I am finally getting ready to tackle these pesky oil cooler hoses. Have searched and read many posts on the subject but still have one question. I am going to take both assemblies off and either have hydraulic fittings put on or use the hose/hose clamp solution. All depends on the cost to do the hydraulic hoses and fittings. I see up on the GM parts site that the hose that goes from engine to remote oil filter takes GM p/n 15701719 seal on end that goes to oil filter adaptor. Any GM parts diagrams do not show what goes on the end that goes to engine block adapter. Also the hose that goes from radiator to oil filter - Does it take the same parts number where it connects to the remote oil filter adapter? I know how to do the end that goes to the radiator as I had my radiator out last summer and am quite familiar with the little clips and o-rings.

 

Dorman HELP! 66201 has the correct gasket you need for the cooler line to the oil cooler adapter on the engine. I hope I under stood you question correctly.