I'm doing my own oil change on my 1995 Blazer and I decided to pull the entire cover down instead of just the oil filter access door and I can clearly see that the lines are drenched w oil where the rubber hose meets the aluminum line. I was wondering if this is common and is it as simple as buying new lines and replacing. I've attached a pic to clarify. Thanks so much for any help...!!!

 

YES it common. Yes its that simple. I redid mine while motor was out. I thought the lines going into the block was a bitch to get at. GL

 

Yes it is a common problem with anyone who owns a blazer or s10 with oil cooler lines.In your case, from what I can see..It`s best to just change out the whole set.I`ve seen with another member, who had replaced the hoses with (a custom set) of heavy duty style hydralic hoses.It was the 3000 lb pressure hoses, that would go on a back hoe or crane applications.He had the (barb) connections on both ends of the aluminum lines ,along with using 2 small regular stainless steel hose clamps on each end.It was a total of 8 clamps all together.