If the timing were off, it would be possible to overheat an engine, and have the overflow throwing water at you. But, in newer cars, this is usally not the case. You might have a bad hose somewhere-radiator, or heater hoses. And/or, the thermostat could be bad. NOPE
"transmission fluid leaking from fitting below radiator cap after replacing radiator on 99 surburban
Probably your radiator fluid leaking out.
put radiator sealer in it or crack an egg in it
It is probably Radiator fluid that's leaking. if you have red radiator fluid. it looks purple when it heats up. I had this from my Toyota Sequoia when the leak went over the hot engine.
if you have an automatic transmission there should be cooling lines going to the radiator to cool the transmission fluid the lines could be leaking or the tank could be leaking
If a leak exists, there should be green or red fluid leaking from just under the nose of the car. It is possible that the engine must be running for the leaking to occur, but this is not always the case.
loose/cracked radiatior hoses
Green fluid leaking from a car is radiator fluid. "A professional certified mechanic can handle the repair or maintenance needed to fix this issue."
bad radiator cap
Find where the fluid is coming out and repair/replace it.
You have a leaking transmission cooler, usually part of the radiator. The transmission fluid is mixing with the antifreeze turning it pink.
looks like a sensor or thermostat going into engine block