GM Repair Problems? Ask GM Repair Expert Now.
I am sorry your having this problem
with it boiling and or spitting fluid out of the vent even after the filter change is showing something inside that transmission is over heating the fluid and causing this issue and the odds are there is a clutch pack or band slipping causing the fluid to over heat
especially if that fluid smells burnt i am sorry to say to fix this problem the transmission needs to come out and apart and more than likely rebuilt
also when you have transmission issues like this the transmission cooler built into the radiator must be changed as any particles from this failure going on from inside the transmission will restrict the cooler flow and will cause a new or rebuilt transmission to fail within 100 miles or under
how are you making out ?