Originally Posted by ggenovez
No it does not. I just finished replacing the UIM and LIM gasket last winter. 180K No idea if it came from something else.
I replaced the UIM as well since it was leaking. Had to order a plastic one from doorman. my understanding was they made a different one for 92 than the other years.
You are absolutely correct, the 1992 UIM was different from other years, in that it was aluminium, and had no EGR passage. I believe all 91-92 L27 applications were like this. The 93-95 L27 applications received the plastic UIM (like yours), and had an EGR system as well.
Another concern to look at is see if it (vacuum distribution manifold maybe?) is to confirm it is the same as the GM unit. I seem to remember some issue with mine, like the old one didn't fit right so I had to use the new one when I replaced the UIM, which if that is the case, you will need to get one from Dorman, and not GM.
It may be time for a salvage yard trip, because it would also let you get replacement fuel injector harnesses, fuel lines, etc.
I don't know how hot it got under there, but my gut keeps nagging to urge replacement of the UIM. I wouldn't want it to crumble on you and make little plastic manifold bits get ingested, or anything else that may arise.