I need to replace the BCM on my 1992 98 Regency, but I can't locate where it is. I thought it was on the passenger-side under the dash. When I pulled the panel off, couldn't find anything that looked like the replacement

In the engine compartment under the air cleaner. I think.

I looked and there isn't anything that even resembles the BCM anywhere in the engine compartment. Could it be under the dash anywhere?

Are you talking about the ECM? If you are, I believe it's located behind the glove compartment in the dash. I"m not sure, but I believe it was on the 91' 88 we serviced.

my 92 98 regency climate control shows 3 dashes only and erronious warning lights[low oil, low coolant] i am thinking bcm as well, but cant find it either. my local gm dealer gave me a part number 25646510. if you have located yours, please post location so i can save what hair i have left.