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I did a lot of work on my 3.4 DOHC this weekend. One thing has caught me off guard though. Before we did any work to the car, it would not warm up past the cold mark, or the 100 degree mark on my '95 Monte Carlo. It might've come to the line of the mark, or just a hair past, and that was it. We drained the radiator, put some water and flush in it, then ran it for like 15 minutes, then dumped that. We put new coolant in, and only got like 1 gallon, if not less back into it. It wouldnt take anymore. I drove it to a friends that night, and it was a in the dead center between warm and cold, then cooled back down to about 1/3 between hot and cold. (if that makes sense) It ran fine, i turned off the heater and got on it a little and it couldnt have been more perfect. Got it there and On the way back I got a SES light. I don't know what it is yet, but I'm pretty sure it's tranny related. (That's another story for the tranny shop to handle tomorrow.) On the way back, it was just about the cold mark again.... Would barely warm up. When we got back everything was warm, hoses, block, everything. Keep in mind this car will cook me out of it almost when it is cold, it blows plenty of hot air. Sorry for the long post, but I'm at a loss as far as this overcooling issue goes... I don't know what to do. Any help would be greatly appreciated... Thanks guys.