My grandson's 2008 Grand Prix has an oil leak, and when I got under the car to investigate, I found what looks to me to be an engine oil cooler line that is leaking from the fitting on the bottom of the engine. I ordered a new line from Rock Auto (part number 624-791) which is listed on RA as engine oil line cooler hose/lower, but when it came in today it's labeled lower transmission cooler line. I've been searching for youtube videos to find out tips on installation and to verify I have the correct hose, but I'm not finding anything about engine oil coolant lines. As a matter of fact, I've searched anywhere that may have some information, but I'm not finding anything. Do these engines even have oil cooler lines for engine oil? I changed the engine oil and filter and the transmission oil and filter a month or so ago for him. The oil dripping looks like engine oil, not tranny oil. And since the transmission oil is nearly new, there's no way it could be as dark as it looks. Can somebody tell me if there are engine oil cooler hoses on these vehicles? I didn't get a picture, and the car is not here for me to get one, but the line I saw was about center of the vehicle coming out of a port on the bottom of what I thought was the engine, just behind the radiator. Pretty straight, unobstructed path when looking up at the front center of the engine compartment. Thanks for any help on this. Lee