How do you fill the V6 radiator?
'06 SS. Flushing the coolant.
1) I opened the petcock and drained out the old stuff, no problem. But how do I get new coolant into the radiator without a radiator cap?
2) The manual says it should hold about 2.5 gallons but I was only able to pour 1 gallon into the overflow bottle and now that's completely full.
3) I idled the car for a few minutes, hoping the water pump might pump the water out of the plastic bottle and into the radiator, but the level hasn't gone down any. While the car was idling, the skinny hose going into the top of the plastic bottle was recirculating water back the entire time.
Since I'm still 1.5 gallons low, it feels like I have a gallon of water circulating from the plastic overflow bottle, through the engine, and back without ever going into the radiator. Of course the "low coolant" message is on this entire time.
Am I doing something wrong? Is there a secret radiator cap for getting the full 2.5 gallons into the radiator?