Automobile(s): 1997 Deville, 89 Camaro, 07 Silverado Join Date May 2011 Location macon, ga Posts 363 Re: 1997 deville northstar coolant leak ok guys, well today was interesting. i found all parts except the O ring, i thought well maybe it is just the seal to the water pump housing, NOT.....filled up with antifreeze and still leaks.....however, i saw where....it is coming directly from the back of