ive been noticing im getting a coolant leak in my tahoe. traced it down to the thermostat housing dribbling coolant. i went to drain the radiator, but i dont have a petcock on the radiator. googled it and did plenty of searching on here. it says its on drivers side of radiator at bottom of course. what i have a what could have been a pet ****, and then a nipple to the outside of it to where a hose could be attached. but i physically dont have a wing nut shaped piece like what is commonly found here. i can put my finger into this area and cant feel any threads like mine would be broken off or anything. its just a smooth plug in this hole. i know an obvious way of getting coolant out is dropping the lower rad hose, but im trying to prevent that huge mess. can anyone enlighten me as to why i dont have a petcock on this truck??
