There are two kinds of coolant that can be found in this car. Look to see what color it is, either pink or green. It came stock with Dexcool antifreeze. This is a pink colored antifreeze made for aluminum engines. If it is green DO NOT put pink in there. NEVER mix pink and green coolants together. There is no differences among the green coolants. All will work but some are better than others. Also there are 50/50 ready-to-use coolant gal. containers. This has water already added in the coolant. If you get one that does not have water added you will need to add water. These are usually better for your buck.
Factory was Dex-cool (GM Approved) can not mix with any other except one labeled All Makes & Models.
SOURCE: ANTIFREEZE LEAKING
You are going to have to look carefully at everything and find where antifreeze is coming from. Could be that something was left a bit loose or that flushing opened up a weak spot on the radiator. This being said, it also could be spillage from service that has not been blown off yet... Watch your coolant level and temp gauge, or better yet, bring it back to who did service and have them go over it for you...checking leaks is an important part of the job...so is cleanup!
SOURCE: leaking antifreeze
Yes I think this is the obvious one here. It could also be a core plug weeping, but unlikely unless you've been using water instead of coolant.
Get a couple of quotes for waterpump AND timing belt replacement - as the belt usually has to come off anyway.
SOURCE: what kind of antifreeze do I use in my 1999 chevy ...
Use the green thats made for all vehicals, Never use the orange it eats seals
SOURCE: I have a 1997 chevy
The dealer recommend GM Dex Cool Antifreeze.
But there are complaint against this type of coolant.
http://www.stevesnovasite.com/forums/archive/index.php/t-128547.html
In GM cars we replace Dex Cool with Prestone green coolant.
It's up to you. Ask before but if you decide to change the type of coolant then:
If your intention is to add coolant only, then you need:
Mix with
ANY COLOR ANTIFREEZE
ALL MAKES ALL MODELS
of cars and light trucks
add to ANY color antifreeze
PRESTONE
50/50
PREDILUTED ANTIFREEZE/COOLANT
EXTENDED LIFE up to 150000/mile 5 year protection.
DO NOT ADD WATER.
If your intention is to flush the RADIATOR (Cooling System), then you need:
Mix with
ANY COLOR ANTIFREEZE
ALL MAKES ALL MODELS
of cars and light trucks
add to ANY color antifrezze
PRESTONE
EXTENDED LIFE up to 150000/mile 5 year protection.
On the back you have to read directions:
Step 1 Drain. Step 2 Flush. Step 3 Fill.
Recommended to ad 30% to 50% volume, distilled water. If you flush the system and rinse with water you must add only 30% water to the antifreeze. There is more water trapped inside the engine compartment, because the thermostat is closed. Make sure to have a coolant density tester. When you finish one of 5 balls must sink, that indicates that you reached 50/50 strength. That means 50% Prestone and 50% Water, which will provide to your car a -34F degree FREEZE-UP Protection , and +265F degree BOILOVER protection.The next day,with a cooled engine open radiator cap, and test the strength of coolant. If not quite right, then siphon coolant from the radiator and add antifreeze, or distilled water as necessary.
Make sure to disposal the used coolant properly.
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