Thanks for using JA,
Here is the procedure to bleed the system and good luck and let me know if you need any further assistance. If this helps please click on accept.
Notice: Pure coolant can be added to raise the boiling point of the coolant, but too much will affect the freezing point. Do not use a solution stronger than 70 percent, as the freeze level rises rapidly after this point. Pure coolant will freeze at -22°C (-8°F).
As far as gm's document there is not bleeder valve. To bleed the system all you have to do is ensure all your hoses are connected and then top off your coolant bottle. Turn the engine on and turn on your heater. Put it on the floor mode and blower on med. Let the engine run until the thermostat opens and watch your coolant level. Keep the coolant level at the right spot and after about ten minutes shut the vehicle off and let it cool down and recheck your coolant level. Let me know if you have any other questions.
After following your instructions on how to bleed out the air from my cooling system and replacing the thermostat, and checking for exhaust gases, which there are none, can you help me understand why when I drive the car for just a couple of miles it is still running almost into the red and the water is gurgling back into the surge tank. I am just about ready to burn this thing it is driving me crazy
This is what I would try. It sounds like one of two things is wrong. First you have air in the system. Second you have a flow problem. Let the vehicle cool completely off and then add coolant and put it to the proper level. Start the vehicle and let it warm up to normal operating temp. At this point ensure the thermostat opens and both upper and lower radaitor hoses are hot. Put the heater on hot in the car to allow the heater core to properly cycle to get the air out of it. Listen for abnormal noises in the coolant system. If it is backing into the bottle after you have it at normal operating temp, then we have a flow problem. Could be the radiator or the water pump. Let me know if you have replaced any of these and what you find.