed to remove any remaining coolant contamination.
4. Avoid Temporary Fixes:
Trying to patch the leak yourself without proper understanding can worsen the situation and lead to more damage. Avoid using stop-leak products, as they can often cause more harm than good.
In short: This is not a DIY job for most people. Get your 1993 Blazer to a qualified mechanic as soon as possible. The longer you wait, the greater the damage and the more costly the repair will become. The risk to your health is also significant.
