Just noticed as the weather has gotten colder, a coolant drip off of the front driveshaft. Traced it up to a bolt on the oil filter adapter plate. Can't tell if it is coming from anywhere higher?? This is on an 03 2500 HD GMC. Any ideas since my 36K warranty is just about up. Thanks Edited by: 05LLY

oil cooler. The new style use a rubber thin gasket the old cooler used a metal molded gasket. I have seen many of these leak.