I have a 99 chevy suburban k1500 5.7 vortec that has coolant coming up through the throttle body as steam. This happened shortly after stepping on the gas to pass another vehicle. I don't know how the coolant runs and have no idea where to start looking. Any help is appreciated.

just checked the oil and it does notb look good, coolant in the motor oil.

Start with pulling the throttle body. I believe you have coolant passages that enter the TB. You may have blown the throttle body gasket.

if you have coolant in the oil its likely head gaskets. those engines are notorious for intake gaskets and water pump gaskets. so i would change the water pump while its down if you havent yet

funny you mention the water pump, replaced that about three weeks ago. Does removing the intake also call for removing the distributor and what do you think I would be looking at ($) to have the work done.

Thanks for the replies.

Trying to decide if it is worth saving since I also have that notorious hard shift from 1st to 2nd when the transmission gets warmed up but drives fine until then. Funny that when you turn off the engine for a few minutes that it goes away for a little while.

But mainly focussing on getting it running again.

the heads are going to have to come off so everything on top of the engine will have to be removed. i cant say how much it will be i do all my own work. if you dont feel you can do it get several estimates

i would charge about 250-300 do do something like that but im usually alot cheaper than other shops..So hopefully that gives you a low end ball park on having it done

thanks for the replies, now I need to decide what to do. Again thanks.