This morning i tryed to replace the spark plugs on my 2006 hummer h3 and i found some weather on 2 spark plugs and one ignition coil was damage, i dont know what can cause this im sure is not antifreze, i need help...

 

weather,water,whatever, water can find its way almost anywhere. some early h3 I5 engines had leakage thru the mounting bolts for the coils.
clean them all and seal them when you reinstall.
with a lotta luck you might find an OLD thread on coil pack leakage.