COOLANT LEAK - MID -ENGINE 2.4L 99 GRAND AM SE

sounds like your heater core might be bad and leaking

no engine told at all or country.
sold all over earth, with many engines sued.
cracks happen for 2 reasons
overheating the engine
or using only water for engine coolant, in winter , it turns to ICE cracks the engine block and heads in 1/2 total destruction easy as pie done wrong.
recalls, TSB pages
USA car, at the makers TSB pages , 1 hit only on word CRACK
quoted:
TS 35 12103, Special Coverage Extension for Specific Crack(s) in the Cylinder Head

SPECIAL COVERAGE EXTENSION FOR SPECIFIC CRACK(S) IN THE
CYLINDER HEAD.
MODEL(S): GRAND VITARA (JB) WITH 2.4L ENGINE
YEAR: 2009 (START OF PRODUCTION THROUGH JULY, 1 2009)
Engine overheating with possible Internal Engine Noise. The engine coolant
may leak from the cooling jacket into the Camshaft Housing of the Cylinder
Head. There will be no external coolant leak and there will likely be evidence
of coolant contamination in the engine oil.
CAUSE: Suzuki has determined that certain 2009 Grand Vitara vehicles may develop
a crack(s) between cylinder head bolt(s) and casting plug(s).
CORRECTION: A special coverage extension will apply for vehicles beyond the basic
warranty limits. The coverage allows repairs to be made for customers at no
charge for parts and labor up to 7 years or 102,000 miles, whichever comes
first, from the date of first use, at authorized Suzuki service points. Cracks in
locations other than the specified areas of the cylinder head do not qualify for
the coverage extension."

Sounds like a coolant leak, common problems on the caravan are water pump or radiator. No heat is due to low coolant.

If it is leaking out that fast is should be pretty easy to see where it is leaking from. Find the leak, repair the leak and your problem should be solved.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

I'm sorry to say your engine may be cooked.
Since you are adding both oil and coolant, and the color of the smoke is gray or white, you have the signs of the engine burning coolant.
The common cause is a leaking head gasket.

Your adding coolant frequently due to a leak some where in the cooling system or engine. It may be leaking in the form of steam overtime or leaking internally/externally from the engine. A coolant pressure test should be performed to isolate where this leak is coming from.

There are only 3 possibilities:
1) Coolant is leaking on the ground - puddle under the car.
2) Coolant is leaking into the engine crankcase - engine oil is "milky" looking.
3) Coolant is burned during combustion process - defective head gasket or intake gasket.
Let me know what you find and we will go from there.
Regards,

Sounds like the water pump, it will fling coolant as it leaks when the engine is running, also check the heater hoses and if coolant seems to come from the bottom of car and not the engine then it is a heater core leak.

'99 Grand Am have a plastic water outlet located on the back of the engine. (Same side as the battery). It is installed using a thin O-ring. Antifreeze is corrosive and weakens the O-ring causing a leak. Because of the location the leak can be almost undetectable. Replace the O-ring, but becareful not to break the water outlet.

those heater core are made of plastic pipe they go in and aluminium radiator i seen that a million time the plastic at the jointion of radiator crack if it not that the block heater there in the back there more likely to leak then the frost plug lift the car up as mush as you can dont trust does jack put a safety leg under our never to carefull apply pressure on the prestone you should see the leak let me know good luck pierre