1994 1500 suburban, 5.7, automatic, AC. I'm needing to replace the seal/seals above the adapter where the oil filter spins on, now leaking again. A mechanic a few years ago did this, his part number was #088893990, but I can't find that anywhere, or anything about this part. Does anyone have a store source and part number for this? And instructions might help, too. I have NAPA, CarQuest, Checker/Schucks/Kragen, AutoZone near me, even Pep Boys.

OK, found this, tracked it down. What this is: it's the gasket kit / O-rings used when a tow package (front external oil cooler) is added to GM engines in trucks and SUVs. So it's called oil cooler seal kit, even though it's not on the oil cooler itself. Part number is Fel-Pro ES72671, and itit's even available at AutoZone and Checker/Schucks/Kragen for $10. After removing the oil filter, the adapter can be removed by removing two allen-head screws, with 1/4 inch allen wrench in a 1/4 inch socket.