[richtazz]

The water pump is one of the weak parts on the 3800. If you take your serp belt and the water pump pulley off, you'll see 2 holes in the water pump housing behind the pulley. If you see signs of coolant seepage around those holes, the water pump seals have failed and that's where your coolant is going. If you see no leakage on the ground or around the water pump, and the 8th digit of your vin # is a K, then you may have a upper plenum that has cracked internally and is dumping coolant into the intake.