Q: coolant release valves on 2002 Chevrolet Impala

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My previous question remains the same...2002 Chev Impala, 3400 V6 engine...I can not locate the coolant release valves anywhere in the manual. Please help!
(2) Answers
I owned a 2000 Chevy Monte Carlo with the same 3.4L engine. I performed most of the preventive maint. on the car, including coolant replacement (shade tree mechanic). I found two coolant release valves on the top side of the engine (one on the left side, the other on the right. The valves have a small brass screw with a head approx. 1/2" in diameter with a slot on top for a flat head screwdriver. Loosening the valves slightly while the engine is at running temp. should be sufficient for the trapped air to escape (NOTE: removing the screw completely will allow super-hot coolant to spray everywhere, including on you!!!). When you see coolant (no more air bubbles), re-tighten the screw. Be careful not to overtighten, the brass screws are fragile.

Best of luck, be careful, and God Bless.